Aquatic dance flies from a small Himalayan mountain stream (Diptera: Empididae: Hemerodromiinae, Trichopezinae and Clinocerinae)

30 Pages·2001·15.8 MB·English

by  Rüdiger Wagner

)
Bonner zoologische Beiträge Band 52 (2004) Heft 1/2 Seiten 1-2 Bonn, August 2004
A new Mecynotarsus from Pakistan (Coleóptera, Anthicidae)
Gerhard Uhmann
Pressath, Germany
Abstract. Mecynotarsus bordonii sp. n. from Pakistan is described and illustrated.
Riassunto. L'autore descriveMecynotarsus bordonii sp. n. from Pakistan.
Keywords: Taxonomy, new species.
Dr. Amaldo Bordoni (Museum "La Specola" in Flor- Mecynotarsus bordonii sp. n. (Fig. 1
ence, Italy) sent to me 583 anthicides beetles for deter- SW
Holotype (female): Pakistan, 17.-18.4.1993, Balo-
mination. This sample contains mainly specimens from
chistan, Gwadar, leg. S. Becvar, in coll. Bordoni, Flor-
Asia (China, Laos, Malaysia, Pakistan, Thailand, Turk-
A ence.
menistan) Italy and Kazakhstan. single specimen is
present of an undescribed species. Neither the classical Measurements (in mm): Total length 3.5, max. width
work of La FertÉ-SénectÉre (1849) nor the mono- 1.1. Head length 0.8, width (across the eyes) 0.6. Prono-
graph ofthe genus Mecynotarsits LaFerté by Heberdey tum length 1.4, width 0.9. Horn length 0.6, width 0.5.
(1942) contain a comparable species.' Elytra length 2.1, combined width 1.1.
Coloration: Yellowish-brown with dark brown spots on
elytra.
Head: Little shiny, wrinkled. Pubescence silvery, rather
stout, but very short. Antennae conspicuous thin, pubes-
cence fine.
Pronotum: Little shiny. Punctuation nearly covered by
silvery, stout, dense, recumbent pubescence. Horn on
each side with seven teeth, becoming smaller posteri-
orly. Crest consists of seven lengthy bumps, forming a
nearly closed line. Row of stout, rounded bumps in
middle ofhorn.
Elytra: Rather shiny. Punctuation strong. Spaces be-
tween punctures inuch smaller than punctures. These
become smaller posteriorly, spaces larger. Pubescence
silverish, stout, rather dense, recumbent.
Legs: Pubescence very fine.
Remarks: By the length ofthis species there is nothing
in comparison with all other known species of this ge-
nus.
Derivatio nominis: I name this new species after the
well known coleopterist Dr. Amaldo Bordoni in Flor-
ence.
Acknowledgements: My thanks go to Dr. Bordoni for
sending this very interesting material.
Fig. 1: Mecynotarsus bordoniisp. n., holotype, female, habitus.
65' contributiontotheknowledge ofAnthicidae
2 Bonnerzoologische Beiträge 52 (2004)
REFERENCES Author's address: Gerhard Uhmann, Tannenhofstr.
Heberdey, R. (1942): Revision der paläarktischen Arten 10, D-92690 Pressath, Germany, phone ++49 9644-513
der Gattung Mecynotarsiis LaFerté. Mitteilungen der
Received: 29.10.2002
Münchner Entomologischen Gesellschaft 32: 445-485.
La Ferié SÉNECTÉRE, F. T. de (1849): Livraison 4, in Gu- Accepted: 31.03.2003
Érin-Meneville, f. E. Species et iconographie généri- Corresponding editor: M. Schmitt
que des animaux articulés. Félix Edouard, Paris (1826-
1849).
