Malacophagomyia rivadavia
NEOTROPICAL - Argentina (San Juan)
Body length = 8.8 mm. Head length at antennal base 1.12 head length at vibrissal level. Parafacial and fronto-orbital plate with golden microtomentum, with a narrow strip of gray microtomentum near eye; parafacial plate with a few setulae on upper half; frontal vitta brownish; front at its narrowest point 0.23 head width; 7 frontal setae; outer vertical setae 0.3X the inner vertical and divergent; genal groove and genal dilation with golden microtomentum; 8 subvibrissal setae; antenna black, postpedicel black with grayish microtomentum, length 0.27 head height; palpus blackish with black setae on the apical half. Thorax. Scutellum with intermediate stripes with silvery-gray and one spot of golden microtomentum at posterior margin; postpronotal lobe, notopleuron and anepisternum with spots of yellowish-golden microtomentum; katepisternum and anepimeron with spots of silvery-gray microtomentum; Chaetotaxy: dorsocentrals 3–4 (not well differentiated) + 4 (spaced to four, the two anterior setae smaller than the posteriors), intra-alars 2+2 (anterior pair weak), supra-alars 1+3 (the middle pair stronger). Wing hyaline, tegula pale orange-brown, yellowish basicosta and dark brown veins, R1 basally setulose on 2/3 of its length, R4+5 setulose in proximal 0.8 of distance to crossvein r-m, Legs with middle femur with 2 anterior and 2 anteroventral setae; middle tibia with 2 anterdorsal setae; hind femur with rows of anterodorsal, anterior and anteroventral setae; hind tibia with a row of anterodorsal setae, 1 anteroventral seta, and 2 posterodorsal setae; middle and hind femora and tibiae somewhat villous; tarsi blackish. Abdomen. Black; sternites exposed with silvery microtomentum; T1+2–T5 dorsally with silvery microtomentum; T1+2–T4 with latero-ventral spots of silvery microtomentum; T5 with latero-ventral part reddish, with lateral spots of light golden microtomentum; ST2–ST3 with lateral setae; ST4 with tufts of black spine-like setae on posterior corners, bare medially; ST5 V-shaped, reddish-brown, arms of ST5 with tufts of strong black spine-like setae on its inner surface. Genitalia. Syntergosternite 7+8 black, with a median spot of golden microtomentum, having a marginal row of setae and some smaller black hair-like setae basally; epandrium reddish-orange with black hair-like setae; cerci densely villous, with cercal prong fused; cerci slightly curved forward in profile; surstyli black, broad and rounded, with villous setae; pregonite with sclerotized and bifid apex; postgonite somewhat long with one strong seta; phallus without vesica; juxta (or apical plate) well developed and sclerotized, curved upward in the anterior margin over the lateral styli (lateral view); lateral styli well developed and complex, composed of membranous lateral (outer) arms, and well sclerotized and long inner stylets; median stylus greatly elongated and curved in lateral view; harpes well differentiated and spatulate.
Unknown