NO.12S0. NEW XOIITII AMERICAN DIPTEBA—COQilLLETT. 12X 



Family DEXIIXE. 



MYOCERA BIVITTATA, new species. 



Black, the sec-ond aiitiMinal joint, face, rboeks, and palpi yellow: 

 antennjv three-fourths as long as the face, the third joint nearly three 

 times as lono- as the second, arista rather l0n«' plumose, sides of face 

 on the upper part golden yellow pruinose, and with a few short hlack 

 bristly hairs, on the lower portion and the cheeks in certain lights \ery 

 thinly whitish pruinose; cheeks two-thirds as broad as the eye height; 

 proboscis one and one-tifth times as long as height of head, slender, 

 rigid, labella small; bod}' rather slender, gray pruinose; mesonotum 

 with three, scutellum with one, first three segments of abdomen with 

 two l)lack vittai, the latter united on the first segment; also a ])lack 

 vitta on pleura in front of each wing; second and third abdominal seg- 

 ments bearing only marginal bristles: hind tibi* not ciliate, middle 

 tibiaj bearing a single bristle on the outer-anterior side, front pulvilli 

 greatly elongated: wings hyaline, gray at the base, veins bare, bend of 

 fourth roiuided and without an appendage, front calypter and base 

 of the other white, remainder of the hind one brown; length, 7 mm. 

 A male specimen collected August IT by Mr. C. H. T. Townsend; 

 received from Prof. T. D. A. Cockerell. 



Ilahitat.— White Mountains, New Mexico (altitude about 8,200 feet). 



Type.— Cut. No. 6235, U.S.N.M. 



MEGAPARIA FLAVEOLA, new species. 



Yellow, the mesonotum except lateral margins, and a median vitta 

 on the abdomen black; base of scutellum brown: vertex one- third as 

 wide as either eye, sides of face bare, cheeks slightly less than half as 

 w4de as t .e e3"e height, antennae nearly half as long as the face, the 

 third joint slightly longer than the second; arista l)lack, its longest 

 hairs only slightly longer than its greatest diameter; proboscis and 

 palpi unusually short and robust; mesonotum gray pruinose, marked 

 with three black vitta^; abdomen yellowish gray pruinose, the first 

 three segments with marginal bristles; hind tibia> not ciliate, claws 

 and pulvilli unusually long: wings hyaline, third vein bristly halfway 

 to small crossvein, fourth vein rounded at the bend and without an 

 appendage, first posterior cell closed in the wingmargin, calypteres 

 whitish; length, 8 mm. A male specimen. 



Ilah'itat. — Colorado. 



7}//^^— Cat. No. 623(i, U.S.N.M. 



CHiETONA FLAVIPENNIS, new species. 



Black, theantennte and palpi yellow, frontal vitta, cheeks, and lower 

 part of sides of face, reddish l)rown; vertex of male one-sixth, in the 



