34 Journal New York Entomological Society. [Voi. xii. 



reddish-yellow, pulvilli and bases of tarsal claws yellowish, hairs and bristles yel- 

 lowish-white, bristles of legs chiefly black ; third joint of antennae rather slender and 

 elongate, about ten times as long as the style ; body grayish-pruinose ; mesopleura 

 bare, hypopleura hairy ; wings dark brown along the broad hind margin and apex, 

 the remainder largely tinged with yellowish, veins brown and yellowish, narrowly 

 bordered with grayish, first posterior cell scarcely narrowed toward the apex, the 

 fourth closed near the wing-margin ; length, 14 mm. 

 Two males collected in April and May. 



Stenopogon nitens, new species. 



Distinguished by the polished abdomen. Black, the halteres whitish, pulvilli 

 yellow and with two brown vittse, tarsal claws reddish at the bases ; hairs and bristles 

 whitish, those on the antenna, front, middle of mesonotum, abdomen except the first 

 two segments, and on the legs except the coxce, black, pubescence on inner side of 

 front tibise golden yellow, hairs on lower side of front femora chiefly whitish ; meso- 

 pleura bare, hypopleura hairy ; third joint of antennae rather slender and elongate, 

 about sixteen times as long as the style ; head and thorax grayish pruinose, the 

 mesonotum, except along the sides and posterior end, somewhat polished ; abdomen 

 polished, a transverse, white pruinose streak in hind angles of segments two to five ; 

 wings blackish, tinged with yellowish in the costo-basal portion, veins black, first 

 posterior cell considerably narrowed at the apex, the fourth closed in the margin ; 

 length, 16 mm. 



A male specimen collected in May. 



Erax tuberculata, new species. 



Distinct from all of the species known to me by the three large tubercles on the 

 venter of the abdomen. Black, the halteres, tibias and bases of tarsi yellow, apices 

 of the tibiae brown ; hairs and bristles of head and antennae white, a pair of ocellar 

 bristles, a cluster at middle of sides of oral opening, and the hairs and bristles of the 

 palpi, black ; third joint of antennae ovate, subequal in length to the first, about one 

 third as long as the style ; middle of face strongly gibbous and covered with bristly 

 hairs except on the upper fifth, eyes unusually approximated at their upper corners, 

 strongly diverging below. Thorax gray pruinose, marked in the middle with three 

 black vittce, the middle one narrow and not reaching the suture, the outer ones pro- 

 longed slightly beyond it ; hairs of anterior half of mesonotum short, black, those 

 along the margins chiefly white, the posterior portion bearing many long, chiefly 

 white, hairs, the bristles mostly black ; hairs of pleura and scutellum white, scutel- 

 lum bearing two white bristles. Abdomen gray pruinose, when viewed from behind 

 there is revealed a large, subtriangular black spot at the base of segments two to six, 

 hairs of the abdomen white, those on the dorsum sparse and short, those on the upper 

 side of the very large, polished hypopygium black ; just behind the center of the 

 under side of segments four, five and six is a polished tubercle which is nearly as 

 long as the second tarsal joint. Hairs of legs white, the bristles of the first two pairs 

 of femora and tibiae chiefly white, those of the tarsi and hind legs black. Wings 

 hyaline, costa scarcely thickened beyond apex of auxiliary vein, third vein forks 

 beyond apex of discal cell. Length, 12 mm. 



Three males, two of them collected at San Diego, Texas, April 



