Baccha liberia, new species
Black, the antennae and legs partly reddish, wings grayish, .hyaline on basal fourth.
Male
Head steel-blue, the facial tubercle and frontal triangle black, the latter slightly bronzed; upper fourth of front, face, cheeks and occiput grayish pollinose. Pile black, yellow on the cheeks and lower half of occiput; occipital cilia brown on upper third, white below. Eyes touching for a distance almost equal to the length of the frontal triangle; ocellar triangle situated at front of vertical triangle; lower two-thirds of frontal triangle swollen; oral margin slightly more prominent than the antennal base, the tubercle long and prominent; lower edge of head oblique. An- tennae brown, the lower surface of the first two and broad base of the third segment, except above, reddish; the third segment oval, rounded apically; arista shorter than antenna, luteous on basal half.
Thorax rather bronzed, the dorsum dulled by brown pollen, the pleura gray pollinose except a fascia beneath the base of the wings. Pile of the dorsum, pteropleura and upper border of the mesopleura, blackish or brown, on the pleura and scutellum, yellowish, the latter with some black hairs apically, the ventral fringe yellowish. Legs blackish; tips of femora, broad bases of the tibiae, the middle pair almost wholly, and the basal tarsal segment, brownish yellow, the hair black.
Wings, brownish gray, the basal fourth hyaline; the base of the wing before the humeral crossvein, and the stigma, luteous; alula large. Squamae and fringe white; halteres pale yellow.
Abdomen shining blue-black, the apical half of the second and third segments opaque, the third more or less broadly shining in the middle posteriorly. First segment, sides of second on basal two-thirds and small lateral triangles on the third, long, whitish pilose, the basal third of the second segment and a small, submedian triangle on either side of the third, with shorter white pile. Pile elsewhere black, long basally on the sides, short and appressed dorsally beyond the middle of the second segment.
Genitalia small, rather brownish. Abdomen rather strongly petiolate, the second segment scarcely longer than the third.
HOLOTYPE.-Male, Memel Town, Liberia, August 29, 1926, (J. Bequaert).
unless otherwise stated