156 DIPTERA OF NORTH AMERICA. [PART IV. 



Brown ; antennae and palpi of the same color ; a sulphur yellow 

 spot on the humeri, extending towards the root of the wings; 

 halteres yellow ; their tip with a fine, silky, golden yellow pubes- 

 cence ; abdomen with a long, soft, pale brownish-yellow pubes- 

 cence ; genitals paler than the abdomen, yellowish-brown ; the 

 horny appendages of the male forceps are pale, with their tips 

 only black. Feet brownish-yellow, rather stout, pubescent with 

 brownish hairs, which look golden in a reflected light. Wings 

 with a somewhat dusky tinge ; pubescence of the veins long, 

 brown. 



I possess a single male specimen, captured by myself in the 

 Middle States of the Union ; the precise locality I am unable to 

 give. 



3. E. chrysocoma 0. S. % and 9. — Flava, alis flavescentibus, 

 punctis paucis fuscis ; pedibus conspicue fusco-villosulis. 



Yellow, wings yellowish with a few brown dots ; feet with a conspicuous 

 brown pubescence. Long. corp. 0.2 — 0.22. 



Syn. Erioptera chrysocoma 0. Sacken, Proc. Ac. Nat. Sc. Phil. 1859, p. 226. 



Bright yellow ; palpi brownish ; antennae brownish, basal joints 

 yellow ; those of the male have a dense, even pubescence on one 

 side, and long verticils on the other. Thorax somewhat more 

 saturate-yellow above, in well-preserved specimens with obsolete 

 hoary lines, visible in a reflected light, and indicative of the 

 intervals of the ordinary stripes ; halteres yellow ; abdomen 

 slightly tinged with brownish above ; male forceps yellow, the 

 horny appendages likewise ; when the forceps is open, a pair of 

 internal horny appendages become perceptible, the tip of which 

 is black. The feet are rather stout, and clothed with long brown 

 hairs, which makes them look altogether brown ; the basis of the 

 femora on the front feet and nearly the whole femora of the other 

 two pairs, except their tip, are yellow, and devoid of this brown 

 pubescence ; the front feet are conspicuously elongated. Wings 

 with a yellowish tinge, purely yellow along the anterior margin, 

 and more brownish behind; the costa has a fringe of golden 

 hairs, especially towards the apex ; small brown dots at the tip 

 of the first longitudinal vein and on the marginal cross-vein ; 

 still smaller ones on the subcostal cross-vein and at the tips of all 

 the longitudinal veins ; the central cross-veins are dark brown, 



