Belobackenbardia mostovskii Shatalkin, 2021

Shatalkin, A. I., 2021, Belobackenbardia mostovskii sp. n. (Diptera, Psilidae) is the fourth species of an endemic genus found in South Africa, Russian Entomological Journal 30 (3), pp. 342-344 : 343

KEY TO THE SPECIES OF GENUS BELOBACKENBARDIA SHATALKIN

1. Occiput behind ocellar triangle with black spot. Fronto-orbital setae absent. Mesonotum yellow with a median black stripe narrow anteriorly and wider, filling the space between dc setae in the posterior part; scutellum with a similar median stripe; metanotum dark brown ........... 2

— Occiput yellow without black spot behind ocellar triangle. 1 or 2 fronto-orbital setae. Mesonotum entirely yellow or with a pair of pale narrow lateral stripes, extending from suture to dc; scutellum and metanotum yellow ........... 3

2. 3rd antennal segment with dark spot around arista. Male: epandrium basally with a pair of longer and narrower lobes (ep l: caudal extremity of abdomen ends with these lobes which are clearly visible on insect); surstyli apically with a pair of short lobes, basally with a pair of narrow conical processes (con pr) oriented dorsally (Figs 1–2). Female: mesonotal median stripe contrasting ................ ......................... Belobackenbardia cornicula Shatalkin

— 3rd antennal segment with indistinct dark spot around arista. Male: epandrium basally with a pair of shorter and wider lobes; surstyli apically with a pair of longer lobes, basally without a pair of dorsally oriented narrow conical processes (Figs 3–4). Female: mesonotal median stripe poorly expressed ............................................................. ............................. Belobackenbardia munroi Shatalkin

3. Mesonotum yellow with a pair of pale narrow lateral stripes, extending from suture to dc. Fore and middle legs yellow. Abdomen entirely yellow .................................. ........... Belobackenbardia stuckenbergiorum Shatalkin

— Mesonotum entirely yellow. Fore tibia grayish, fore tarsus darker; middle tibia darkened in basal half. Abdomen yellow; dorsal side of all tergites broadly dark brown .. ............. Belobackenbardia mostovskii Shatalkin , sp.n.