Towards the study of the genus Tersilochus Holmgren, 1859 (Hymenoptera: Ichneumonidae: Tersilochinae) of the Russian Far East and Japan

2012·1.3 MB·

by  Khalaim, A I

Proceedings of the Zoological Institute RAS
Vol. 316, No. 4, 2012, рр. 344–360
УДК 595.792.13
TOWARDS THE STUDY OF THE GENUS TERSILOCHUS HOLMGREN, 1859
(HYMENOPTERA: ICHNEUMONIDAE: TERSILOCHINAE) OF THE RUSSIAN
FAR EAST AND JAPAN
A.I. Khalaim
Zoological Institute of the Russian Academy of Sciences, Universitetskaya nab. 1, 199034 St. Petersburg, Russia; Facultad de
Ingeniería y Ciencias, Universidad Autónoma de Tamaulipas, 87149 Cd. Victoria, México; e-mail: [email protected]
ABSTRACT
Seven species of the subgenus Tersilochus, genus Tersilochus, are described from the Russian Far East and Japan in
this paper: T. grandiculus sp. nov., T. hokkaidoensis sp. nov., T. impunctator sp. nov., T. juxtus sp. nov., T. konishii sp. nov.,
T. offrenatus sp. nov. and T. spasskensis sp. nov. Two species, T. curvator Horstmann and T. liopleuris (Thomson), are
recorded from the Russian Far East for the first time. A preliminary key to nine species of the subgenus Tersilochus,
occurring in the Russian Far East and Japan, is given.
Key words: Far East, Ichneumonidae, Japan, key to species, Russia, taxonomy, Tersilochinae, Tersilochus
К ИЗУЧЕНИЮ РОДА TERSILOCHUS HOLMGREN, 1859 (HYMENOPTERA:
ICHNEUMONIDAE: TERSILOCHINAE) ДАЛЬНЕГО ВОСТОКА РОССИИ И ЯПОНИИ
А.И. Халаим
Зоологический институт Российской академии наук, Университетская наб. 1, 199034 Санкт-Петербург, Россия;
Автономный Университет Тамаулипаса, 87149 Сьюдад Виктория, Мексика; e-mail: [email protected]
РЕЗЮМЕ
Семь видов подрода Tersilochus рода Tersilochus описаны с Дальнего Востока России и из Японии в этой ра-
боте: T. grandiculus sp. nov., T. hokkaidoensis sp. nov., T. impunctator sp. nov., T. juxtus sp. nov., T. konishii sp. nov., T.
offrenatus sp. nov. и T. spasskensis sp. nov. Два вида, T. curvator Horstmann и T. liopleuris (Thomson), отмечены на
Дальнем Востоке России впервые. Дан предварительный ключ девяти видов подрода Tersilochus, обитающих
на Дальнем Востоке России и в Японии.
Ключевые слова: Дальний Восток, Ichneumonidae, Япония, определительный ключ, Россия, систематика,
Tersilochinae, Tersilochus
INTRODUCTION Over 50 species of the genus occur in the Palaearctic
region, whereas the Nearctic fauna is virtually un-
Tersilochus Holmgren, 1859 is a moderately large, described (Horstmann 2001). Besides the Holarctic
predominantly Holarctic genus comprising three region, several species of Tersilochus are known from
subgenera with about 60 described species (Khalaim the Oriental, Afrotropical and Neotropical regions
2007, 2011; Khalaim and Sheng 2009; Yu et al. 2012). (Khalaim pers. obs.).
Tersilochus of the Russian Far East and Japan 345
The European fauna of the entire genus was revised SYSTEMATICS
by Klaus Horstmann (Horstmann 1971, 1981; Horst-
mann and Kolarov 1988). The subgenus Gonolochus Family Ichneumonidae Latreille, 1802
Förster, 1869 comprises five European species, oc- Subfamily Tersilochinae Schmiedeknecht, 1910
curring predominantly in Southern Europe, and T. Genus Tersilochus Holmgren, 1859
(G.) caudatus (Holmgren, 1860), which is abundant
and widely distributed across the Palaearctic region, Preliminary key to species of the subgenus
including the Russian Far East (Khalaim 2007). The Tersilochus occurring in the Russian Far East
subgenus Pectinolochus Aubert, 1980 comprises 18 and Japan
Palaearctic species, five of them occurring in the Rus-
1. Head and mesosoma distinctly punctate, mostly
sian Far East (Khalaim 2007). The largest subgenus, smooth between punctures (Figs 8, 9, 30). Notaulus
Tersilochus s. str., is very poorly studied outside of Eu- either as irregularly rugulose area or distinct wrinkle.