Bonner zoologische Beiträge Band 52 (2004) Heft 1/2 Seiten 3-32 Bonn, August 2004
Aquatic Dance Flies from a Small Himalayan Mountain Stream (Diptera:
Empididae: Hemerodromiinae, Trichopezinae and Clinocerinae)
Rüdiger Wagner", Florian Leese" & Arne Rai PANESAR-'
" Limnologische Fluss-Station Schlitz der MPG, Germany
'* Freiburg im Breisgau, Germany
Abstract: For the first time an emergence trap was permanently run for almost two years over a Himalayan stream
(Kullu Valley, SW-Himalayas, Himachal Pradesh, India). The area is situated in monsoon climate. We report the results
of the emergence of aquatic dance flies (Empididae: Hemerodromiinae, Trichopezinae and Clinocerinae). Forty-nine
taxa were distinguished, and thirty-three were determined to species level; seventeen species were new to science. In
Hemerodromiinae four new species ofthe genus Hemewdromia Meigen, 1822, and ten of Chelifera Macquart, 1823,
were found over approx. 5 m- ofstream surface. One species oíHeleodromia Haliday, 1833, subfamily Trichopezinae,
was new. In Clinocerinae, two species ofDolichocephalu Macquart. 1823, three ofRoederiodes Coquillett, 1901, seven
ofClinocera Meigen, 1803 and one ofTrichoclinocera Collin, 1941, were new to science. Species and specimen num-
ber of Clinocerinae, particularly Wiedemannia glaucescem (Brunetti 1917), were highest at high precipitation;
Hemerodromiinaewere more abundantduringthedry periods. Species richness is remarkably high, compared with stud-
ies on European or North American streams. Probably many endemics exist. Morphological similarity of several Cli-
nocera species indicates intense speciation processes. Species richness may further depend on the position ofthe Hima-
layas between the Palaearctic and the Oriental region, and the vicinity ofclimatic zones along the different elevations
and slopes of the mountain chains. Provisional keys for the genera Chelifera. Hemerodromia, Heleodromia and Cli-
noceraare provided.
Key words: Himalaya, stream, aquatic Empididae, new species, emergence patterns, environmental variables, species
richness. Oriental Region.
1. INTRODUCTION The current publication deals with a family of aquatic
Research on running waters mainly yields data from Diptera, the dance flies or Empididae. The family in the
new sense (Chvála 1983) includes the subfamilies
streams and rivers in the industrialised "western" world.
Empidinae, Hemerodrominae and Clinocerinae. Only
Data on biodiversity and ecology ofstreams in Asia are
comparatively rare (DUDGEON 1982, 2000a, 2000b). the last two groups almost exclusively include species
with larval development in aquatic habitats. Information
The elucidation ofthe biodiversity ofa inountain brook
on these groups from the Indian subcontinent or
is a task for which the best methodology is the collec- neighbouring regions are rare (Grootaert et al. 2000,
tion ofadult aquatic insects with emergence traps in ad-
HORVAT 2002, Sinclair 1994, Smith 1965, 1975,
dition to benthos samples and life cycle studies. Such Vaillant 1960, Wagner 1983, Yang & Yang 1988,
data were gained for a Himalayan stream in the Kullu-
1995 a,b).
Valley (SW-Himalayas, Himachal Pradesh, India) dur-
ing an Indo-German Project 1994-1999 (Panesar 1998)
THE STUDY SITE
2.
and during a study supported by the Indian Ministry for
Human Resource Development, which concentrated on The study site is situated in the Kullu Valley (Fig. 1),
a caddis fly species (KAISER 1999). Both projects were province Himachal Pradesh, North-West India about
aimed for the development of a bio-monitoring method 450 km N of Delhi that extends some 70 km from Ba-
for the assessment ofwater quality in India and showed jaura in the south to the Manali area in the north with
the severe need for ecological data on macro- the Beas River a tributary ofthe famous Indian Ganges
zoobenthos organisms at the species level (Panesar as a central axis and focus (31°27'N, 76°56'E /
1995). To get such information for long-term studies the 31°26'N, 77°52'E). The Upper Beas basin is encircled
material was given to experts and results are expected to by high Himalayan ranges up to 6,500 m, and thus its
be published subsequently for the different groups. To microclimate is characterised by a cool, snowy winter,
and a relatively wann, wet monsoon summer.
