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 gressitti Ghorpade
Yellowish species with black fasciate terga. Vertical triangle shorter than sutura of eyes. Antennal basoflagellomere brownish black, only basoventrally orange yellow; arista brownish orange, longer than antenna. Pleura mostly black, more yellow pollinose. Scutellar pile almost all black. Coxa and trochanter yellow; profemur yellow with some black pile on extreme apex; metatibia brownish black except extreme base; pro- and mesotarsi brownish yellow, metatarsus brownish black. Abdomen very weakly spatulate, if at all; sterna yellow, with distinct black fasciae on sterna 3 and 4.
Adapted from Ghorpade (in litt. from 2007).
As in angara except with following differences:
Head: Dorsal ommatidia red with a golden sheen; frontal pile black, even besides antennal bases; supraantennal prominence mostly black; vertical triangle with black pile and almost one and one-half times shorter than sutura of eyes; occiput white pilose but becoming yellow on vertex, especially behind vertical triangle; antennal scape and pedicel orange yellow, basoflagellomere orange-yellow only basoventrally, almost three-fourth or so black dorsally, elongate-oval, as long as scape and pedicel, arista brownish orange, longer than antenna; gena distinctly more orange than face.
Thorax: Scutum black, considerably yellow pollinose dorsally, especially more on lateral margin, including calli; pleuron dull black, shining, with all sclerites except bare black katepisternum (except yellow pollinose dorsal macula) and meron (except dorsal one-fourth yellow pollinose and pilose; dorsal sclerite of anterior anepisternum bare; scutellum deep yellow, pile all black except a few yellow pile on anterior margin and anterolateral corners; subscutellar fringe also yellow. Wing: Hyaline, even at apex which is clear, wholly microtrichose except apical half of cell bc (basal costal cell) anterobasally on cell br (first basal cell) above spurious vein, basal half and anterior margin almost to tip of cell bm (second basal cell), anterobasal margin of cell cuP (anal cell); anal lobe with two bare narrow strips from base almost to posterior wing margin; calypter pale yellow with long golden yellow hair fringe; plumula yellow. Legs: Generally golden yellow, profemur with some short black pile on extreme apex, metafemur with apical half black pilose dorsally, metafemur with medial oblique brownish black fascia on outer side with apex also brownish, black pilose; pro- and mesotarsi brownish yellow, metatarsus brownish black.
Abdomen: Golden yellow; tergum 1 all golden yellow pilose; tergite 2 with posterior black fascia one-third width of tergum, extending almost to anterolateral corners on lateral margins, also extending medially as a thin vitta to anterior margin (or at least to middle of tergum); pile concolorous, with some yellow pile on black fascia mediolaterally; tergum 3 with variably narrow black anterior margin, emarginate in centre, posterior black fascia two-fifths length of tergite, less than half on middle, one-half length (or a little more) on lateral margin; pile concolorous dorsally on terga 1 and 2, laterally black except yellow anterolaterally on tergum 3 and long yellow pile on anterior three-fourths of tergum 2, all black on terga 3 to 5 except yellow on yellow mediolateral areas of tergum 2, tergum 4 with anterior margin variably narrowly black, on posterior margin orange yellow; tergum 5 orange yellow with similar, arcuate, subposterior fascia but reaching lateral margin, pile all black; lateral margin of abdomen with pile black except on anterior four-fifth of tergum 2 and wholly on tergum 1 where yellow; sterna translucent yellow, the black fasciae of terga 3 and 4 showing clearly; pile all long and yellow, short black pile from posterior half of sternum 4 posteriorly. Male genitalia: With paramere having thorn-like ventral projection short and feeble.
Oriental species known from Thailand, India and Nepal.