128 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



part of the cheeks, golden yellow. Front twice as wide as either eye, 

 two pairs of orbital bristles, the anterior pair proclinate, the other re- 

 clinate; arista considerably thickened at the base. Body grayish prui- 

 nose, three pairs of postsutural dorsocentral bristles, two sternopleurals, 

 scutellum bearing three marginal pairs, second segment of abdomen 

 with marginal pair, the following two with a marginal row. Wings 

 smoky, especially along the costa, third vein bristly almost to the small 

 cross-vein. Tibiae not ciliate. 



Length, nearly 5 mm. 



Victoria, Texas. A single specimen collected by Mr. A.. L. 

 Ouaintance. 

 ' Type: No. 13095, U. S. National Museum. 



TETROPSIS, new genus. 



Near Hilarella, but the antennae reach only two-thirds of distance to 

 the oral margin, the first posterior cell is closed and with a petiole three- 

 fourths as long as the hind cross-vein, etc. Head in profile subquadrate, 

 ocellar bristles proclinate, frontals one-rowed, not descending below base 

 of antennae, facial ridges and sides of face bare, vibrissae on a level with 

 the oral margin, cheeks one-fourth as wide as the eye-height, eyes bare, 

 third joint of antennae only slightly longer than the second, arista bare, 

 scarcely longer than the antennae, the penultimate joint slightly longer 

 than wide; proboscis beyond the articulation shorter than height of head, 

 palpi present. Veins bare, except the base of the third, this vein ends 

 about half-way between apex of the second and the extreme wing-tip; 

 hind cross-vein midway between the small and the bend of the fourth, 

 the latter angular and without an appendage. 



Type: The following species: 



Tetropsis modesta, new species. 



Female. Black. Head gray pruinose, becoming yellowish on the 

 upper part of the front; front nearly twice as wide as either eye, frontal 

 vitta greatly widening above, yellowish pruinose, except a median vitta 

 and the lowest third, two pairs of orbital bristles. Arista thickened on 

 basal half, thence gradually tapering to the tip. Body yellowish-gray 

 pruinose, the first abdominal segment somewhat polished, the broad 

 apices of the remaining segments polished. Three postsutural dorso- 

 central bristles, two sternopleurals, two marginal pairs on the scutellum, 

 first two abdominal segments without distinct bristles, the following two 

 with a marginal row. Wings hyaline, third vein bristly half-way to the 

 small cross-vein. Calypteres white. Tibiae not ciliate, front tarsi no- 

 ticeably dilated on the last four joints, the claws and pulvilli very short. 



Length, 4 mm. 