date, only smaller parts of the data are published
(Stauder 2000, Panesar in press), or have been in- The morphology of the Kullu Valley has been formed
cluded in Project Reports (e. g. Panesar 1998). by glaciation with a broad, U-shaped cross-sectional
4 Bonnerzoologische Beiträge 52 (2004)
Fig. 1. The upper Kullu Valley south ofNaggar with the Beas River (photo by O. Kaiser).
MATERIALS & METHODS
profile. Elevation of the valley bottom at Manali is 3.
approx. 2,000 m, and at Kullu 1,200 m. Aquatic insects were collected in an emergence trap (Mar-
ten & ZwiCK 1999) covering an area ofapprox 5 m^ ofthe
The Naggar Nala is a first order stream originating at
2,600 m and flows into the Beas River after about 4 km NaggarNala (nala=stream. Fig. 2).
at 1,420 m. The sampling site is situated south of the The trap was emptied daily and specimens were preserved
village Naggar at the border between forest and mead- in 10% formalin. The material worked out for the present
owland at 1,900 m. publication was collected between July 1996 and Decem-
ber 1997. Samples were taken by A. Stauder and A. R.
The drainage area upstream from the study site is ap- Panesar (Stauder 2000) and by O. Kaiser (Kaiser
proximately 3.5 km". Mean stream discharge was 1999).
about 20 1 sec"', and stream width 1.2 - 1.5 m. The
slope is low in the area near the study site and the As precipitation varies strongly even between small areas
stream sediment is dominated by gravel up to 20 cm in in the study area the daily rainfall and data on water and
diameter. Conductivity was 160-230 [iS cm ' with de- air temperatures were measured next to the sampling
site.
creasing values during periods of high discharge fol-
lowing rainfalls. Most species ofaquatic Empididae (subfamilies Hemero-
dromiinae, Trichopezinae and Clinocerinae) discussed be-
Fifty percent of the annual precipitation at Naggar
(about 1,200 mm) falls during the summer monsoon in sloewumareKoneenwig,to Bsocinenn,ce.GeHromloatnyypes(ZaFrMeKd)e.posIifteadvaiinlaMblue-,
July, August and September (SiNGH 1989). The tree line paratypes are deposited at the Zoological Survey ofIndia,
in the Upper Beas watershed is at about 3,500 m. The New Alipore, Calcutta, India (NZSI), and the Naturhis-
landscape below is dominated by mixed deciduous co- torisches Museum Basel, Switzerland (NHMB). The re-
niferous forest, interspersed with meadows, grading into maining material is in the collection of the senior author
extensive areas of Himalayan coniferous forest at lower at the Limnologische Fluss-Station Schlitz, Germany
elevations. On the lower valley slopes, this forest type (LESS).
changes into small pockets of temperate forests and
Species descriptions in Clinocerinae in particular refer to
large agriculturally dominated areas, mainly fodder pro-
number of bristles and the following abbreviations are
duction, orchards, horticulture, grain and, at lower ele-
used: oc=ocellar bristles; poc=post-ocellar bristles;
vations, rice cuhivation. Characteristic for the agricul- pb=pronotum bristles; dc=dorsocentral bristles; ac=ac-
tural system ofthe Kullu Valley are small-scaled terrace rostichial bristles. All bristles occur in pairs on the left and
cultivation and household agricultural land holdings in right part ofthe body, i.e. 5 dc means 5 pairs ofdorsocen-
the form of discrete parcels within the village area tral bristles. Terminology of male genitalia follows SIN-
(Singh 1998). CLAIR (2000).
