Eristalinus (Eristalinus) dissimilis (Adams 1905)

Face not strongly produced, facial tubercle yellow. Eyes pilose, with numerous small black dots. Thorax above with bronzy vittae. Scutellum yellow translucent with yellow and black hairs. Abdomen: 2nd segment with broad black basal band which is usually is (almost) connected with black posterior border.

Original description in:
Adams, C. F. 1905. Diptera africana. I. Kans. Univ. Sci. Bull. 3
https://www.biodiversitylibrary.org/page/4343055#page/177/mode/1up

Eristalis dissimilis, n. sp.
Male: Eyes contiguous above, brownish pilose, which is most prominent above, and with numerous small blackish spots; vertical triangle black pilose; front and face black, grayish pollinose and white pilose, facial tubercle and oral margin ing yellowish, sides of face on lower half nearly devoid of pollen; cheeks black, mostly shining; occiput yellowish-gray pollinose; proboscis shining black; antennae yellow, upper margin brownish black, brownish arista bare. Thorax yellowish-gray pollinose; mesouotum with four bronze, subshining vittae; pile light yellow; scutellum yellowish translucent, pile of base and margin light yellow, that of the dorsum black; halteres yellow; pleurae largely subshining black. First abdominal segment gray pollinose, yellowish on sides, second segment yellow, with an opaque, black cross-band on base attenuated laterally, the apical cross-band is not attenuated laterally, is narrower and opaque black except centrally along posterior margin, where it is shining bronze, in most specimens the two bands are nearly connected centrally by a brownish longitudinal vitta; third segment yellow, posterior margin broadly subshining black, a brown spot centrally on anterior part; fourth segment shining black, anterior margin, except laterally, reddish yellow, back of this is a narrow, yellowish-gray pollinose, transverse band, sometimes interrupted in the middle; hypopygium shining black; pile of abdomen yellow, on dorsum of first segment, and lateral margins of remaining segments, white. Legs shining black, base of femora indistinctly, knees, basal two-thirds of the four anterior tibiae, base of hind tibiae narrowly, and the tarsi, except the third and fourth joints of the four anterior feet and last three joints of hind feet, yellow; pile of femora whitish, different parts of tibiae and tarsi covered with pile of the same color. Wings hyaline, veins brownish, stigma small. Length 10 mm.

Type locality: Harare, Zimbabwe
Numerous GBIF records from Zimbabwe and Northern South Africa
iNat observation: https://www.inaturalist.org/observations/69998542

Posted on 04 October, 2024 12:40 by traianbertau