Mallota. 475 



arista brown, long and bare. Thorax grey or greyish yellow pruinose, 

 with indications of three paler stripes, but the colour is nearly hidden 

 under the dense pile, as thorax is densely clothed with long, pale 

 hairs. Scutellum yellowish with similar hairs as on thorax. Pleura 

 with long, whitish yellow hairs. Abdomen somewhat long, black or 



Fig. 160. Antenna of 31. cimbiciforniis (S, from the inside, x 40. 



bluish black, shining, with more or less narrow and obscure, reddish 

 hind margins to the segments; on second segment are a pair of more 

 or less obscure, yellowish, triangular spots near the basal corners, and 

 the basal corners of third and fourth segments may also be yellowish, 

 this colour sometimes vaguely extended in on the segments; some- 

 times abdomen is quite unspotted. Abdomen is clothed with short 

 hairs, which are sometimes all black, only at the base whitish, but 

 sometimes also whitish on the front part of third and fourth segments, 

 the whitish-haired space widening out towards the sides; at the side 

 margin the hairs are long and all white, or black at the hind corners 

 of the segments. Venter black with long, pale hairs. Legs black, the 

 extreme apex of the femora and generally also the extreme base of 

 hind femora reddish, and the basal part of the tibiæ may be more or 

 less reddish or yellowish, especially on middle tibiæ, which may be 

 yellow to near the apex; tarsi black or more or less brownish, especi- 

 ally the posterior pairs. Hind femora much thickened, hind tibiæ 

 broad, curved and somewhat compressed; the tarsi rather flat and 

 broad. Legs densely and longish-haired, hind trochanters with short, 

 dense, black hairs below, the hairs otherwise very varying in colour 

 from nearly all pale to nearly all black; hind femora with scattered, 

 long hairs below and with dense, short, black hairs which form a 

 dense clump, placed on a small swelling before the apex. Wings more 

 or less brownish tinged and with a more or less distinct fascia down 

 from the stigma. Stigma small. Squamulæ dirty yellowish with a 

 pale yellow fringe. Halteres yellow. 



