Review of the genus Onchopelma Hesse, with descriptions of new species (Diptera: Mythicomyiidae) Author Evenhuis, Neal L. text Zootaxa 2002 64 1 12 journal article 41107 10.5281/zenodo.156142 5e22e18b-9a3b-4266-9b66-01f208799a4d 1175­5326 156142 Onchopelma brevifasciatum Evenhuis , sp.n. ( Figs. 1, 2 , 10 ) DIAGNOSIS. Males of this species are most similar to O. pulchellum , but can easily be separated from it by the absence of a hook on the hind basitarsus (present in pulchellum ). Females are most similar in appearance to O. majus , sp.n. but can be distinguished from that species by the presence of lateral black spots on the abdominal tergites (these spots absent in majus , sp.n. ) and the frons yellow to white on the lower half and black on the upper half (all yellow in majus , sp.n. ). FIGURES 1­4. Onchopelma , dorsal view (wings removed), showing color pattern of head, thorax, and abdomen. 1. O. brevifasciatum , sp.n. , male. 2. O. brevifasciatum , sp.n. , female. 3. O. irwini , sp.n. , female. 4. O. karooanum Hesse , female paratype. DESCRIPTION. Female . Length: 2.90–3.25 mm . Head ( Fig. 2 ) higher than long; eyes dichoptic, separated at vertex by 1.5 x distance between lateral ocelli; vertex black; occiput black dorsomedially, white ventrolaterally and ventrally, with sparse white hairs, densest laterally; frons white on lower half, black on upper half as extension of black color from vertex; face and tip of oral margin white; antenna with scape short, subtrapezoidal, yellow­white with some brown color dorsally; pedicel subrectangular, slightly longer than wide, brown; first flagellomere linear, length ca. 4 x than width, brown; second flagellomere linear­ovate, slightly shorter than first flagellomere, brown with small transparent apical style; proboscis brown, length slightly less than head length; labrum sclerotized, stiff, pointed apically; palpus not evident. Thorax . Mesonotum white with black patterning as in Fig. 2 , short sparse white hairs on humeral and prescutellar areas; pronotum black; scutellum white with sparse white hairs; pleura white except for black on katepisternum, meron, and mediotergite; coxae and legs white; halter stem and knob white. Wing . Hyaline; veins pale yellowish; costa ends slightly beyond end of R4+5; vein Sc incomplete; M1 and M2 evanescent toward wing margin; crossvein dm­cu closing cell dm absent; CuA1 closing anal cell before wing margin leaving stalk; stalk length slightly less than length of crossvein bm­cu; fringe of hair on posterior margin of wing in alular lobe and anal lobe areas sparse. Abdomen ( Fig. 2 ). White; tergites with black transverse bands on segments 1­3, black on remaining segments as medial spots and lateral black spots; tergites with sparse short white hairs dorsally, longer and denser laterally; venter yellowish white. Genitalia ( Fig. 10 ). Spermatheca unsclerotized, long, flared toward apex, reminiscent of the shape of some Nepenthes ; spermatheca with small basal bulb leading to apical duct; apical spermathecal duct very thin, transparent, length ca. 1.5 x length of spermatheca; sperm pump very short, with mushroom­shaped basal valve (sclerotized brown) and transparent flat, disc­shaped apical valve; basal duct short, slightly sclerotised brown. Male ( Fig. 1 ). Same as female except for the following: eyes holoptic; head and abdomen predominantly all black; thorax black except for yellow­white humeral areas (not evident in dorsal view). Types . Holotype male and one paratype female from: NAMIBIA [ OMARURU ]: Brandberg : Hungorob Valley , 1180 m , 21°11.40'S , 14°31.69'E , 05–16.iv.1999 , S. van Noort & S.G. Compton , yellow pan trap , bushy Karoo­Namib shrubland . NA99­Y90 ( NMNW ) . Other paratype : 1 female , KHORIXAS : Tweespruit 712 : Khoadi/Hôas D4 , 20°05'59"S 14°12'26"E , 25–28.v.2001 , E. Marais & A. Kirk­Spriggs , yellow pans ( NMNW ) . Holotype and paratypes deposited in NMNW . Holotype , one topotypic paratype , and the Khorixas paratype preserved in spirit. One Brandberg paratype used for dissection pinned on point; female genitalia preserved on slide no. 20020811­1. Etymology . The species epithet derives from the Latin brevis [= short] + fascia [= line] and refers to the relatively short black transverse stripes of the abdominal tergites in the female.