REVIEW OF THE GENUS HEMERODROMIA MEIGEN (DIPTERA : EMPIDIDAE; HEMERODROMIINAE) OF AMERICA NORTH OF MEXICO

32 Pages·1998·9.3 MB·

by  J F Macdonald

PROC. ENTOMOL. SOC. WASH.
100(4). 1998, pp. 792-823
REVIEW OF THE GENUS HEMERODROMIA MEIGEN
(DIPTERA: EMPIDIDAE; HEMERODROMIINAE)
OF AMERICA NORTH OF MEXICO
John MacDonald
F.
Department of Entomology, Purdue University, W. Lafayette, IN 47907-1158, U.S.A.
(e-mail: [email protected]).
—
Abstract. The genus Hemerodromio is reviewed for America north of Mexico. A
general diagnosis and a modified description are presented for the genus and each of the
13 previously described species. Nine new species are described from America north of
Mexico: Hemerodromia burdicki, H. chelata, H. flexiformis, H. glabella, H. ligata, H.
loba, H. reclinata, H. sinclairi, and H. siibchelata. Designation of neotypes are made
for Hemerodromia empiformis (Say) and H. superstitiosa Say. Designation of lectotypes
are made for the following: H. captiis Coquillett; H. coleophora Melander; H. luinispe.x
Melander; H. jugiilator Melander: H. melanosomu Melander; H. steUaris Melander; H.
vates Melander; and, H. vittata Loew. Hemerodromia haruspex Melander 1947 is shown
to be a new synonym of H. melauosoma Melander 1947, H. rogatoris Coquillett 1895 a
new synonym of H. superstitiosa Say 1824, and H. vittata Loew 1862 a new synonym
of H. superstitiosa Say 1824. Previously known only from the Palearctic Region, H.
oratoria (Fallen) was found to be widely distributed in North America. Separate keys to
male and female adults, illustrations of male terminalia, and known distributions are pro-
vided.
Key Words. Diptera, Empididae, Hemerodromiinae, Hemerodromia, dance flies
Adult flies of the genus Hemerodromia Larvae and pupae of//f»;eroc?;Y>»»'rt spe-
Meigen (Empididae, Hemerodromiinae), cies are aquatic (Smith 1969), and larvae
like those of other genera in the subfamily, are reported to prey on black fly larvae (Pe-
are very small (ca. 2-4 mm), elongate, and terson 1960). Labels accompanying adults
possess raptorial forelegs. Their wings lack of Nearctic Hemerodromia suggest that
an anal lobe. Nearctic genera of Hemerod- they commonly are swept from riparian
romiinae have been reviewed by Melander vegetation and also taken in Malaise traps.
(1902, 1928, 1947). MacDonald (1988, Harper ( 1980) collected males and females
1989, 1993, 1994), and MacDonald and ofseveral spemces in emergence trapsplaced
rT^urner (1,«9^9-3.).. Scp*^ecies h.-ttmgJT t,he pt-resent ove-„pr.j^sgtrpreeasmesnt. sQ.tuuejdbyeci•s,liC-iamni.atdedja.t.o Huemer-
concept of Hemerodromm are found in ^^^^,,^^.^^ ^^^^.^^^ ^^ America north of Mex-
North America (Melander 1947), Europe ^^^ included are a general diagnosis and a
(Chvala and Wagner 1989), China (Yang modified description for the genus and each
and Yang 1990), India and Indonesia (Me- of the 13 previously described species, de-
lander 1928), Nepal (Smith 1965), South scriptions of nine new species, separate
Africa (Smith 1969), and South America keys to male and female adults, and known
(ColUn 1933, Smith 1967). distributions.
—
VOLUME 100. NUMBER 4 793
Materials and Methods Type species: Tachydromia oratoria Fal-
The present study was facilitated by the len 1816 (des. Coquillett 1902: 1).