rope; only three species of this subgenus are known to Metacarp almost reaching apex of forewing (Figs 6, 28,
occur in the Eastern Palaearctic: two species, T. (T.) 37). Foveate groove of mesopleuron deep and sharp
(Figs 30, 40) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
ningxiator Khalaim et Sheng, 2009 and T. (T.) runa-
– Head and mesosoma granulate, impunctate or with
tus Khalaim et Sheng, 2009, were described from the
very indistinct punctures (Figs 13, 14, 19). Notaulus
Ningxia Hui Autonomous Region of China (Khalaim absent or weak. Metacarp shorter, not reaching apex of
and Sheng 2009), and one species, T. (T.) granulatus forewing (Figs 11, 21, 23, 32). Foveate groove of meso-
Khalaim, 2011, was recently described from South pleuron absent or weak (Figs 14, 19) . . . . . . . . . . . . . . . . 4
Korea (Khalaim 2011). 2. Tarsal claws weakly curved (Fig. 3). Ovipositor sheath
distinctly shorter than first tergite (Fig. 6). Foveate
Species of the genus are known mainly as para-
groove short, about half as long as mesopleuron . . . . . . . .
sitoids of the beetle families Chrysomelidae, Curcu-
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T. grandiculus sp. nov.
lionidae and Nitidulidae, although two species were
– Tarsal claws strongly curved (Figs 4, 5). Ovipositor
reared from Eriocraniidae (Lepidoptera) in leaf mines sheath longer, 1.3–2.6 times as long as first tergite (Figs
on birch in Europe (Jordan 1998) and some species of 28, 37). Foveate groove usually longer . . . . . . . . . . . . . . . 3
the subgenus Pectinolochus probably parasitise sawfly 3. First tergite of metasoma moderately slender, glymma
situated near or slightly behind its middle (Figs 40,
larvae of the family Tenthredinidae (Hymenoptera)
41). Thyridial depression distinctly elongate, about
(Yu et al. 2012).
1.5 times as long as broad. Ovipositor very robust (Fig.
This contribution begins a study of the subgenus
43), centrally twice as high as width of hind basitarsus;
Tersilochus of the Russian Far East and Japan. In this sheath 1.5–2.6 times as long as first tergite . . . . . . . . . . . . .
paper the most conspicuous and abundant species of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T. spasskensis sp. nov.
the fauna are included. A preliminary key to these – First tergite of metasoma slender, glymma situated far
species is given. behind its middle (Fig. 28). Thyridial depression as
long as broad. Ovipositor slender (Figs 28, 31), cen-
trally about as high as width of hind basitarsus; sheath
MATERIAL AND METHODS 1.3 times as long as first tergite . . . . . T. konishii sp. nov.
4. Ovipositor strongly upcurved at apex (Figs 1, 2). No-
This work is based on rich material of the Zoologi- taulus with weak wrinkles. Propodeum with basal area
(sometimes indistinct) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
cal Institute of the Russian Academy of Sciences, St.
– Ovipositor evenly upcurved. Notaulus completely ab-
Petersburg, Russia (further ZIN) and the National
sent. Propodeum with basal area or basal keel . . . . . . . . 6
Institute for Agro-Environmental Sciences, Tsukuba,
5. Ovipositor very strongly upcurved at apex (Fig. 2).
Japan (further NIAES). Material was examined us- Mesopleuron centrally smooth, with fine but distinct
ing MBS-10 stereomicroscope. Photographs were punctures. Foveate groove short and weak, but quite
taken at ZIN with a DFC 290 digital camera at- distinct. Flagellum with 18–21 segments . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T. liopleuris Thomson
tached to a Leica MZ16 stereomicroscope; images
– Ovipositor not so strongly upcurved at apex (Fig. 1).
