A new genus and species of subfamily Medeterinae (Diptera: Dolichopodidae) from Cameroon

Cameroonomiya matilei Grichanov, gen. et sp. n. is described from Cameroon. The presence of distinct anterior preaрiсаl seta on mid and hind femora places the new genus in the tribe Udzungwomyiini. It is considered close to the genus Udzungwomyia Grichanov, 2018, but differs from the latter in the wing distinctly longer than the body; the face almost parallel-sided, about 2 times as wide as height of the postpedicel; the postpedicel subtriangular, with dorsal arista-like stylus; six pairs of dorsocentral bristles; the male hind tibia and basitarsus simple, without modified setae or bristles; the sternum 2 with long and thin ventral process in both sexes; the hypopygium with epandrial foramen positioned left laterally; the hypandrium long and broad (ventral aspect), flat, with distal emargination; the surstylus with modified arms. Species of Udzungwomyia differ from Cameroonomiya gen. n. in the wing distinctly shorter than the body; the face in middle about as wide as height of postpedicel, half as wide as face at clypeus and under antenna; the postpedicel semiglobular, with preapical arista-like stylus; four pairs of strong dorsocentral bristles; the male hind tibia swollen at apex, with two long thick curved apicals; the hind basitarsus with basiventral process; the sternum 2 without ventral process; the hypopygium with epandrial foramen positioned basally; the hypandrium short, bifurcated from base; the surstylus with simple arms. A key to four genera of the tribe Udzungwomyiini is provided.