24 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. 62. 
CHROMOLEPIDA PRUINOSA (Coguillett.) 
1904. Psilocephala pruinosa CoquiLLETT, Proc. Ent. Soc. Wash., vol. 6, p. 91. 
The original description, from a male specimen, is recognizable. 
There is a male of this species, evidently a paratype, in the Stanford 
University collection, taken at Managua, Nicaragua (C. F. Baker). 
The specimen is labeled ‘‘ Psilocephala pruinosa n. sp., det. Coq.” 
Type locality — Granada, Nicaragua. 
Type.—Male, No. 7795, U.S.N.M. 
In the specimen examined the thorax is very thinly gray pollinose 
and very few of the characteristic scales remain, the specimen being 
somewhat rubbed. The trochanters are brown and the coxae black; 
some of the scales of the pleura and coxae are quite large and irides- 
cent; the pile is sparse and whitish. Before the scutellum the scales 
are much smaller and yellowish. The scales of the dorsum of the 
abdomen are slender and silvery white. 
CHROMOLEPIDA BELLA, new species. 
Plate 3, figs. 16, 17, and 18. 
Male.—Length 5.5 mm. Head black, the upper half of the eyes 
with much larger facets than the Jower (a more marked difference 
than in Thereva and Psilocephala); two narrow blue stripes across 
the middle of each eye. Face with two shining black callosities below 
the antennae as in C. pruinosa, whitish pollinose around the callosi- 
ties; callosity above the antennae shining black. Pile of cheeks and 
occiput white; antennae black, the first joint a little longer than the 
second and third combined, slender, cylindrical (see fig. 17); the first 
two joints with short black pile, a few more bristlelike at the apex of 
the first joint; a very small subapical style on the third joint. Middle 
of frontal triangle with a velvet black crossband, above and at sides 
whitish pollinose. 
Thorax black, thinly gray pollinose, thickly clothed with yellowish 
white scales above and iridescent ones on the sides and pleura; the 
pile very sparse and white. Coxae and trochanters black, the coxae 
with iridescent scales. Halteres yellow, the base of the stem brown. 
Scutellum gray pollinose, with four bristles. 
Abdomen black above, the last three segments and genitalia largely 
reddish yellow; pile of abdomen white, yellowish on the genitalia; 
upper lamellae of genitalia large. Dorsum of abdomen whitish prui- 
nose and with silvery white tomentum; venter reddish yellow, with 
pale pile and yellowish scales. Femora, tibiae except apex and base 
of tarsi yellowish, the rest of the legs black. Femora with only a 
few short bristles below, three to six on the hind ones. Wings yel- 
lowish gray, hyaline in places, darkened near the apex; stigma and 
costa yellow; cell M-3 closed and petiolate. 