—
existence of large number of Nearctic spec- Diagnosis. Adults of the genus Hem-
imens added to collections since Melander's erodromia are distinguished from those of
(1947) revision. The following institutions other genera of Hemerodromiinae in the
loaned the material upon which this work Nearctic Region primarily by reduced ve-
is based: American Museum of Natural nation, including the following: anal cell
History, New York (AMNH); California lacking; crossveins h and bm-cu lacking;
Academy of Sciences. San Francisco and, cells bm and dm confluent and ending
(CAS); Canadian National Collection, Ag- in the basal third of wing.
riculture Canada, Ottawa (CNC); Cornell Description. Hemerodromia species
University, Ithaca (CU); Clemson Univer- treated in this paper agree in general with
sity, South Carolina (CUSC); Florida State the generic description of Collin (1961),
Collection of Arthropods, Gainesville
with the following additions and modifica-
(FSCA); James Entomological Collection, tions. Body length exclusive of antennae
Washington State University (WSU); Illi- and including terminalia 2.0 to 4.0 mm.
nois Natural History Survey (INHS); Los Fore femur and fore tibia with 2 median
Angeles County Museum (LACM); Muse- rows of 14-20 black setulae ventrally;
um of Comparative Zoology, Harvard Uni- those of fore femur flanked by row of 5-8
versity (MCZ); Purdue University Ento- light brown bristles; those of fore tibia
mological Research Collection (PERC); weaker, more sharply pointed, and lacking
Snow Museum, University of Kansas, Law-
flanking bristles. Fore tibia with strong api-
rence (UKL); National Museum of Natural cal bristle. Prominent vestiture lacking on
History, Smithsonian Institution, Washing- mid and hind leg. Male terminalia including
ton D. C. (USNM); University of Califor- hypandrium, pair of epandrial lobes of dif-
nia, Riverside (UCR); University of Min- fering shape and vestiture, pair of cerci of
nesota, St. Paul (UMSP): Universite de differing shape and vestiture; phallus ofdif-
Montreal (UMC); University of New
fering shape and vestiture. Female "ovi-
Hampshire (UNH); and, Utah State Univer-
positor" of differing degrees of develop-
sity, Logan (USU). Specimens also came ment, formed from cerci and abdominal
sferroimestfhreomautHhaowra'siicoslelnetctbiyonD.(ME.ACH)ardayn.d a segImnefonrtmsal8 sapnedci9e.s groups.—Most Nearctic
The methods employed in this study
species treated here are placed in four in-
were reported in a review ofthe genus Clie-
formal species groups, the H. empiformis
lipocia Macquart (MacDonald 1993), in-
(Say) group, the H. captus Coquillett group,
cluding details of specimen preparation as the H. melanosoma Melander group, and
presented by Cumming (1992). Terminolo- the H. superstitiosa Say group. No phylo-
gy pertaining to vestiture is based on genetic analysis has demonstrated the
McAlpine (1981), but interpretation ofmale
monophyly of these groups, but their use
terminalia follows Cumming and Sinclair
herein facilitates presentations of species'
(1990).
diagnoses and descriptions.
Males of the H. empiformis group are
Genus Hemerodromio Meigen
characterized by distinctive epandrial lobes.
Hemerodromia Meigen 1822: 61. Type spe- Each is slender and straight basally, and
cies: Tachydromia oratoria Fallen 1816 then abruptly enlarged at or slightly beyond
(des. Rondani 1856: 148). the apical third. A row ofabout five to eight
Microdromia Bigot 1857: 557, 563 (as Mi- (one species possesses only two) strong
crodromya, later regarded as erroneous). setulae exist along the medial surface of
794 PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON
each epandrial lobe about midway and an informal species groups. Adults of H. stel-
another series of strong setulae exists along laris Melander and H. vates Melander most
the inner, dorsal surface. Differences in the resemble those of the H. empiformis group
general shape of the cerci, especially the in size and coloration, but male terminalia
apex, distinguish member species. Females lack the distinctive epandrial lobe. Hemer-
possess a well-developed ovipositor. The odromia sinclairi, newly described below,
group includes eight species in America is distinct fr—om all other species.
