PROCKEDINGS OF THE NATIONAL MUSEUM. 



marked with a few brown dots, abdomen partly light gray pruino'^e; 

 legs slender, not setose, whitish, femora with a ])road median and a 

 narrow apical brown band, tibiw with a l)r<)ad median brownish l)and 

 and a narrow one at each end, first joint of hind tarsi over twice as 

 long as the second, the third and fourth subequal in length and scarcelj^ 

 longer than broad, the fifth nearl}^ twice as long as the fourth, claws 

 rather large and of an equal size; wings bare except along the apical 

 margin, hyaline, marked with eight black dots, situated as follows: just 

 before small crossvein, below middle of fifth vein, before apex of each 

 of its branches, beyond base and before apex of lower fork of fourth 

 vein, before apex of uppei- fork of this vein, and at apex of third 

 vein, the latter slightly beyond middle of length of wing, third vein 

 contiguous to the first except toward its apex, tip of first vein near 

 four-fifths of the third, fourth vein forks considerably beyond the 

 small crossvein; halteres whitish, a black dot at base of the knoli and 

 another at its apex; length, 1 mm. A male specimen collected May 17 

 by Mr. H. S. Barber. 



Habitat. — Washington, District of CoUunl)ia. 



Type.—C^t. No. 6101, U.S.N.M. 



CERATOPOGON SQUAMIPES, new species. 



Black, knoV)s of halteres whitish, legs dark brown, the knees yellow- 

 ish; eyes contiguous, mesonotum opaque, covered with appressed 

 3'ellow hairs and with longer erect brown ones; legs rather slender, 

 not spinose, bearing many long hairs; tibial on the outer side bearing 

 several lanceolate flattened bristles, first tarsal joint slightly shorter 

 than the second, last two joints subequal in length; claws small, equal, 

 empodia small; wings hyaline, wholly covered with hairs which are 

 brown except a patch of yellowish ones at ape-x of third vein, this vein 

 contiguous to the first, ending at middle of length of wing; apex of 

 first vein near three-fourths length of the third, fourth vein forking 

 considerabl}^ before the small crossvein; length, 1 mm. Three females 

 collected August 14 and 19 by Mr. H. S. Barber. 



Habitat. — Las Vegas Hot Springs, New Mexico. 



Type.— Cvit. No. 6162, U.S.N.M. 



HETEROMYIA PRATTII, new species. 



Head reddish brown, eyes rather widely separated on the front, 

 antennw brown, the first joint and bases of several of the succeeding 

 ones yellow, joints beyond the first noticeably longer than broad, 

 thorax almost bare, black, the humeri and prothorax reddish brown, 

 the sides, pleura, and metanotum sometimes reddish yellow, mesonotum 

 somewhat polished, fineh^ aciculate, not pruinose, prolonged anteriorly 

 in a short spine, scutellum reddish brown, abdomen dark brown, hind 

 margins of the first five segments yellow, somewhat polished, not 