Wagner, Leese & Panesar: Himalayan dance flies (Empididae) 5
Fig. 2. Emergencetrap atNaggarNala during the summermonsoon (photo by A. Stauder).
TAXONOMY
4. Chelifera multiseta group
Subfamily Hemerodromiinae The Chelifera multiseta group includes species with a
dark brown head, and a light brown to brown thorax;
Genus Chelifera Macquart, 1823 stigma faint, more or less elongate. The group contains
Type-species: Chelifera raptor Macquart (by mono- Chelifera multiseta, C. multisetoides, and C. insueta. C.
typy) malickyi, recently described from Thailand (HORVAT
2002), is a close relative of this group due to thorax
Chelifera contains species with raptorial front legs,
colouration and the shape ofmale genitalia.
wing with discal cell, i.e. two cross-veins between M1+2
and M3. Smith (1965) recorded only a single female Chelifera insueta Wagner & Leese sp. nov. (Figs 3-7)
from Nepal; all species collected on the Naggar stream
were new. Key to Himalayan species in Appendix I. M0a6t.e0r6i.a1l9.97H(oNlZoStIy)p;e:1,^\0S2.0275..10969.719(9N7HM(BZ)M;FKf)u;rthePrarmaattyepreisa:l: 2\$S
In the West-Palearctic, Chelifera species groups may be 02.07.1997; 1$ 05.07.1997; 3? 07.07.1997; 2$ 08.07.1997; 1?
distinguished by means ofbody colouration, possession 10.07.1997; 1$ 12.07.1997; 12 21.10.1997 (LFSS).
and number of mesonotal stripes, and presence or ab- Description. Male. Head with yellow antenna and
sence of a stigma. These were valuable features for the mouth parts. Thorax light brown, mesonotum with pair
Himalayan species as well. We distinguished the fol- of lateral longitudinal brown streaks. Scutellum light
lowing species groups: brown, metanotum dark brown. Legs yellow, all tarsi
with segments 4 and 5 blackish, more distinct in middle
Chelifera multiseta group, Chelifera rhombicerca group,
and some unassigned species (incertae sedis). Four un- and hind tarsi. Middle tibia with about 17 elongate ven-
tral setae. Abdominal tergites brown, stemites clear.
described species were represented by females only and
could not be positively assigned to males. Genitalia. Hypandrium elongate, slightly bent, with
caudal tip. Postgonite broad elongate, with long subapi-
cal horizontal appendage bearing short distal hook. Hy-
6 Bonnerzoologische Beiträge 52 (2004)
Figs. 3-7. Chelifera insiieta sp. nov.: 3. genitalia, lateral view; 4. epandrium and cercus, inner view; 5. hypandrium and phallus,
lateral view; 6. tip offemale abdomen, lateral view; 7. tip offemale abdomen, dorsal view.
pandrial process absent. Sheath of phallus is broad. Derivatio nominis. From insuetus (latin=unusual), con-
Phallus upright, distal portion covered by numerous cerning the shape ofmale and female genitalia.
short spines. Epandrium elongate, basally quadrate,
Relations and remarlas. It is difficult to decide whether
thinner in distal half, with 5 elongate bristles on inner
males and females belong to the same species, but the
tip. Cercus rhomboid, basal and anterodorsal margins
abundance and amount ofspecimens ofboth sexes made
smooth, posterodorsal margin irregularly serrate. Distal
side with U-shaped incision, internally at tips of U with it most probable for this species. The shape ofthe post-
gonite is unique, especially its elongate distal appendage
strong short setae.
and the construction ofthe phallus. In females the distal
Female. Colour pattern of head and thorax as in male. part ofthe abdomen with a broad dorsal 'plate' and the
Middle tibia without elongate ventral bristles. Abdomi- elastic elongate ventral appendage is unusual. It is simi-
nal tergites brown with some lighter circular spots, ster- lar to the female of Chelifera spec. 3, which differs in
nites clear. Genitalia unique. Last abdominal segment thoracic colouration.
uniformly brown, with white ventral, hook-shaped ap-
pendage (Figs 5-6, compare female ofspec 3). Chelifera miiltiseta Wagner & Leese sp. nov.