north of Mexico, H. brevifrons Melander, Remarks. Species of Hemerodromia
H. coleophora Melander, H. empiformis, H. are founded largely on terminalia characters
sufftexa Melander, and four new species de- of males and identification may require
scribed below. maceration of specimens. Preparation of
Males ofthe H. siiperstitiosa group share "good" specimens is difficult because mac-
a prominent basoventral process on each erating with lactic acid may not always pro-
fore femur, which bears an apical spine duce enough clearing of pigment to facili-
(Fig. 7). Immediately distal to this process tate study and clearing with 10% sodium
is an indentation for reception of an apical hydroxide must be done very carefully to
bristle of a corresponding fore tibia. Fe- prevent the disappearance of certain char-
males possess a well-developed ovipositor. acters. Storage of adequately cleared ter-
The group includes H. orotoria (Fallen), H. minalia in glycerin may result in additional
superstitiosa, and a new species described clearing so that the preparation virtually
below. The degree of development of the "disappears" in the microvial. Finally, dis-
basoventral process ofthe fore femur varies cerning certain characters associated with
among males of H. oratoria. being most terminalia, including vestiture and form of
strongly developed on specimens from the phallus, often is complicated because
northwestern North America. This structure their appearance may change substantially
is weakly developed or lacking on females with minor rotation of terminalia placed in
of H. oratoria. on microscope slides. For these reasons, the
Males of the H. caputs group possess key to male adults is based on coloration
cerci that are deeply excavated apically, re- and attributes of terminalia visible on intact
sulting in a very long dorsal and a corre- specimens when possible.
spondingly long ventral fork. Females pos- Development of a key to female adults
sess a well-developed ovipositor, but it is was accomplished only by employing col-
relatively shorter than that on females ofthe oration, relative body length from front of
H. empiformis group. The H. caputs group head (excluding antennae) to tip of ovipos-
treated here includes H. caputs. H. fibrina itor, and geographical distribution; females
Landry and Harper, and two new species of certain sympatric species appear to be
described below. indistinguishable. Two descriptive terms,
Adults of the H. melanosoma group are weakly developed and well developed, are
very small and nearly concolorous reddish applied to ovipositors in the discussion be-
black to black. Male terminalia include cer- low and in the diagnosis and description of
A
ci and epandrial lobes that are relatively each species. well-developed ovipositor,
very slender. The degree ofdevelopment of found on the majority of species, involves
the female ovipositor varies among includ- elongation and sclerotization of abdominal
ed species. The group as treated here in- segments eight and nine; it is shiny and
cludes H. chillcoui Harper, H. melanosoma, usually about twice as long as its diameter.
and one new species described below; H. A weakly developed ovipositor, found on
jitgulator Melander also appears to belong two species, involves little elongation and
to this group. almost no sclerotization of abdominal seg-
Three species are not placed in any ofthe ments eight and nine.
VOLUME NUMBER
lOO. 4 795
Key to Male Adults of Hemerodromia into dorsal groove on epandrial lobe (Fig. 9)
Meigen of America North of Mexico H. liiiata. n.sp.
- Cercus and epandrial lobe not forming inter-
1. Thoracic pleura concolorous yellow to yel- locking unit; cercus and epandrial lobeentire,
lowish gold, contrasting strongly with black each ending in slender, in-turnedprocess(Fig.
scutum; terminalia as in Fig. 1 10) H. siiperstitiosa Say
H.jugulator Melander 10. Thorax concolorous reddish black or black
- Thoracic pleura and lateral scutum concolor- (shiny reddish brown on teneral specimens) 1 1
ous brown. reddLsh brown, reddish black or - Thorax brown with darker brown median
black 2 stripe on scutum or nearly concolorous light
2. Legs light reddish black (except coxae and brown 13
femora bases yellow); terminalia as in Fig. 2 1 1. Abdominal tergum 7 yellow; cercus ending in
- Legs yellow (except distal 2 taHr.sosmienrcelsairdia.rkn. sp. - dAobwdno-mtiurnnaeld,telorbgeum(Fi7g.bIrIo)wn. .tHo.dcahrikllcborrroiwnH;arper
brown on two species) 3 cercus lacking down-turned lobe 12
3. Cercus deeply excavated apically (Figs. 3-6), 12. Scutum and mesopleuron pruinose. except for
ventral and dorsal lobes visible on unmacer- prominent denuded spot above mesocoxa;
ated specimens 4 apical halfofcercus narrowed; epandrial lobe
- Cercus not excavated apically 7 weakly concave dorsally in lateral view (Fig.
