Drapetis

Grootaert, Patrick & Shamshev, Igor, 2013, The flies of the family Hybotidae (Diptera, Empidoidea) collected during the Boyekoli Ebale Congo 2010 Expedition in Democratic Republic of Congo, Zootaxa 3603 (1), pp. 1-61 : 20

Drapetis sp.

Material examined. 1 Ƥ, D. R. CONGO, Kona , 26 May 2010, secondary forest, Mal. 4 (leg. P. Grootaert; MS name Drap4) ( RBINS).

Diagnosis. Female. Length: body 1.3 mm, wing 1.0 mm. Occiput black, subshining viewed dorsally; with black setation; inner verticals long, inclinate. Ocellars of different length, anterior pair short, inclinate and cruciate; posterior pair moderately long, lateroclinate. Antenna brownish; postpedicel with upper margin straight and lover margin convex; 2.0 times as long as wide; stylus subapical, long, 3.3 times as long as postpedicel. Palpus brownish. Thorax black, shining, with black setation. Prothoracic episterna without long upturned seta just above fore coxa, with several setulae on upper part. Postpronotal seta not prominent. Anepisternum (= mesopleuron) with some setulae on upper posterior corner. Mesonotum with acrostichals and dorsocentrals undifferentiated, scutum evenly covered with numerous setulae, 1 pair of prescutellars, long. Wing normally developed, hyaline. Costal bristle long, black. Costal index: 23/10/21. Vein R2+3 strongly curved. Veins R4+5 and M1+2 divergent near wing apex, both slightly bowed. Crossvein bm-cu transverse. Crossvein r-m beyond middle of cell bm. Halter brown. Legs robust with fore and hind femora and tibiae thickened; yellow, hind femur rather brownish yellow on about apical 2/3; tibiae lacking prominent bristles (except subapicals). Abdomen with tergite 1 almost entirely pale, other tergites well sclerotised, of subequal width, tergite 7 dark brown; tergites 3–4 with distinct squamiform setae laterally, tergite 5 with intermixed unmodified and slightly flattened setulae laterally; sternites subrectangular, undivided.

Remarks. Like D. yaekelaensis sp. nov. and D. hiatus , this undescribed species has a strongly curved vein R2+3. However, it differs from the former by tergites 3–4 bearing distinct squamiform setae (vs. tergites 4 and 5 in D. hiatus ) and can be distinguished from the latter by its brownish palpus (vs. yellow). So, this is likely an undescribed species. However, we consider that it would be premature to name it after a single female specimen.