Baccha bequaerti, new species
Black, antenne and legs in part reddish; wings pale brown, hyaline subbasally.
Length, 8 mm.
Male.Head steel-blue, the front bronzed, small spot in the upper angle gray pollinose. Pile black, on the lower two-thirds of the occiput, white; sides of face and occiput gray pollinose, the latter shining above; eyes touching for a distance equal to the length of the frontal triangle, the upper facets swollen; ocellar triangle occupying the anterior half of the small vertical triangle, the hairs in a single row. Frontal triangle moderately swollen above the lunula. Face below slightly more prominent than at the antennal base, the tubercle large and prominent; lower edge of mouth oblique. Antennae brown, reddish below, the third segment somewhat longer than wide, obtusely rounded apically.
Thorax aeneous, the dorsum dulled and more blackish, the sides behind the suture black; pleura with a black fascia beneath the wings. Pile on median third of mesonotum, pleura and dorsum of scutellum, yellowish; on the pteropleura, upper, posterior border of mesopleura and the broad margin of the scutellum, black. Scutellar fringe yellowish.
Legs black, the apices of the femora, broad bases of the tibiae and the apices of the anterior four tibiae, reddish; basal tarsal segment reddish brown. Pile black; yellowish on the anterior tibiae.
Wings pale brownish, the immediate base brown; the color becomes almost hyaline towards the basal sixth. Alulae large. Squamae and fringe brown. Halteres yellow.
Abdomen shining greenish-black, the apical two-thirds of the second and large, subtriangular spots on the apical half of the third and fourth segments, opaque. Pile wholly black, long on the sides basally, appressed dorsally. Genitalia small, shining black. Second abdominal segment four-fifths as long as the third. The abdomen is moderately slender, narrowest at the middle of the second segment.
HOLOTYPE Male, Eden, Cameroon, (J. A. Reis).
Looks very much like B. liberia but the shorter abdominal segment, shorter abdominal petiole and the brown squamae at once distinguish it.
unless otherwise stated