(Figs 8-11)
Measurements. Body length S 4.8-5.5 mm, $ 3.8-5.0 Material. Holotype: \S 14.10.1996 (ZFMK); Paratype: \S
mm. Wing length <S 4.2-4.9 mm, $ 3.7-4.9 mm. 24.04.1998 (NZSI); further material: 1V 24.10.1996 (ZMFK).
Wagner, Leese & Panesar: Himalayan dance flies (Empididae) 7
Description. Head dark brown, eye red, antenna and Derivatio nominis. In general morphology, this species
mouth parts yellow. Thorax light brown, mesonotum is very similar to C. multiseta.
with pair of longitudinal brown streaks, increasing in
width towards scutellum; streaks join before scutelium Chelifera rhombicerciis group
to form U-shaped pattern. Scutellum light brown, Chelifera rhombicerciis group species have a dark brown
metanotum dark brown. Front legs entirely yellow,
head and thorax (mesonotum at least), a distinct black
middle and hind legs yellow with tarsal segments 3-5 stigma, antenna and mouth parts are yellow. Taxa in-
blackish. Abdominal tergites dark brown, stemites
cluded are Chelifera rhombicerus, C. stauderae, C. ciir-
translucent.
vata and four undescribed species, which were re-
Male genitalia. Hypandrium with blunt tip and 2 dorsal presented by females only and could not be positively
prolongations, anterior postgonite thin, elongate and associated with males. The recently described C. orna-
slightly bent, distal hypandrial process shorter and menta (China, Sichuan) (HORVAT 2002), is more -
straight, about 1/3 length ofthe postgonite. Phallus up- distantly related to this group due to the lack of a
right, just before flagellum with corona ofblack spines. stigma.
Epandrium elongate, distally curved dorsally, inner side
near apex with approx. 10 strong uniserial setae. Cercus Chelifera curvata Wagner & Leese sp. nov.
rhomboid in lateral view, inner side along dorsal margin (Figs 16-17)
with irregular row ofstrong setae. In dorsal view cercus Material. Holotype: 1;" 16.10.1997 (ZFMK); Paratype: 16"
slightly bent, setae clearly visible to tip ofcercus. 13.10.1997 (NZSI).
Measurements. Body length S 3.2-4.0 mm, $ 2.7 mm Description. Male. Head black, antenna and mouth
.
Wing length S 3.3-4.3 mm, $ .3.2 mm parts pale yellow. Thorax blackish brown, mesonotum
shining, paler on distal third. Legs yellow, middle and
Derivatio nominis. Derived from the large number of
hind legs with 3 terminal tarsal segments blackish. Mid-
setae on the inner side ofcercus. dle tibia ventrally with row of 13 stronger setae. Ab-
dominal tergites dark brown, tergites Vll with U-shaped
Chelifera multisetoides Wagner & Leese sp. nov. pattern, tergite VIII translucent; stemites I ~ V translu-
(Figs 12-15) cent, stemites I to VI translucent, VII slightly pig-
mented, VIII with thin anterior streak.
Material. Holotype: \S 18.09.1996 (ZFMK); Paratype: 16"
31.03.1997 (NZSI). Genitalia. Black, hypandrium almost straight, distally
Description. Male. Head black, antenna and mouth thinner, with blunt tip, and basally with thin gonocoxal
parts yellow. Mesonotum with pair ofbroad, laterally ir- apodemes. Dorsal prolongations of hypandrium and
regular brown streaks. Scutellum light brown, metano- phallus not visible. Epandrium evenly arched, with 1
tum dark brown. Front legs entirely yellow, middle and strong seta on distal inner end, and few long setae along
hind legs yellow with tarsal segments 4 and 5 black, 3"* lower margin. Cercus evenly curved along lower mar-
segment basally yellow, distally dark. Abdominal ter- gin. Dorsal margin sinuous, distal margin short truncate
gites dark brown, sternites translucent, clear. with 3 strong teeth, on upper and lower ends, and inner
ventral prolongation. In dorsal view basal halfof cereal
Genitalia. Hypandrium with blunt tip and 2 dorsal pro- lamellae almost parallel, more distally strongly diver-
longations; anterior postgonite thin, elongate and gent with 2 spines.