4. Thorax nearly concolorou.s reddish black or 12) H. )(lahelhi n. sp.
black .=; - Scutum shiny; mesopleuron pruinose, lacking
- Thorax brown or golden brown with areas of denuded spot above mesocoxa; cercus entire,
darker brown pigmentation 6 not narrowedapically;epandrial lobestrongly
5. Scutum with broad median stripe changing in concave dorsally in lateral view (Fig. 13) . .
pattern with rotation ofspecimens during ex- H. melanosoma Melander
amination underillumination; terminaliaas in 13. Cercus and epandrial lobe subequal in size
Fig. 3 H. suhchelala. n. sp. and shape in lateral view;apexofcercus lined
- Scutum lacking median stripe, dorsum not with 5-6 minute pointed processes (Fig. 14)
changing pattern with rotation of specimens H. stelluri.s Melander
during examination under illumination; ter- - Cercus and epandrial lobe differing in size
minalia as in Fig. 4 H. cuprus Coquillett andshape in lateral view;apexofcercuslack-
6. Mesopleuron and scutum nearly concolorous ing minute pointed processes (Figs. 15. 16) 14
brown (scutum may have thin darker stripe 14. Epandrial lobe broadly rectangular in lateral
medially); terminalia as in Fig. 5 view, except for apicoventral lobe; cercus
H. cheluia, n. sp. broadened and shallowly excavated apically
- Mmeessoopplleeuurroonn gaonlddesncubtruomwnnotvenctornaclollyorowuist;h - iEnpalnadtreriaallvlioebwe (sFtirga.p-l1i5k)e in. .latHe.ralorvuileowr,iaen(dFa-llen)
dark brown .stripe below notopleural suture; ing in 2, twisted apical processes; cercus nar-
scutum mostly dark brown; terminalia as in rowed apically and convoluted along dorsal
Fig. 6 H.fibrinci Landry and Harper margin in lateral view (Fig. 16)
7. Epandrial lobe not abruptly broadened api- H. vales Melander
cally in lateral view (Figs. 9-16) 8 15. Cercus bearing apicodorsal, prong-like pro-
- Epandrial lobe abruptly broadened at or be- cess that turns inward (Figs. 17, 18), usually
yond apical third in lateral view (Figs. 17-24) 15 discernibleon unmacerated specimens in dor-
8. Distal 2 tarsomeres of mid and hind leg dark solateral view 16
brown, contrasting strongly with basal tarso- - Cercus lacking apicodorsal. prong-like pro-
meres; basoventralprocesson fore femurwell cess 17
developed as a pointed projection, with deep 16. Apical setae on cercus long, projecting at
indentation for reception of apical bristle of least to apex of epandrial lobe; distal prong
fore tibia (Fig. 7) 9 on cercus ca. Vt length of cercus and some-
- Tarsomeres nearly concolorous yellow, distal whatjagged along ventromedial surface (Fig.