were combined using Helicon Focus software. Wing
Mesopleuron granulate, without distinct punctures.
venation and morphological terms predominantly
Foveate groove absent or sometimes as more densely
follow Townes (1969, 1971) with changes according granulate or very shallowly wrinkled area. Flagellum
to Khalaim (2011). with 16–18 segments . . . . . . . . . T. curvator Horstmann
346 A.I. Khalaim
6. Malar space about half as long as basal width of mandi- Sakhalin Prov., south of Sakhalin I., Novoalexan-
ble. Flagellum with 18–21 segments. Ovipositor sheath drovsk, 23 May 1973, coll. I.M. Kerzhner. 8 females
as long as first tergite or shorter (Figs 16, 22) . . . . . . . . 7 (ZIN), south of Sakhalin I., 12 km S of Kholmsk,
– Malar space longer, 0.8–1.2 times as long as basal width
Pravda, 25 May 1973, coll. I.M. Kerzhner. 2 females
of mandible. Flagellum with 15–17 segments. Oviposi-
(ZIN), Sakhalin I., Aniva Distr., 9 km NE of Yuzhno-
tor sheath more than twice as long as first tergite (Figs
sakhalinsk, Susaninskiy Mts, Chechova Mt., 30 May
23, 32) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1988, coll. Nesterov. 1 female (ZIN), Kurile Islands,
7. Flagellum very slender, with 19–21 segments (Fig. 12);
second flagellomere at least 2.5 times as long as broad. Kunashir I., Dubovoe, birch-oak forest, 10 June 1973,
Propodeum with basal area (Fig. 15). Metasoma behind coll. I.M. Kerzhner. 1 female (ZIN), Kamchatka Terr.,
first segment dark brown (Fig. 11) . . . . . . . . . . . . . . . . . . . . . 12 km NW of Petropavlovsk-Kamchatskiy, flood
. . . . . . . . . . . . . . . . . . . . . . . . . . . T. hokkaidoensis sp. nov. plain forest, 14 June 1975, coll. Barkalov.
– Flagellum less slender, with 18–19 segments (Fig. 17); Distribution. Transpalaearctic species: Europe,
second flagellomere at most 1.8 times as long as broad.
Russian Far East (Sakhalin I., Kunashir I., Primors-
Propodeum with basal keel (sometimes indistinct)
kiy Terr., Kamchatka Terr.).
(Fig. 20). Metasoma brownish yellow ventrally to dark
Biology. Reared from a lepidopterous host, Erio-
brown dorsally (Figs 20, 22) . . .T. impunctator sp. nov.
crania cicatricella (Zetterstedt, 1839) (Lepidoptera:
8. Nervellus of hind wing vertical or slightly reclivous.
Propodeum with basal area (Fig. 35). Ovipositor with Eriocraniidae), in leaf mines on birch in Europe (Jor-
shallow dorsal subapical depression (Fig. 36) . . . . . . . . . . dan 1998).
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T. offrenatus sp. nov.
– Nervellus of hind wing distinctly reclivous. Propodeum Tersilochus (Tersilochus) grandiculus sp. nov.
with basal keel (sometimes indistinct) (Fig. 26). Ovi- (Figs 3, 6–10)
positor with narrow dorsal subapical notch (Fig. 27) . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T. juxtus sp. nov.
Holotype. Female – RUSSIA: Primorskiy Terr.,
Novokachalinsk, Khanka Lake, meadows, bushes,
Tersilochus (Tersilochus) curvator oak-forest, 13 August 2003, coll. S.A. Belokobylskij
Horstmann, 1981 (ZIN).
(Fig. 1) Paratypes. RUSSIA: 2 females (ZIN), Primor-
skiy Terr., 5 km W of Anisimovka, forest, 7 August
Material. RUSSIA: 1 female (ZIN), Primorskiy 1993, coll. S.A. Belokobylskij. 1 female (ZIN), 15 km
Terr., Gorno-Taezhnaya station, arboretum, 3 May SW of Spassk-Dal’niy, forest, meadows, 22 July 1991,
1983, coll. S.Yu. Sinev. 1 male (ZIN), same data coll. S.A. Belokobylskij. 1 female (ZIN), Irkutsk, coll.
but sampled at light, 15 May 1983. 1 female (ZIN), V. Yakovlev.
