Onchopelma Hesse

Evenhuis, Neal L., 2002, Review of the genus Onchopelma Hesse, with descriptions of new species (Diptera: Mythicomyiidae), Zootaxa 64, pp. 1-12 : 3

Key to the species of Onchopelma Hesse

1. Males; eyes holoptic; mesonotum and scutellum almost entirely black to brown........ 2

­ Females; eyes dichoptic; mesonotum and scutellum with yellow; mesonotum with conspicuous patterning.................................................................................................. 3

2. Hind basitarsus with basal hook; abdominal tergites black with yellow fasciae posteriorly ........................................................................................................... pulchellum Hesse

­ Hind basitarsus without basal hook; abdominal tergites IV­VII with black restricted to medial and lateral spots ( Fig. 1 )................................. brevifasciatum Evenhuis , sp. n.

3. Mesonotum without admedian pale vittae ( Fig. 6 ); occiput with small white spot immediately posterior to ocellar tubercle ( Fig. 6 )................. nitidum Evenhuis , sp. n.

­ Mesonotum with admedian vittae ..................... .......................................................... 4

4. Coxae black; black color of occiput extending laterally only slightly beyond with of median mesonotal vitta ( Fig. 8 ); first antennal flagellomere subequal in length to scape and pedicel........................................................................................ trilineatum Hesse

­ Coxae yellow; black color of occiput extending laterally well beyond width of mesonotalmedianvitta;firstantennalflagellomerelongerthanscapeandpedicelcombined ..................................................................................................................................... 5

5. Scutellum black on apical margin ( Fig. 7 ) ...................................... pulchellum Hesse

­ Scutellum all yellow, without black apically (some black may be present ventrolaterally in irwini , sp.n.) ..................................................................................................... 6

6. Mesonotal pattern with tear­drop shaped supra alar dark spot ( Figs. 2, 3 , 5 )............... 7

­ Mesonotum without supra alar spot ( Fig. 4 ) .................................... karooanum Hesse

7. Frons black on upper half or more ................................................................................ 8

­ Frons all yellow, black color extending from occiput ends at ocellar triangle ( Fig. 5 )... ................................................................................................... majus Evenhuis , sp.n.

8. Mesonotum with admedian dark vittae confluent with median vittae posteriorly ( Fig. 3 ); abdominal terga with black transverse bands on segments 1­7, segment 8 yellow ( Fig. 3 ); scutellum with small spot of black color ventrolaterally .................................. ................................................................................................... irwini Evenhuis , sp.n.

­ Mesonotum with admedian dark vittae separate from median vittae posteriorly ( Fig. 2 ); abdominal terga with black transverse bands on segments 1­3, black on remaining segments as medial spots and lateral black spots ( Fig. 2 ); scutellum completely yellow to white...................................................................... brevifasciatum Evenhuis , sp. n.

Figures

FIGURES 1 ­ 4. 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.

FIGURES 5 ­ 8. Onchopelma, dorsal view (wings removed), showing color pattern of head, thorax, and abdomen. 5. O. majus, sp. n. female. 6. O. nitidum, sp. n., female. 7. O. pulchellum Hesse, female allotype. 8. O. trilineatum Hesse, female paratype.