2 not contrasting strongly with basal tarso- 17) H. coleophora Melander
meres; basoventral process on fore femurnot - Distal setae on cercus short, not projecting to
developed (except on some specimens of H. apex ofepandrial lobe; distal prong on cercus
oratoria). with weakly developed indentation ca. '/) length ofcercus and smooth along ven-
on fore femur for reception of apical bristle tromedian surface (Fig. I8| .... H. loha. n. ,sp.
of fore tibia (Fig. 8) 10 17. Cercus more or less quadrate in lateral view,
9. Cercus and epandrial lobe forming interlock- apical margin nearly straight (Fig. 19) ....
ing unit, with ventral process ofcercus fitting H. siifflexu Melander
796 PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON
8
Figs. 1-13. Hemerodromia spp. 1-6, 9-1.3, male terminalia. 7-8, male fore femur. 1, H jiti^iiUitor. 2, H.
sinclairi. 3, 3a, H. suhchelata. 4, H. captus. 5. 5a, H. cheluta. 6, H.fihrina. 7. H. superstitiosa. 8,H. empiformis.
9, H. ligata. 10, H. superstitiosa. II, H. chillcotti. 12, H. glabella. 13, H. nielcinosoma. Abbreviations: abs 8 =
abdominal sternum eight: abt 8 = abdominal tergum eight; bvpf = basoventral process of fore femur; ce =
cercus; ep = epandrial lobe; hy = hypandrium. Scalebars = 0.25 mm. except0.5 forFigs. 7-8. Phallusomitted,
except for Fig. I. Figures ofall terminalia except Fig. 1 based on macerated specimens. Fig. 1 based on intact
male holotype.
VOLUME 100, NUMBER 4 797
- Cercus more or less triangular or rectangular contrasting strongly with yellow basal tarso-
in lateral view, apical margin broadly pointed 18 meres 9
18. Cercus broadly triangular in lateral view 8. Distributed in southern Texas and northern
(Figs. 20-22) 19 Mexico H. Iigata. n. sp.
- Cercus more or less rectangular over basal Vi - Distributed in eastern United States and
in lateral view (Figs. 23, 24) 21 southeastern Canada H. superstitiosa Say
19. Body length ca. 2.3 mm; epandrial lobe with 9. Color pattern ofscutum changing in intensity
2 setulae on medial .surface (Fig. 20) (visible with rotation under illumination
only on macerated terminalia) H. siihchelaui. n. sp.
H. hrevifrons Melander - Color pattern of scutum constant, not chang-
- Body length 2.8-4.0 mm: epandrial lobe with ing in intensity with rotation under illumina-
row of5-8 setulae on medial surface (visible tion 10
only on macerated terminalia 20 10. Mesopleuron golden brown with dark brown
20. Epandrial lobe with pointed,anterodorsalpro- stripe below notopleural suture
jection (Fig. 21) H. reclinata. n. sp. H.fibhna Landry and Harper
- Epandrial lobelackinganterodorsalprojection - Mesopleuron concolorous light brown to
(Fig. 22) H. empiformis Say brown, lacking darkerstripe below notopleur-
21. Cercus ending in short apicodor.sal process, al suture 11
less than '/n,lengthofcercus (Fig. 23) (clearly 1 1. Distributed east ofthe Mississippi River . . 12
visible on macerated terminalia) - Distributed west ofthe Mississippi River ... 13
H. hiirdicki. n sp. 12. Body length including ovipositor2.6-2.8 mm
- Cercus ending in long apicodorsal process, H. orautriu (Fallen); H. vales Melander
about 'A length of cercus (Fig. 24) (clearly - Body length includingovipositor3.2-3.5 mm
visible on macerated terminalia) H. empiformis Say; H. sufflexa Melander
H.jiexiformis. n. sp. 13. Body length including ovipositor2.8-3.4 mm
H. hunlicki,
Key to Female Adults of Hemerodromia n. sp., H. chclata. n. sp.. H. coleophora
Meigen of America North of Mexico Melander, H. Jiexiformis. n. sp., H. loha. n.