Figs 1–5. Tersilochus spp., females. 1 – T. curvator (Hibiny); 2 – T. liopleuris (Kamchatka); 3 – T. grandiculus sp. nov.; 4 – T. konishii sp. nov.;
5 – T. spasskensis sp. nov. 1–2 – apex of metasoma with ovipositor, lateral view; 3–4 – claw of hind tarsus.
Tersilochus of the Russian Far East and Japan 347
Figs 6–10. Tersilochus grandiculus sp. nov., females (holotype except Fig. 10). 6 – habitus, lateral view; 7 – head with antennae, lateral view;
8 – head, dorsal view; 9 – head, frontal view; 10 – apex of metasoma with ovipositor (paratype, Primorskiy Terr.), lateral view. Scale bar
for Fig. 6 = 1.0 mm, for Figs 7–9 = 0.5 mm.
Etymology. From the Latin grandiculus (rather Description. Female. Holotype. Body length
large), on account of its large body size. 5.6 mm. Forewing length 4.6 mm.
Differential diagnosis. This is one of the most Head rounded behind eyes in dorsal view (Fig.
distinct species of the genus that is immediately 8); temple 0.73 times as long as eye width. Clypeus
recognized by its large body size, distinctly punctate smooth, distinctly punctate in upper 0.6, punctures
head and mesosoma, and short ovipositor. It differs are rather dense near upper margin. Mandible robust,
from two similar Far Eastern species, T. konishii sp. with upper tooth longer than lower tooth. Malar
nov. and T. spasskensis sp. nov., by the weakly curved space 0.7–0.9 times as long as basal width of mandible.
tarsal claws, shorter foveate groove of mesopleuron Flagellum of antenna distinctly tapered towards apex,
and short ovipositor. with 23–24 flagellomeres (24 flagellomeres in holo-
348 A.I. Khalaim
type); subbasal flagellomeres about 1.6–1.8 times, legs (hind coxa brownish black basally) brownish
mid and subapical flagellomeres 1.4–1.6 times as long yellow; lower 0.3 of clypeus brownish. Scape and
as broad (Fig. 7). Face, frons and vertex very densely pedicel of antenna brownish yellow, flagellum dark
punctate, smooth and weakly shining between punc- brown basally to blackish apically. Pterostigma dark
tures (Figs 7–9); distance between punctures on face brown. Metasoma behind first tergite reddish brown;
and frons shorter than one diameter of puncture. Tem- tergites 2 and 3 dorsoanteriorly blackish.
ple moderately densely punctate, smooth and shining Male. Unknown.
between punctures. Occipital carina complete. Distribution. Southern Siberia (Irkutsk Prov.)
Mesoscutum densely punctate (distance between and south of the Russian Far East (Primorskiy Terr.).
punctures mostly subequal to one diameter of punc- Biology. Unknown.
ture), very finely granulate peripherally and almost
smooth centrally between punctures. Notaulus ir- Tersilochus (Tersilochus) hokkaidoensis sp. nov.
regularly rugulose. Mesopleuron distinctly punctate, (Figs 11–16)
smooth between punctures. Foveate groove about
half as long as mesopleuron, upcurved anteriorly, Holotype. Female – JAPAN: Hokkaido I.,
with strong transverse carinae. Dorsolateral area of 35–40 km S of Sapporo, Shikotsuko Lake, 4 Septem-
propodeum distinctly and densely punctate, smooth ber 1999, coll. S.A. Belokobylskij (ZIN).
between punctures. Basal area of propodeum indis- Paratypes. JAPAN: 12 females, 1 male (ZIN), same
tinct, short and broad, widened anteriorly, rather data as holotype. 6 females, 3 males (ZIN), Hokkaido
deeply impressed. Basal part of propodeum 0.3 times I., Sapporo, Mt Maruyama, forest, rocks, 5 September
as long as apical area. Propodeal spiracle moderately 1999, coll. S.A. Belokobylskij. 2 females (ZIN), same
large, separated from pleural carina by 1.5–2.0 diam- locality and collector, 12 September 1999. 5 females
eters of spiracle. Apical area flat, punctate anteriorly (ZIN), Honshu I., Tochigi Pref., Nikko, forest, 2–3
and irregularly wrinkled posteriorly, rounded ante- October 1999, coll. S.A. Belokobylskij.
riorly; apical longitudinal carinae distinct, reaching Etymology. Named after the type-locality, Hok-
transverse carina anteriorly. kaido.
