15S Miss G. Ricardo — A Revision of 



sides. Moustache composed of numerous strong black 

 bristles, with some yellowish ones below, not extending to 

 the sides, which have soft whitish pubescence. Palpi black, 

 clothed with coarse, white, fairly long hairs, and with some 

 stout black bristles at the apices. Proboscis slightly longer. 

 Beard of thick white pubescence. Antennce black, the third 

 joint reddish yellow, the first two joints with black hairs, 

 the third bare, with a distinct style, longer than the first two 

 joints together and broader. Forehead black, with grey 

 pubescence. Hind part of head with whitish hairs. Thorax 

 black, with spare greyish pubescence on the dorsum; the 

 shoulders covered with ashy-grey tomentum ; two stripes of 

 grey tomentum apparent ; sides whitish, with white pubes- 

 cence ; breast-sides black, with a broad horizontal whitish 

 stripe and white pubescence ; one long black bristle on side 

 of thorax beyond the transverse suture and three shorter 

 ones below on the breast-sides just above the suture. Scu- 

 tellum black, with long whitish pubescence. Abdomen 

 bluish, shining, the first three segments with whitish pubes- 

 cence, fourth and fifth with very short, chiefly black pubes- 

 cence, sixth and seventh with bristly yellowish hairs ; anus 

 with similar hairs ; sides of abdomen with white hairs, except 

 on the fourth and fifth segments, where it is short and black. 

 Legs black, sleuder, the middle and anterior tibise and tarsi 

 with thick fringes of black hairs, replaced on the fore tarsi 

 by white hairs, which cover the tarsi on upper sides and are 

 very noticeable. Hind tibise and tarsi armed with some 

 short black bristles. Wings hyaline, brown on basal half, 

 extending to the apex of first basal cell, and to the base of 

 the discal cell, filling most of the anal cell, leaving the 

 axillary to be almost hyaline ; veins brown, the fourth poste- 

 rior and anal cell closed, the transverse veins closing discal 

 and fourth posterior cells almost parallel, the fourth at base 

 not pedunculated, the small transverse vein situated beyond 

 the middle of discal cell. 



Female similar. Abdomen longer and pointed, the pubes- 

 cence much less and shorter, white on the first two segments, 

 then black; the first segment is blackish, the next three 

 purplish, the remaining oues blue, metallic, shining ; sides 

 with short white hairs, intermixed with black on the first 

 three segments, then black and shorter. Legs : the pubes- 

 cence is wholly black. Face with the sides more widely 

 covered with light tomentum, which is golden yellow ; the 

 hairs on first two joints of antenna are yellow below, the 

 hairs on palpi yellowish. Wings more wholly brown, only 