sp., H. reclinata. n. sp., H. sufflexa Melander
1. Scutum concolorous black or shiny reddish - Body length including ovipositor2.4-2.8 mm 14
brown to reddish black 2 14. Scutumconcolorousbrown,occasionally with
- Scutum brown with darker median stripe or thin, darker stripe along median
H
concolorous brown 7 (iratoria (Fallen)
2. Legs pale reddish black; body length includ- - Scutum brown laterally with broad, darker
- iLneggsovyieplolsoiwt;orbo3d.5y—l1e.n2gtmhminc.l.udHi.ngsoivncihpioisriit.orn. sp. 15. sStcruitpaelasltorinpgemgerdadiuaanlly broadening overapical 15
2.4-2.8 mm 3 Vr. distributed in southern Texas
3. Thoracic pleura yellowish gold, contrasting H. slellaris Melander
strongly with black scutum - Scutal stripe thin anteriorly, then abruptly
H.jugulator Melander broadened and uniform in width over poste-
- Thoracic pleura and scutum concolorous rior %: distributed from eastern California
black orshiny reddish brown to reddishblack 4 south into northern Mexico and southwestern
Texas H. hrevifrons Melander
4. Mesopleuron with denuded spot above me-
soco.xa H. glabella, n. sp.
- Mesopleuron lackingdenudedspotabove me- Hemerodromia hrevifrons Melander
socoxa 5 (Figs, 20, 29)
5. Scutum and thoracic pleura heavily pollinose
H. captus Coquillett Hemerodromia empiformis var. hrevifrons
- Scutum shiny, contrasting strongly with pol- Melander 1947: 248.
linose thoracic pleura 6 —
6. Abdominal tergum 7 yellow, contrasting with Diagnosis. This species belongs to the
brown abdominal tergum 6 H. empiformis group. Existence ofonly two
H. chillcorii Harper setulae on the inner surface of each epan-
- Abdominal tergum 7 and abdominal tergum 6
concolorous brown H milanosoma Melander drial lobe past its midpoint is diagnostic for
7. Distal 2 tarsomeres .da.rk brown, contrasting males of H. hrevifrons, but they are dis-
strongly with yellow basal tarsomeres 8 cernible only on macerated terminalia.
- Distal 2 tarsomeres light brownoryellow, not Adults are smaller in size compared to
798 PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON
Figs. 14-24. Hemerodromio spp., male terminalia. 14, H. stellaris. 15, H. oraloria. 16, H. votes. 17, H.
coleophora. 18, H. loha. 19. H. sufflexii. 20. H. hrevifrons. 21, H. reclinala. 22, H. empifonnis. 23, H. burdicki.
24, H.flexifomiis. Abbreviations: apce = apicodorsal process ofcercus; ce = cercus; ep = epandrial lobe; hy
= hypandrium; msep = medial setulae ofepandrium lobe. Scale bars = 0.25 mm. Figures based on macerated
specimens.
—
VOLUME 100, NUMBER 4 799
those of most species in the H. empifonnis area ofthe fore coxa ranging from partially
group, resembling those of H. stellahs and brown to completely black on some speci-
H. votes in size and coloration. Males of mens in concurrently collected series.
these three small, brownish species are dis-
Hemerodromia burdicki MacDonald,
tinguished by their terminalia, but females
new species
appear to be in—separable.
Description. Length including termina- (Figs. 23, 30)
—
lia of male ca. 2.3 mm, of female 2.4-2.5 Diagnosis. This species belongs to the
mm. General body color brown. Head: H. empifonnis group. Males of H. burdicki
black; antenna yellow. Thorax: pruinose; closely resemble those of H. flexiformis,
scutum golden brown with dark brown me- newly described below, with separation of
dian stripe; scutellum brown laterally, dark most specimens dependent on macerated
brown in center; postnotum dark brown; terminalia. The cercus on males of H. bur-
pleura golden brown. Fore femur lacking dicki possesses a very short apicodorsal
prominent basoventral process (see Fig. 8). process. In contrast, the cercus on males of
Abdomen: terga 1 and 7 yellow, remainder H. flexiformis possesses a much longer ap-
brown, sterna light brown. Male terminalia icodorsal process.
