NORTH AMEKICAN HYMENOPTEKA. 261 



Photopsis (lanaii!^ Blake. 



Male. — Dark honey yellow, thinly clothed with erect white hairs; head round, 

 finely i)unctured ; eyes round, large, prominent ; antenuse fuscous ; thorax elon- 

 gate subquadrate, rounded in front, closely ])unctured, disc of mesothorax with 

 two longitudinal impressed lines, scutellum rounded, finely reticulate ; meta- 

 thorax roundly truncate, coarsely reticulate; tegulte convex; wings hyaline, 

 faintly iridescent, marginal cell elongate ovate, second submarginal obliquely 

 subquadrate, pointed towards base, its basal nervure sinuate, receiving the recur- 

 rent nervure before the middle ; nervui-es fuscous, a pale fuscous cloud extending 

 from the stigma and gradually widening to the first apical cell ; three faint 

 streaks of the same at apex ; legs fuscous, paler towards the joints, femora finely 

 punctured, thinly clothed with white hairs, calcaria pale ; abdomen ovate, petio- 

 late, petiole coarsely reticulate, second segment closely punctured, apical seg- 

 ments fringed with whitish pubescence ; under side same as above. Length 

 9 mm. ; expanse of wings 16 mm. 



Hab. — Texas. 



A variety has the basal segment more elongate. 



This species closely resembles P. clara Cresson, but may be easily 

 distinguished by the transverse fuscous cloud in the wings and the 

 coarse puncturing of the abdomen. 



Pliotopsis unioolor Cresson. * 



Male. — Uniform pale honey yellow ; head rather large, polished, with fine, 

 scattered jninctures, and long, thin, yellowish hairs; eyes very large and promi- 

 nent, slightly emarginate behind; ocelli also large; face much depressed beneath 

 the antenupe : tips of mandibles black ; antennse not quite as hmg as the head 

 and thorax, luteous yellow, the flagellum opaque : thorax densely and deeply 

 punctui'ed, clothed with a long, thin, yellowish pubescence; mesothorax with 

 four longitudinal impressed lines, the lateral one abbreviated before; metathorax 

 rounded above, rather abrupt on the sides and behind, coarsely reticulated and 

 clothed with a long, thin, whitish pubescence : wings large, yellowish hyaline, 

 slightly varied with pale fuscous, the large.st and darkest mark being on the 

 posterior margin beneath the stigma ; nervures yellowish, stigma fulvous ; mar- 

 ginal cell moderately long, the lower nervure gradually curved to the apex, 

 which is somewhat pointed ; two submarginal cells, the first narrow and elongate, 

 the second rather large and subquadrate, receiving the first recurrent nervure 

 before the middle, the basal nervure angular; legs color of the body, tibiie and 

 tarsi paler, clothed with whitish pubescence; abdomen elongate ovate, petiolate, 

 smooth and jiolished, pointed at tip, clothed with bright yellow pubescence, 

 rather sparse on the second segment and dense and rather long on the apical 

 segments, which are tinged with yellow ; the first or petiole segment elongate, 

 slender at base and dilated towards the tip ; the pubescence on the two basal 

 segments whitish. Length 12-15 mm. ; expan.se of wings 18-23.5 mm. 



Hab. — California. (Baron R. Osten Sacken) Two specimens. 



This is closely allied to P. coucohr, and which differs from this 

 species by the darker coloi', by the hyaline wings, and by the pubes- 

 cence more sparse and entirely whitish ; the pubescence of the ])res- 

 ent species is of a beautiful golden yellow, except on the metathorax, 

 legs and base of the abdomen, where it is whitish. 



