Ghorpade, K. (1994) Diagnostic keys to new and known genera and species of Indian subcontinent Syrphini (Diptera: Syrphidae). Colemania Insect Biosystematics 3, 15 pp.
Agnisyrphus angara Ghorpade
Dark species with abdominal terga 4 and 5 bright flame red in life. Vertical triangle much shorter than eye contiguity; basoflagellomere elongate, yellow with faint pale brown dorsal coloration, arista orange, dark at tip. Pleuron mostly dark, scutellar pile golden with dark tips. Profemur brownish on basal one-fourth or less; metatibia with indistinct subapical brownish annulus. Abdomen distinctly spatulate, posterior terga being wider than anterior ones; sterna brownish black.
Adapted from Ghorpade (in litt. from 2007).
Head: Vertical triangle black, golden yellow pollinose, specially behind ocelli, with golden yellow pile, and shorter than sutura of eyes. Eye bare, dorsal ommatidia enlarged, golden. Frons, face, gena and occiput a deep, brownish yellow; frontal pile golden with black tips, some frontal pile and that beside antennal bases short and black; rest of pile on face and gena yellow. Occiput white pollinose, white pilose, on dorsal one-fourth with sparser, thinner yellow pile. Antenna deep yellow, except basoflagellomere faintly pale brown dorsally, being elongate, thinnish, not rounded or oval; arista orange, becoming black at tip, longer than antenna.
Thorax: Scutum dull black, except rufous lateral margins, including calli; pile short, golden yellow, longer and rufous laterally. Pleuron dull black; dorsal katepisternum, anepimeron and katepimeron brownish yellow pollinose; pile yellow with a few thin, blackish hairs medially on anepimeron. Scutellum deep yellow, brownish medially; pile golden yellow. Wing: Hyaline, long, much longer than abdomen, pointed at apex which is feebly smoky; wholly microtrichose except bare as follows: extreme base of cell r1 (marginal cell), anterobasally on cells br and bm (first and second basal cells), posterior and anterior margins of cell cuP (anal cell) to a short distance; anal lobe with two bare strips. Calypter yellowish-grey with golden yellow fringe. Plumula pale yellow. Haltere with stem pale yellow, base and knob orange yellow. Legs: Procoxa deep yellow, meso- and metacoxa brownish. Profemur brownish on basal one-fourth or less, rest deep yellow, brownish black pilose; mesofemur with basal one-third brownish, rest deep yellow, pile brownish black; metafemur brownish black except yellow apical one-fourth, apical one-half with short yellow pile, basal one-half with long black pile; tibiae yellow, yellow pilose; metatibia with indistinct, brownish, postmedian (subapical) annulus. Tarsi yellow with slight brownish tinge.
Abdomen: Brownish black, flat, spatulate in shape, margined. Tergum 3 with submarginal, anterior, reddish yellow fascia, not reaching lateral margins; posterior two-third of tergum 4 and whole of tergum 5 reddish yellow (burning coal red in living specimen). Pile on terga all golden yellow; short black pile on posterior margin of tergum 2, on posterior one-half of tergum 3, extending a little more anteriorly in middle and on lateral margins, on tergum 4 in two anterior patches on each side, reaching three-fourth length of tergite posteriorly; pile on lateral margins of abdomen all golden yellow except two tufts of black pile on posterolateral corner of tergum 2 and medially on tergum 3; sterna brownish black, joints of sterna 1 and 2 and of sterna 2 and 3 reddish yellow.
Type series, 2 males, collected in Mussoorie and Naini HIlls, India.