(Fig. 20) dark brown; cercus smoothly tri- Description. Male: Length including
angular in lateral view; epandrial lobe terminalia ca. 2.8 mm. General body color
abruptly expanded over apical Vs, two setu- brown. Head: black; antenna yellow. Tho-
lae on inner surface near midpoint. Female rax: pruinose; scutum and scutellum golden
similar to male; ovipositor w—ell developed. brown with dark brown median stripe; hu-
Type material examined. Holotype 6. meral area, scutellum and postnotum dark
labeled "San Diego Co/Desert Edge/Cal. brown; pleura brown. Fore femur lacking
Apr 14 -IS/M C VanDuzee" (USNM). The prominent basoventral process (see Fig. 8).
specimen is damaged, but the macerated Abdomen: terga 1 and 7 yellow, remainder
terminalia are intact and preserved in glyc- brown, sterna light brown. Terminalia (Fig.
erin in a microvial attached to the specimen 23): dark brown; cercus elongate in lateral
pin. The type locality in San Diego county view, ending in a blunt process ca. !/, or less
could not be established. the length ofcercus; epandrial lobe abruptly
—
Other specimens examined. MEXICO. expanded over apical Vi, with row of 4-6
Chihuahua: 1 <5, Camargo, May (CNC). setulae on inner surface past midpoint.
UNITED STATES. California; 17 S, 19 9, Female: Similar to male, except length
Riverside Co., 1000 Palms and Willis including terminalia ca. 3.3 mm; ovipositor
Palms Oasis, Feb-Apr; 1 S. Victorville, well developed.
May (CNC); 3 cJ, 1 9, 1000 Palms, Mar Type material.—HOLOTYPE 6, labeled
(LACM); 10 (5. 9 9, Mono Co., Fish •USA: UT; WAYNE CO./CAPITOL REEF
Slough, Jul (UCR). Texas: 7 6.1 9, Big NAT. R; PLEASANT CREEK/AUGUST
Bend Nat. Prk., May (CNC). 2-7, 1993/J. F MACDONALD" (USNM).
—
Distribution. Males are known from The specimen is in excellent condition and
eastern and southeastern California, Big some of the diagnostic features of termin-
Bend National Park, Texas, and northern alia are visible without maceration. The
Mexico (Fig.—29). type locality is in Capitol Reef National
Remarks. Distinctive male terminalia Park in south-central Utah. Allotype, same
support treatment as a separate species in data as holotype (USNM). Paratypes.
the H. empifonnis group. Variation exists in UNITED STATES. Arizona: 14 i. 25 9,
SW
the coloration of males possessing identical Cochise Co., Research Sta., W. Portal,
terminalia, with the central scutum, lower May-Jul (UCR, USNM); 1 d, Nogales,
aspects of thoracic pleura, and the central Jun; 13 (5,2 9 (1 pair in copula) Patagonia,
800 PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON
Jun (USNM). California: 12 cJ. 25 9, Fres- lia of male ca. 2.4 mm, of female ca. 2.7
no Co., Tollhouse, Sep; 7 6,1 9, Tulare mm. General body color concolorous dark
Co., Three Rivers, Jul-Aug; 1 6, Tulare reddish black or black. Head: black; anten-
Co., Farmersville, Jul (CNC, MAC); 2 i. na yellow. Thorax: densely pruinose; scu-
1 9, Sierra Nat. For., El Portal, Apr (CNC); tum, scutellum, postnotum and pleura dark
8 (?, 4 9, Stanislaus Co., Frank Raines Prk., reddish black or black. Legs yellow, con-
Sep (CAS); 3 S, Riverside Co., Cotton- trasting with thoracic pleura. Fore femur
wood Cyn., Jul (UCR). Idaho: 1 cJ, Frank- lacking prominent basoventral process (see
lin, Jul (USU). Utah: 30 d, 23 9, Wayne Fig. 8). Abdomen: tergum 7 yellow, terga
Co., Capitol Reef Nat. Prk., Aug (MAC, 1-6 brown; sterna yellowish. Male termin-
USNM, USU); 4 (5, 28 9, Washington Co., alia (Fig. 4): brownish black; cercus slen-
Beaver Dam Wash, Jun-Jul; 1 6, Temple- der, deeply excavated apically, ventral fork
ton, Jun (USU); 55 c5, 56 9, Washington more slender than dorsal fork. Female sim-
Co., Leeds Cyn.—, Jul-Sep. (USU). ilar to male; ovipositor well—developed.
