176 ENTOMOLOGICAL SOCIETY 



slightly longer than the second, the latter wider than long, the third over 

 four times as long as the first two, nearly straight on the lower edge but 

 convex on the upper, emarginate at the apex, the hairs along its upper 

 edge very short and sparse ; proboscis black, somewhat more than twice 

 as long as the head, palpi yellow, slender, slightly enlarged toward 

 the apex. Thorax black, thinly grayish pruinose, the humeri and a 

 spot at base of wings yellow, hairs whitish; scutellum yellow, the bases 

 of the sides and the under surface black. Abdomen black, apices of the 

 segments yellow. Legs yellow, greater part of coxae and apices of tarsi 

 brown. Halteres yellow. Wings whitish, unusually broad, discal cell 

 very large, last section of fifth vein less than one-half as long as the pre 

 ceding section. Length 3.5 mm. 



Texas. A male specimen. 



Type. No. 8022, U. S. National Museum. 



Phthiria bicolor, n. sp. 



$. Black, the humeri, scutellum except under side and sides at base, 

 hind margins of the abdominal segments except the first, lower half of 

 hypopygium, and the halteres except upper side of the knobs, yellow, knees 

 of the front and middle legs broadly yellowish brown. Frontal triangle 

 gray pruinose, sides of face polished and nearly bare; first two joints of 

 antennae subequal in length, each slightly broader than long, the third 

 joint nearly four times as long as the first two taken together, its upper 

 and lower edges almost parallel, the apex deeply emarginate and bearing 

 a short style in the middle of the emargination ; proboscis three times as 

 long as the head, palpi nearly reaching middle of the third antennal joint, 

 very slender and almost linear. Body opaque, the genitalia polished, 

 hairs chiefly whitish, mesonotum somewhat velvety, the sides and front 

 end grayish pruinose. Wings hyaline, stigma obsolete, small cross-vein 

 near middle of discal cell, last two sections of fifth vein subequal in length. 

 9. Black, the head except center of occiput, the sides of the mesono 

 tum, a vitta through middle of pleura, the scutellum except under surface 

 and sides toward the base, hind margins of abdominal segments both 

 dorsally and ventrally, also the halteres, yellow. Mesonotum bluish gray 

 pruinose. Otherwise as in the male. Length 2.5 mm. 



Rio Ruidoso, White Mts., N. M., July 27 (C. H. T. Town- 

 send) ; Filmore Canyon, Organ Mts., N. M., August 29 (C. H. 

 T. Townsend) ; and Pecos, N. M.. in August (Mrs. W. P. Cock- 

 erell). One male and two females. 



Type. No. 8023, U. S. National Museum. 



Acreotrichus atratus, n. sp. 



Black, the halteres and hind margins of ventral segments yellow, hairs 

 black. First joint of antennae slightly longer than the second, distinctly 

 longer than wide, the third joint rather slender and of nearly an equal 

 width, about three times as long as the first two taken together, the upper 