Forewing with second recurrent vein postfurcal. Differential diagnosis. Differs from other Far
Intercubitus moderately thick, somewhat longer than Eastern species of the genus by a combination of slen-
abscissa of cubitus between intercubitus and second der flagellum, granulate and impunctate head and me-
recurrent vein. First abscissa of radius somewhat sosoma, dark brown metasoma and short ovipositor.
longer than width of pterostigma. Metacarp almost Description. Female. Holotype. Body length
reaching apex of forewing. Postnervulus intercepted 3.5 mm. Forewing length 3.3 mm.
distinctly below middle. Hind wing with nervellus Head rounded behind eyes in dorsal view (Fig.
vertical. 13); temple 0.75 times as long as eye width. Clypeus
Legs slender. Hind femur 3.7 times as long as distinctly convex in lateral view, with lower margin
broad and 0.78 times as long as tibia. Claws moder- somewhat truncated, smooth in lower third, finely
ately long, weakly curved, not pectinate (Fig. 3). granulate and very finely and sparsely punctate
First tergite 3.0 times as long as posteriorly broad, in upper 2/3. Mandible with upper tooth longer
entirely smooth, with petiole round centrally in cross- than lower tooth. Malar space about half as long as
section. Glymma joining ventral part of postpetiole basal width of mandible. Flagellum of antenna very
by distinct groove, situated behind middle of first slender, filiform, with 19–21 flagellomeres (20 flagel-
tergite. Second tergite 1.1 times as long as anteriorly lomeres in holotype); second flagellomere about 2.5
broad. Thyridial depression shallow, slightly elongate. times, mid flagellomeres 1.7–2.0 times, and subapical
Ovipositor short, fairly upcurved and thickened api- flagellomeres 1.5–1.7 times as long as broad (Fig. 12).
cally, with moderately sharp dorsal subapical depres- Face, frons, vertex and temple entirely granulate,
sion and usually with more or less distinct rounded impunctate; granulation on temple more shallow. Oc-
tooth before this depression (Fig. 10); sheath about cipital carina complete.
0.75 times as long as first tergite and hind tibia. Mesosoma entirely granulate, impunctate; meso-
Head, mesosoma and first segment of metasoma pleuron centrally with weak oblique wrinkles. Notau-
black. Palpi, mandible (teeth blackish), tegula and lus absent. Foveate groove of mesopleuron weak and
Tersilochus of the Russian Far East and Japan 349
Figs 11–15. Tersilochus hokkaidoensis sp. nov., female (holotype). 11 – habitus, lateral view; 12 – head with antennae and anterior part
of mesosoma, lateral view; 13 – head, dorsal view; 14 – head and mesosoma, lateral view; 15 – propodeum and first metasomal segment,
dorsolateral view. Scale bar for Fig. 11 = 1.0 mm, for Figs 12, 14 and 15 = 0.25 mm.
short. Propodeum with basal area (often indistinct), Apical area flat, rounded or roundly pointed anteri-
which is more or less rectangular, slightly widened orly; apical longitudinal carinae weak, not reaching
anteriorly, 2.5–3.0 times as long as broad and about transverse carina anteriorly.
0.55 times as long as apical area (Fig. 15). Propodeal Forewing with second recurrent vein postfurcal.
spiracle small, adjacent to pleural carina or separated Intercubitus thick and short, much shorter than
from this carina at most by half diameter of spiracle. abscissa of cubitus between intercubitus and second
350 A.I. Khalaim
recurrent vein. First abscissa of radius longer than Differential diagnosis. Similar to T. hokkaidoen-
width of pterostigma. Metacarp somewhat not reach- sis sp. nov. as both have granulate, impunctate head
ing apex of forewing. Postnervulus intercepted below and mesosoma, short malar space, short metacarp and
middle. Hind wing with nervellus vertical or slightly short ovipositor, but differs from T. hokkaidoensis by
reclivous. the less slender flagellum, propodeum with basal keel
Legs slender. Hind femur 0.89 times as long as and coloration of metasoma.
tibia. Spurs of hind tibia slightly curved. Claws not Description. Female. Holotype. Body length
pectinate. 3.6 mm. Forewing length 3.25 mm.