Distribution. Males of this species are Type material examined. Lectotype fe-
known from southeastern Arizona, central male, here designated, labeled "4327/
and southern California, southern Utah and Demster/N.Y." (USNM; type no. 3151).
southeastern I—daho (Fig. 30). The label is difficult to read, with one word
Etymology. This species is named after being either "Demster" or perhaps "De-
Donald Burdick, my undergraduate mentor, mester"; if the former, the locality is New
to whom 1 owe my interest in insects and York, Oswego County, about 50 kilometers
who facilitated my early career in entomol- north of the city of Syracuse. The specimen
A
ogy- — is in excellent condition. lectotype is des-
Remarks. Males and females of this ignated because it is not possible to identify
species have been collected in Malaise traps a specific specimen as "type" from the
and aspirated from leaves of trees associ- publication alone. —
ated with permanent streams in Capitol Other specimens examined. CANADA.
Reef National Park in early August, and Ontario: 2 d, 2 9, Brockville, Aug; 1 9,
large series were collected in Malaise traps Orillia, Aug; 4 9, Ottawa, Jun-Jul; 2 9, St.
set by W. Hanson (Utah State University) Lawrence I. Prk., Aug (CNC); 26 d, 12 9,
in riparian zones in southwestern Utah from Orillia, Jul (USNM). Quebec: 1 <?, Gati-
July into September neau Prk., Jul (CNC). UNITED STATES.
16,5
Connecticut: 9, Waubamich, Jul
Hemerodromia captus Coquillett (USNM). Indiana: 2 6, Lafayette, Jul
(Figs. 4, 25) (USNM). Maine: 1 6,2 9, Kennebec Co.,
Hemerodromia captus Coquillett 1895: Wayne, Aug (MAC). Maryland: 4 d, 8 9,
Washington D. C. area, May-Sep (USNM).
391.
— Michigan: 3 6,3 9, Beulah, Jul; 1 9,
Diagnosis. Adults of H. captus are Brevport, Aug; 1 6, Cheboygan Co., Jul; 1
characterized by their uniformly blackish male, Monroe Co., May (USNM); 13 9,
body coloration together with dense prui- Emmett Co., Jul (UKL). New York: 2 9,
nescence, resulting in a matte thorax. The Demester; 2 6, \ 9, Oswego, Jul-Aug
latter attribute helps to distinguish H. cap- (USNM); 1 6, Oswego, Jul (INHS). Vir-
tus from H. chillcotti and H. melanosoma. ginia: 3 6, 1 9, Great Falls, Jun-July
the adults ofwhich have a denuded scutum. (USNM).
—
Adults ofH. captus lack the denuded, shiny Distribution. This species is known
spot on the mesopleuron that exists on those from the Great Lakes region east to the
of H. glabella, newly described below. mid-Atlantic seaboard and New England
—
Description. Length including termina- (Fig. 25).
VOLUME 100. NUMBER 4 801
O/
a
o
O;
"-r.
(O
,8p
(...
.^
/'
L.
—u-
•Hemerodronuacaplus
4-Hemerodromiachelaia
QHemerodromiafibnna
2<.Hemerodromiasuhchelala
V-
••- c.—\,
•\-.> ; -. P^
o
„- i;"'^-vv
Fig. 25. Distribution oiHeinerodnmua Lupliis, H. chelaia. H.fibnna. H. suhchelala.
—
Remarks. Males of H. captiis possess of the cercus appears to be distinct, based
terminalia that resemble those of H. bifiir- solely on the figure in Collin 1941 since the
ccilci Collin, described from Bikin in ex- type was not examined. The two species
treme eastern Russia. However, the shape also appear to differ in coloration, with the