strongly bent, distal hypandrial process broad and half
as long as postgonite. Phallus upright,just before flagel- Measurements. Body length 4.3-5.8 mm. Wing length
lum with corona of black setae. Epandrium elongate 3.7-4.5 mm.
sickle-shaped, distally on inner side near apex with Derivatio nominis. The strongly curved dorsal margin
approx. 6-8 strong uniserial setae. Cercus rectangular in
ofthe cercus is characteristic.
lateral view, with row of strong setae on inner side
along dorsal margin, that distally covers uppermost tip. Chelifera rhombicercus Wagner & Leese sp. nov.
In dorsal view cercus bent, setae clearly visible to tip of
(Figs 18-19)
cercus.
Material. Holotype: \S 27.08.1996 (ZFMK).
Measurements. Body length 4.1-4.2 mm. Wing length
Description. Male. Head black, antenna and mouth
3.2 mm.
parts pale yellow. Thorax dark brown, mesonotum paler
Relations. C. multiseta and C. multisetoides are close on distal third. Legs yellow, middle and hind legs with 3
relatives, they can be clearly distinguished by the shape tenninal tarsal segments blackish. Middle tibia ventrally
ofthe epandrium, the prolongations ofthe hypandrium, with row of approx. 20 stronger setae. Abdominal ter-
and the shape and pattern ofthe setae on the cercus. gites dark brown, colour pattern of tergites VI to VIII
8 Bonner zoologische Beiträge 52 (2004)
Figs. 8-11. Chelifera midtiseta sp. nov.: 8. genitalia, lateral view; 9. cercus and tip ofepandrium, innerview; 10. hypandrium and
phallus, lateral view; 11. cerci, dorsal view. Figs. 12-15. Chelifera multisetoitles sp. nov.: 12. genitalia, lateral view; 13. cercus
and tip ofepandrium, inner view; 14. cerci, dorsal view; 15. hypandrium and phallus, lateral view, [h - hypandrium; pog - post-
gonite; ph -phallus; h.p. -hypandrial process].
U-shaped; sternites I - V translucent, sternites VI - VIII Chelifera stauderae Wagner & Leese sp. nov.
brownish along anterior margin. (Figs 20-21)
Genitalia. Hypandrium slightly rounded and narrow, Material. Holotype: \S 25.09.1996 (ZFMK).
with blunt tip, basally with elongate gonocoxal apode- Description. Male. Head black, antenna and mouth
mes. Dorsal prolongations of hypandrium and phallus parts pale yellow. Thorax uniformly blackish brown,
not visible. Epandrium slightly bent, roughly triangular, mesonotum paler in caudal third, scutellum just as pale.
no setae detected on distal end. Cercus large, rhomboid Legs yellow, middle and hind legs with tarsal segments
3-5
in lateral view, with 3 strong teeth on upper and lower blackish. Middle tibia ventrally with row of
ends ofdistal margin and inner ventral prolongation. In approx. 17 stronger setae. Abdominal tergites dark
dorsal view basal halfofcereal lamellae run almost par- brown, colour pattern of tergites VI and VII U-shaped;
allel, then widely divergent with basal and distal spines. sternites - V translucent, sternites VI - VIII brownish
I
Measurements. Body length 5.8 mm. Wing length 4.8 along anterior margin.
mm.