First tergite almost 3.0 times as long as poste- Head rounded behind eyes in dorsal view (Fig.
riorly broad, laterally smooth, dorsally centrally 18); temple 0.74 times as long as eye width. Clypeus
striate; petiole slightly trapeziform centrally in cross- convex in lateral view, more or less smooth in lower
section. Glymma moderately large, joining ventral part, sparsely and indistinctly punctate and finely
part of postpetiole by distinct groove, situated dis- granulate in upper part. Mandible with upper tooth
tinctly behind middle of first tergite. Second tergite longer than lower tooth. Malar space half as long as
slightly transverse. Thyridial depression about as basal width of mandible. Flagellum of antenna short,
long as broad. Ovipositor short, weakly upcurved, weakly tapered towards apex, with 18–19 flagel-
slightly thickened apically, with weak dorsal subapi- lomeres (18 flagellomeres in holotype); all flagel-
cal depression (Fig. 16); sheath as long as or slightly lomeres moderately elongate (Fig. 17). Face, frons,
shorter than first tergite and hind tibia. vertex and temple entirely granulate, impunctate.
Head, mesosoma and first metasomal segment Occipital carina complete.
black. Palpi, mandible (teeth reddish) and tegula Mesosoma granulate, impunctate; mesopleuron
brownish yellow. Lower half of clypeus brownish centrally with weak slightly oblique wrinkles; apical
yellow to reddish brown. Antenna with scape and area of propodeum finely irregularly rugulose. Notau-
pedicel brownish yellow ventrally to brown dorsally, lus absent. Foveate groove of mesopleuron absent or
flagellum black. Pterostigma brown. Legs brownish very weak. Propodeum with weak basal keel (some-
yellow, hind coxa brownish or blackish basally. Meta- times indistinct), which is half as long as apical area
(Fig. 20). Propodeal spiracle small; distance between
soma behind first tergite dark brown.
spiracle and pleural carina less than 1.5 diameters of
Male. Similar to female, but flagellum with 21–22
spiracle. Apical area flat, wide, more or less rounded
segments, malar space shorter and metasomal tergites
anteriorly; apical longitudinal carinae very weak,
longer.
usually indistinct.
Distribution. Japan (Hokkaido and Honshu).
Forewing with second recurrent vein postfur-
Biology. Unknown.
cal. Intercubitus moderately thick, about as long as
abscissa of cubitus between intercubitus and second
Tersilochus (Tersilochus) impunctator sp. nov.
recurrent vein. First abscissa of radius somewhat lon-
(Figs 17–22)
ger than width of pterostigma. Metacarp not reaching
apex of forewing. Postnervulus intercepted distinctly
Holotype. Female – RUSSIA: Primorskiy Terr., below middle. Hind wing with nervellus vertical.
Anisimovka, valley forest, meadows, 7 June 1993, Legs slender. Hind femur 0.83 times as long as
coll. S.A. Belokobylskij (ZIN). tibia. Claws moderately long, not pectinate.
Paratypes. RUSSIA, Primorskiy Terr.: 2 females First tergite 3.2 times as long as posteriorly broad,
(ZIN), same data as holotype. 4 females (ZIN), usually smooth; petiole trapeziform centrally in
30 km SE of Ussuriysk, Ussuriysk Nature Reserve, cross-section, dorsally and laterally sometimes stri-
mixed forest, 11 June 1995, coll. S.A. Belokobylskij. ate. Glymma moderately large, joining ventral part
1 female (ZIN), 20 km SW of Putsilovka, Monakino, of postpetiole by distinct groove, situated behind
forest, 27 June 1993, coll. S.A. Belokobylskij. 1 fe- middle of first tergite. Second tergite 1.1 times as
male (ZIN), Vladivostok, Sedanka, 14 June 1979, long as anteriorly broad. Thyridial depression short.
