NORTH AMERICAN HYMENOPTERA. 275 



PhotopsiN nebiiIo$«u!^ n. s]i. 



Male. — Uuiform honej' yellow ; head rounded, not as wide as the thorax, mod- 

 erately densely clothed with long, glittering whitish hairs, closely punctured, 

 shining ; eyes large, polished ; tips of mandibles black, scape of antennae clothed 

 with sericeous honey yellow pubescence ; thorax elongate ovate, pro- and meso- 

 thorax finely punctured, clothed with glittering, erect honey yellow pubescence, 

 metathorax roundly truncate, coarsely reticulate, thinly clothed witli long, erect, 

 white hairs ; lateral declivities deep, polished ; wings hyaline, having a fuscous 

 cloud in the third discoidal and first apical cells, the marginal cell ovate, roundly 

 pointed at tip, first submarginal narrow and pointed at base, second short, sub- 

 quadrate, receiving the first recurrent nervure about the middle, third nearly 

 obsolete, narrowed beneath and receiving the second recurrent nervure before 

 the middle, stigma moderate, its apical two thirds being within the marginal 

 cell; tegulse small, honey yellow; legs: femora fuscous, thinly clothed with 

 glittering white hairs, tibise and tarsi honey yellow, clothed with shorter hairs ; 

 abdomen ovate, shining, minutely punctured, clothed above with erect, pale 

 yellowish hairs; basal segment campanulate. subsessile with the second and hav- 

 ing on each side a minute tubercle ; apical margins of segments fringed with 

 pale yellowish above, shining. Length 13 mm. ; expanse of wings 24 mm. 



Hub. — Southern California. 



Pliotopsijii abdoiiiiiialis u. sp. 



Male. — Dark honey yellow ; head subquadrate, posterior angles rounded, 

 shining, minutely punctured; eyes and ocelli prominent, a rounded tubercle 

 beneath the eyes, mandibles densely and finely punctured, clothed with yellow 

 pubescence; antennje fulvo-ferrugiuous; thorax ovate, thinly clothed with white 

 pubescence, mesothorax minutely punctured and having two impressed longitu- 

 dinal lines on the disc, metathorax obliquely ti'uncate, covered with broad, 

 shallow reticulations ; lateral lobes coarsely and confluently punctured ; wings 

 hyaline, faintly iridescent ; marginal cell short, broadly ovate, truncate at tip, 

 first submarginal elongate, second subquadrate, pointed to base, receiving the 

 first recurrent near the base, third narrowed beneath, its outer nervure nearly 

 obsolete, stigma large, fuscous ; nervures of all the wings fuscous ; tegulaj pale 

 honey yellow ; legs obscure honey yellow, posterior femora and tibi« fuscous, 

 clothed with glittering white hairs; abdomen elongate ovate, thinly clothed 

 with erect, glittering white hairs; basal segment campanulate, subsessile with 

 the second, shining, with a few minute punctures; second segment polished, its 

 apical margin fringed with short, silvery pubescence, the remaining segments 

 broadly fuscous, apically, shaded with pale honey yellow basally, ventral surface 

 same as above. Length 10 mm. ; expanse of wings 18 mm. 



Hab. — Colorado. 



Photopsis pallida Blake. 



Male. — Uniform pale honey yellow ; sparsely clothed with yellowish white 

 hairs; head rounded, feebly punctured ; eyes and ocelli round, prominent ; an- 

 tennfe nearly as long as the head and thorax ; thorax : pro- and mesothorax 

 finely punctured, shining ; metathorax rounded, broadly reticulate, with a smooth, 

 shining space at middle; tegulse small; wings moderate, hyaline, marginal cell 

 rather broadly lanceolate, first submarginal long and narrow, second obliquely 

 subquadrate, pointed towards the base, its basal nervure slightly sinuate and 



