66 Journal New York Entomological Society. [Vol. xm - 



(Mrs. A. T. Slosson). Three males and two females. Type No. 

 8372, U. S. National Museum. 



Tanypus nubifer, new species. 



Distinguished by the spotted, bare wings. Yellow, the first antennal joint, 

 palpi, three vittse on the mesonotum, lower portion of thorax, the metathorax, and 

 bases of abdominal segments, brown, the legs whitish. Plumosity of antennae gray, 

 but appearing yellowish in certain lights. Body opaque, gray pruinose. Tarsi 

 slender, the fourth joint longer than the fifth, front tarsi bearing many long hairs. 

 Wings bare, whitish hyaline, a brownish cloud on the small crossvein, two near 

 middle of first posterior cell, one beyond middle of second posterior cell, one near 

 apex of posterior branch of fifth vein and about four in the anal cell, some of the 

 latter very faint ; first vein forked before the apex, fifth vein forks a short distance 

 beyond the crossvein. Length 3 mm. 



Salt Lake, Utah. Two males collected June 26 by Mr. H. S. 

 Barber. Type No. S373, U. S. National Museum. 



Tanypus heteropus, new species. 



Black, the halteres light yellow. Plumosity of male antennae yellowish brown. 

 Thorax opaque, mesonotum with three blackish vittse ; hairs of abdomen whitish. 

 Tarsi not bearded, the fourth joint short and dilated, shorter than the fifth. Wings 

 hyaline, bare, first vein simple, the fifth forks a short distance before the crossvein. 

 Length 3 to 4 mm. 



Pullman, Washington (March 26 and April 9, R. W. Doane) ; 

 Las Vegas Hot Springs, N. M. (March 21, T. D. A. Cockerell) : 

 Mt. Washington, N. H. (Mrs. A. T. Slosson). Nine males and one 

 female. Type No. 8374, U. S. National Museum. 



Tanypus tenebrosus, new species. 



Near pilosellns but much larger, the body chiefly black, etc. Black, the anten- 

 nae of female except the first joint, the scutellum, sides of male abdomen, ley> and 

 halteres, yellow. Plumosity of male antennae grayish brown, appearing partly whit- 

 ish in certain lights. Tarsi slender, the front ones not bearded, the fourth joint 

 longer than the fifth. Wings hyaline, densely covered with hairs, first vein simple, 

 the fifth forks slightly before the crossvein. Abdomen of female spatulate, widest at 

 the fifth and sixth joints. Length 3 to 4 mm. 



Franconia, N. H. One male and two females collected by Mrs. 

 A. T. Slosson. Type No. 8375, U. S. National Museum. 



Chasmatonotus fascipennis, new species. 



Black, the bases of antenna', middle of pleura, base of venter, balteres, trochanters 

 and bases of femora, yellow. Body polished. Wings brownish, the base broadly, a 

 broad crossband just beyond forking of the fifth vein, and the very narrow apical 

 margin of the wing, prolonged along the posterior margin to the median crossband, 

 whitish hyaline, the crossband changing to yellowish in front of the third vein. 

 Length 1.5 to 2 mm. 