coll. A.G. Zinoviev. Ovipositor short and slender, weakly upcurved, with
Etymology. The species name refers to the im- shallow dorsal subapical depression and usually also
punctate, granulate head and mesosoma. weak tooth before this depression (Fig. 22); sheath
Tersilochus of the Russian Far East and Japan 351
Figs 16–22. Tersilochus spp., females. 16 – T. hokkaidoensis sp. nov. (holotype); 17–22 – T. impunctator sp. nov. (holotype except Fig. 17).
16, 22 – apex of metasoma with ovipositor, lateral view; 17 – antennae (paratype), lateral view; 18 – head, dorsal view; 19 – head and
mesosoma, lateral view; 20 – propodeum and base of metasoma, dorsal view; 21 – forewing. Scale bar for Fig. 16 = 0.5 mm.
0.8 times as long as first tergite and 0.75 times as long flagellum yellowish basally to blackish apically, or
as hind tibia. entirely black. Pterostigma brown. Legs brownish
Head and mesosoma black. Palpi, mandible (teeth yellow, all coxae brownish. First metasomal segment
dark red), lower third of clypeus and tegula brown- brown to brownish black. Metasoma behind first
ish yellow. Scape and pedicel of antenna yellowish; tergite yellowish brown ventrally to brown dorsally.
352 A.I. Khalaim
Male. Unknown. and temple entirely granulate, impunctate. Occipital
Distribution. South of the Russian Far East: Pri- carina complete.
morskiy Terr. Mesosoma entirely granulate, impunctate; meso-
Biology. Unknown. pleuron centrally with weak oblique wrinkles. No-
taulus absent. Foveate groove of mesopleuron short,
Tersilochus (Tersilochus) juxtus sp. nov. weak. Propodeum with weak basal keel (sometimes
(Figs 23–27) indistinct), which is about half as long as apical area.
Propodeal spiracle very small; distance between
spiracle and pleural carina equal to about one diam-
Holotype. Female – RUSSIA: Sakhalin Prov.,
eter of spiracle. Apical area flat, rounded anteriorly;
Kunashir I., Dubovoe, 10 June 1973, coll. I.M. Ker-
apical longitudinal carinae weak, usually reaching
zhner (ZISP).
transverse carina anteriorly.
Paratypes. RUSSIA, Sakhalin Prov.: 6 females, 4
Forewing with second recurrent vein postfurcal.
males (ZIN), same data as holotype. 4 females (ZIN),
Intercubitus thick, shorter or subequal to abscissa
same locality, 19 July 1973, coll. D.R. Kasparyan. 4
of cubitus between intercubitus and second recur-
females (ZIN), Kunashir I., 5 km N of Golovnino,
rent vein. First abscissa of radius longer than width
Dubovoe, oak-forest, meadows, 25 July 1981, coll. S.A.
of pterostigma. Metacarp not reaching apex of fore-
Belokobylskij. 7 females (ZIN), Kunashir I., volcano
wing. Postnervulus intercepted much below middle.
Golovnina, Goryachee Lake, on Sasa sp. and Pinus
pumila, 26–28 July 1981, coll. S.A. Belokobylskij. 2 Hind wing with nervellus distinctly reclivous (angle
females (ZIN), Kunashir I., volcano Golovnina, fron- about 30°).
tier post, 24–25 July 1973, coll. D.R. Kasparyan. 1 fe- Legs slender. Hind femur 0.78 times as long as
male (ZIN), Kunashir I., 10 km S of Yuzhno-Kuril’sk, tibia. Claws not pectinate.