Genitalia. Hypandrium narrowed distally with short up-
Derivatio nominis. Derived from the large, rhomboid right tip, on both sides with elongate horizontal gono-
coxal apodemes. Dorsal prolongations of hypandrium
cercus in lateral view.
Wagner, Leese & Panesar: Himalayan dance flies (Empididae) 9
Figs. 16-17. Chelifera ciinxita sp. nov.; 16. genitalia, lateral view; 17. cerci, dorsal view. Figs. 18-19. Cbelifera rhonihicerca sp.
nov.: 18. genitalia, lateral view; 19. cerci, dorsal view. Figs. 20-21. Chelifera staiideme sp. nov.: 20. genitalia, lateral view; 21.
cerci, dorsal view.
not detected. Phallus not visible due to heavy sclerotiza- Chelifera spec. 1
tion and pigmentation of epandrium and cerci, ejacula- Material. If 24.09.1996; 1$ 28.09.1996 (LFSS).
tory apódeme strongly bent ventrally. Epandrium almost
Description. Female. Head black, eyes black, shining
rectangular, only apicodorsal portion prolonged. Cercus
irregularly shaped, in lateral view lower portion rounded reddish in light. Antenna and mouth parts yellow. Tho-
with dorsal margin sinuous; upper distal margin almost rax entirely black. Wing with stigma. Legs pale yellow,
straight. In dorsal view, inner margin of basal half of 2 terminal tarsal segments brown. Tergites I - VI and
cereal lamellae run nearly parallel; beyond mid length basal halfoftergite VII brown, tergite VIII brown.
inner margin almost circular with strong spines, and dis- Measurements. Body length 5.0-5.2 mm. Wing length
tally with further widening and further pair ofspines. 4.6-4.8 mm.
Measurements. Body length 5.5 mm. Wing length 4.5
mm. Chelifera spec. 2
Material. 1$ 10.09.1996; 1? 11.09.1996; 1$ 15.10.1996; 1?
Derivado nominis. Dedicated to Dipl.-Biol. A. Stauder 16.10.1996; 1$ 18.10.1996; 2 ? 02.11.1996; 1$ 05.11.1996; 1$
a collaborator ofthe project. She is working on mayflies. 16.10.1997 (LFSS).
Relations. Chelifera rhombicercas, C. stauderae and C. Description. Female. Head black, eyes red, antenna
ciirvata are close relatives. The shape ofthe epandrium, and mouth parts yellow. Wing with stigma. Front legs
elongate gonocoxal apodemes, and the shape and pat- entirely yellow, middle and hind legs yellow with tarsal
tern of the setae on the cerci clearly distinguish the segments 4 and 5 dark brown. Abdominal tergites dark
males. Probably some of the females mentioned below brown, sternites translucent. Last abdominal segment
belong to one of these species, however, we could not uniformly black, with ventral hook-like appendage aris-
attribute them to males without any doubt. ing from basal halfoflast segment.
.
10 Bonner zoologische Beiträge 52 (2004)
Measurements. Body length 5.1-6.3 mm. Wing length Measurements. Body length4.0mm. Wing length4.0mm.
4.3-6.3 mm.
Derivatio nominis. The species fits (accommodates),
Relations. The senior author noted similar construction however with some doubt, into the C. rhombicercus
of the female abdominal tip in some East African species group.
Hemerodromiinae of the genus Drymodromia Becker.
Relations. This species is probably a close relative of
Probably this is based on the different generic rank, an
Chelifera stauderae, C. rhombicercus, and C. curvata,
adaptation to some similar ecological demands (egg
but readily distinguished by the shape ofthe epandrium
deposition habitat).
and its two large inner setae.
Chelifera spec. 3 Chelifera brevidigitata Wagner & Leese sp. nov.
