OSTEN SACKEN ON WESTERN DIPTERA. 267 



Female. — Front shining black, with some white scales on each side 

 above the antennae, the latter altogether black ; in other respects, like 

 the male. 



Length about 7 mm (measuring the chord of the curve formed by the body). 



jELab. — Waco, Texas (Belfrage); Georgia (Morrison). Two males and 

 two females. 



2. Toxophora amphitea Walker, List., etc., ii, 298. 



Head and antennae black ;' second joint with a white reflexion on 

 the inner side ; a tuft of yellowish- white scales on the frontal triangle ; 

 occiput densely beset with pale yellow, erect pile. The black ground- 

 color of the thorax is more or less covered anteriorly with a fulvous 

 tomentum and pale yellow pile; the pleurae are covered with white, 

 silvery scales ; thoracic bristles black. Abdomen black ; a longitudinal 

 stripe of scales along the dorsum gradually expands posteriorly ; the 

 scales upon it yellowish anteriorly become silvery-white posteriorly; 

 on each side, the posterior margins have a short but broad cross- 

 band of scales, yellow on the anterior, white on the posterior segments ; 

 these cross-bands are interrupted before reaching the dorsal stripe on 

 segments 2-4; beyond the fourth segment, the cross-bands become 

 more or less coalescent with that stripe ; beyond the third segment, the 

 cross-bands are coalescent with each other on the ventral side ; venter 

 with white scales. Legs black ; femora with white and yellow, tibiae with 

 golden-yellowish scales. Wings as in T. virgata; but the cross- vein 

 between the discal and second posterior cells is angular and bears a 

 stump of a vein. Length about 5 mm (measuring the chord of the curve 

 formed by the body). 



Sab. — Middle and Southern States. In preparing this description, I 

 had two males from Kentucky and Georgia before me. The color of 

 the covering of scales on the abdomen is very variable. 



3. Toxophora spec, from California (H. Edwards). — Very like T. 

 fmata, but larger and certainly distinct. I have only a single specimen, 



not well preserved enough to be described. 



4. Toxophora fulva Gray, in Griffith's Animal Kingdom, xv, Insects, 

 pt. ii, 779, tab. 126, fig. 5. 



Ground-color opaque-black, but partly covered with fulvous scales 

 and hairs. Face grayish-pollinose ; front, in the female, covered with 

 yellow scales ; vertex with a few black bristles pointing forward ; occiput 

 with a dense fulvous fur. Thorax clothed with fulvous hairs on the 

 front part of the dorsum ; a fringe of shorter hair of the same color 

 runs around the dorsum, the. middle of which is usually denuded and 

 black ; scutellum also fringed with yellow hairs ; thoracic bristles black. 

 The posterior margins of the abdominal segments have borders of 

 yellow scales, forming cross-bands, which coalesce on the sides of the 

 abdomen ; a longitudinal dorsal stripe of similar scales begins at the 

 hind margin of the third segment, and runs to the end of the seventh. 

 Venter for the most part clothed with yellow scales. Legs black, 

 6 H B 