mixed forest, 20 July 1981, coll. S.A. Belokobylskij. 1 First tergite almost 3.0 times as long as posteri-
female (ZIN), Kunashir I., 2–7 km S of Sernovodsk, orly broad, partly smooth; petiole slightly trapezi-
17 July 1973, coll. D.R. Kasparyan. 2 females (ZIN), form centrally in cross-section, dorsally and laterally
Sakhalin I., 12 km W Aniva, Urozhaynoe, mixed for- sometimes finely striate. Glymma moderately large,
est, 9 July 1981, coll. S.A. Belokobylskij. joining ventral part of postpetiole by distinct groove,
Etymology. From the Latin juxtus (nearly, near, situated behind middle of first tergite. Second tergite
close to). as long as anteriorly broad. Thyridial depression as
Differential diagnosis. Differs from the Eu- long as broad or slightly transverse. Ovipositor long
ropean T. longicaudatus Horstmann, 1971 by the and slender, weakly and evenly upcurved, with nar-
short foveate groove of the mesopleuron (absent or row dorsal subapical notch (Fig. 27); sheath 2.6 times
vestigial in T. longicaudatus), from the Far Eastern as long as first tergite and 2.4 times as long as hind
T. offrenatus sp. nov. by the nervellus of hind wing tibia.
distinctly reclivous and propodeum with basal keel, Head and mesosoma black. Palpi, mandible (teeth
and from both species by the ovipositor with narrow reddish), lower half of clypeus and tegula brown-
dorsal subapical notch (Fig. 27). ish yellow. Antenna brown, slightly paler basally.
Description. Female. Holotype. Body length Pterostigma pale brown. Legs brownish yellow, all
3.0 mm. Forewing length 2.7 mm. coxae more or less brownish. First metasomal seg-
Head rounded behind eyes in dorsal view (Fig. ment dark brown to brownish black. Metasoma be-
24); temple 0.82 times as long as eye width. Clypeus hind first tergite dark brown.
weakly to moderately convex in lateral view, more Male. Similar to female, but flagellum slenderer,
or less smooth in lower part, sparsely punctate and with 17 segments, malar space shorter and tergites 1
evenly granulate in upper part. Mandible with upper and 2 of metasoma longer.
tooth longer than lower tooth. Malar space 0.8–1.0 Variation. Ovipositor sheath 2.5–3.0 times as
times as long as basal width of mandible. Flagellum long as first tergite. Basal flagellomeres sometimes
of antenna moderately slender, more or less filiform, shorter than in description.
with 16 flagellomeres (in all specimens); second flag- Distribution. South of the Russian Far East:
ellomere about twice, subapical flagellomeres 1.3–1.5 Sakhalin Prov. (Sakhalin I., Kunashir I.).
times as long as broad (Fig. 25). Face, frons, vertex Biology. Unknown.
Tersilochus of the Russian Far East and Japan 353
Figs 23–27. Tersilochus juxtus sp. nov., female (holotype). 23 – habitus, lateral view; 24 – head and mesoscutum, dorsal view; 25 – antenna,
lateral view; 26 – propodeum and base of metasoma, dorsal view; 27 – apex of metasoma with ovipositor, lateral view. Scale bar for Figs 23
and 27 = 1.0 mm, for Figs 25 and 26 = 0.5 mm.
Tersilochus (Tersilochus) konishii sp. nov. Description. Female. Holotype. Body length
(Figs 4, 28–31) 5.6 mm. Forewing length 4.8 mm.
Head rounded behind eyes in dorsal view; temple
Holotype. Female – JAPAN: Kagoshima Pref., 0.68 times as long as eye width. Clypeus smooth in its
Okuchi City, Oku-Jusso, 19 May 1982, coll. K. Koni- lower part, distinctly punctate and smooth between
shi (NIAES). punctures in upper 0.6. Mandible robust, with upper
Etymology. Named in honour of the Japanese tooth longer than lower tooth. Malar space half as
expert in Ichneumonidae and collector of the type long as basal width of mandible. Flagellum of antenna
material, Dr. Kazuhiko Konishi. weakly tapered towards apex, with 25 flagellomeres;
Differential diagnosis. Very similar to T. subbasal and mid flagellomeres 1.4–1.7 times, subapi-
spasskensis sp. nov., but ovipositor is shorter and slen- cal flagellomeres 1.2–1.4 times as long as broad; flag-
derer (Fig. 31), and first metasomal segment longer, ellomeres 2–6 bearing finger-shaped sensory struc-
with glymma situated far behind the middle of the tures at apex of outer surface (Fig. 29). Face, frons
segment (Fig. 28). and vertex very densely punctate and very finely