268 CHARLES A. BLAKE. 



Photopsis atrata Blake. 



Male. — Uniform black, shining, thinly clothed with a few scattered, erect hairs ; 

 head transverse, as wide as thorax ; antennae fuscous, mandibles dark ferruginous ; 

 eyes large, round, prominent; thorax robust, ovate, narrowed posteriorly, flanks 

 beneath the wings much swollen ; wings hyaline, iridescent ; marginal cell very 

 short, arcuate, rounded at apex, first submarginal large, second triangular, re- 

 ceiving the first recurrent near the base, third quadrate, receiving the second 

 recurrent before the middle ; stigma large, black ; tegulae honey yellow ; femora 

 black, tibiae and tarsi fuscous, clothed with pale pubescence ; abdomen elongate 

 ovate, petiolate; petiole pyriform, with a longitudinal dorsal impression, not 

 extending to apical margin, which is constricted, and on ventral surface a longi- 

 tudinal sulcus, widening to apex ; apical margins of segments narrowly fusco- 

 ferruginous. Length 7-9 mm. 



Hab. — Nevada. Seven specimens. 



Easily distinguished by the uniform black color and extreme 

 shortness of the marginal cell. 



Photopsis albipes Cresson. 



Male. — Uniform dark honey yellow, clothed with long, thin, pale pubescence, 

 more dense on abdomen, sparsely punctured, metathorax closely and rather 

 coarsely reticulated ; mandibles pale, with black tips and long hairs ; palpi pale ; 

 antennae yellowish white, scape with long hairs ; wings pale yellowish hyaline ; 

 marginal cell with a fuscous cloud, rather narrow, about equal in length with 

 the stigma, truncate at tip ; second submarginal cell subtriangular, the third sub- 

 quadrate, slightly narrowed beneath ; legs entirely yellowish white, clothed with 

 long whitish pubescence ; abdomen more or less tinged with fuscous, ovate, petio- 

 late, the petiole long, much swollen beyond the middle, strongly and rather 

 closely punctured, the apex strongly constricted. Length 11-12 mm. (Cresson.) 



Hab. — Nevada. 



Photopsis sobrinus n. sp. 



Male. — Uniformly dark honey yellow, transversely rounded, as wide as the 

 thorax, shining and minutely punctured ; eyes and ocelli large and prominent,' 

 mandibles bidentate at tips; antennae long, fulvo-testaceous ; thorax elongate 

 ovate, narrowed posteriorly, mesothorax convex, shining, very minutely and dis- 

 tantly punctured and having on the disc two deeply impressed, longitudinal lines 

 extending to the scutellum, which is convex and polished ; metathorax roundly 

 truncate, the dorsal groove reaching to the apex ; wings faintly yellowish hyaline, 

 marginal cell short, ovate and abruptly truncate at tip, three submarginal cells, 

 the first elongate subquadrate, as large as the second and third combined, the 

 second forming a small right angle triangle and receiving the first recurrent 

 nervure close to the base, the third quadrate, receiving the second recurrent 

 nervure at middle; stigma large, ovate, dark honey yellow; tegulee moderately 

 large, pale honey yellow, polished ; legs concolorous with the body, very sparsely 

 clothed with yellowish hairs; abdomen elongate ovate, petiolate narrowed to 

 apex, polished ; petiole subpyriform, having a slight longitudinal depression on 

 the disc, extreme apex fuscous, ventral surface, second and remaining segments 

 more or less stained with testaceous. Length 12 mm. ; expanse of wings 22 mm. 



Hab. — Colorado. 