Material. IV 13.05.1997 (LFSS) (Figs 24-26)
Description. Female. Head dark brown, eyes dark. An- Material. Holotype: !(? 16.11.1997 (ZFMK).
tenna and mouth parts yellow. Thorax laterally brown, Description. Male. Head dark brown, mouth parts and
dorsally with broad median dark brown streak all over antenna brownish yellow, terminal antennal segment
thorax. Wing with stigma. Legs pale yellow, with 2 ter- darker. Thorax shining red brown. No colour pattern on
minal tarsal segments brown. Tergites brown, abdomi- thorax, specimen partly destroyed. Wing with brown
nal stemites whitish. Tip ofabdomen black. stigma, veins intensively coloured. Legs orange yellow,
Measurements. Body length 5.5 mm. Wing length4.0mm. segments 4 and 5 of middle and hind tarsi darker. Ab-
dominal tergites brown.
Chelifera spec. 4 Genitalia. Hypandrium elongate, slightly bent dorsally,
Material. 12 25.1 1.1997 (LFSS) dorsal prolongations not seen. Epandrium slightly bent,
.
without prominent setae. Cercus with dorsal margin
Description. Female. Head black, eyes black. Antenna
slightly bent, distally on inner side with irregular rows
and mouth parts yellow. Thorax uniformly black. Wing
ofshort setae; front and lower margin almost straight. In
with stigma. Legs pale yellow, tarsal segments 4 and 5
dorsal view median portions of cereal lamellae slightly
brown. Tergites I - III brown, tergites IV - VIII with V- overlap, distally forming small circular incision.
shaped white pattern in distal part oftergites, increasing
in size caudally, abdominal sternites clear. Measurements. Body length4.0mm. Wing length4.4 mm.
Measurements. Body length4.3 mm. Wing length4.0mm. Derivatio nominis. Name is derived from the short ven-
tral prolongation ofthe cerci.
Species incertae sedis Relations. The narrow hypandrium is superficially
similar to C. haeselbarthae, however, body colouration
Chelifera accomodata Wagner & Leese sp. nov. and shape of remaining parts of the genitalia do not
(Figs 22-23)
support this assumption.
Material. Holotype Ir? 05. 06.1997 (ZFMK).
Description. Male. The only specimen is in poor condi- Chelifera digitata Wagner & Leese sp. nov.
tion, so that some features were not explicitly observed. (Figs 27-29)
Head brown, antenna and mouth parts yellow. Thorax Material. Holotype: \S 09.07.1997 (ZFMK); Paratype: \S
uniformly brown. No stigma. Legs yellow, middle and 18.06.1997 (NZSi).
hind legs with 2 terminal tarsal segments blackish. Mid- Description. Male. Head brown, antenna and mouth
dle tibia ventrally with row of 13 long dark setae. Ab- parts pale yellow. Thorax pale brown. Mesonotum with
dominal tergites brown, sternites translucent. pair of lateral brown streaks. Scutellum and metanotum
brown. No stigma. Legs pale yellow, distal tarsal seg-
Genitalia. Brown, hypandrium elongate rectangular, no
ments darker. Middle tibia in basal half with row of
projecting apodemes, dorsal prolongations not observed.
about 13 long dark setae. Abdominal tergites brown,
Epandrium L-shaped, setose, with one strong seta on
remaining tergites and sternites clear.
distal inner end, and another medially along dorsal mar-
gin, visible only in inner view. Cercus evenly curved Genitalia. Hypandrium short triangular, with 2 dorsal
along dorsal margin, apex strongly attenuated forming prolongations, postgonite strong and S-shaped, distal
small short tip with strong seta. Front ventral almost hypandrial process short and straight. Phallus upright,
straight, lower margin slightly sinuous, distal margin not fully extruded, distally with few short spines. Epan-
short and straight. Inner view of cercus with 3 strong drium basally broad, distally thinner and strongly bent
spines along distal margin, and long seta opposite me- dorsally, tip with one long inner seta. Cercus roughly
dian seta ofepandrium. triangular, basal and distal margins almost straight, dor-