Euscelidia rapax Westwood, 1850
Head: black; face yellow pruinose, facial gibbosity distinct, mystax yellow, many macrosetae, nearly as long as proboscis; ocellar tubercle apruinose; occiput silver pruinose, setae yellow; Antennae (pedicel and postpedicel broken) - scape brown, yellow setae ventrally
Thorax: black; scutum black, 2 orange spots antero-laterally, predominantly apruinose, margins white pruinose, yellow setae on anterior, lateral, and posterior margins, leaving dorsal surface nearly uncovered; scutellum white pruinose, discal scutellar setae and scutellar setae long, yellow
Legs: red-orange to brown; prothoracic and mesothoracic femora light brown, mesothoracic femora with brown ring medially, metathoracic femora pale yellow proximally, brown medially, orange distad, clubbed, club densely covered with long, erect yellow setae; prothoracic and mesothoracic tibiae brown, yellow stripe anteriorly, metathoracic tibiae orange to light brown, yellow stripe not reaching tip anteriorly; empodium distinct, very short
Wings: densely covered with microtrichiae, brown coloured; pterostigma indistinct, brown; discal cell terminating in 2 veins; halteres light brown
Abdomen: brown; tergites on anterior and posterior margins orange, grey pruinose, setae yellow, T1 with long yellow setae, T2 in proximal half with yellow setae laterally
Male terminalia: surstylus bent inwards distally; hypandrium proximally greatly enlarged, with rectangular membranous area ventrally; dorsal aedeagal sheath long, lateral apodeme bifurcated.
The species is distinguished from congeners by the generally large size, darkened wings, the presence of yellow setae on the scutum, erect setae on the clubbed metathoracic femora, and characters of the male terminalia. This species is part of the datis species-group.
Type locality: "Africa tropicale ?" - uncertain, possibly DR Congo.
Afrotropical Region: DR Congo.