AMERICAN HYMENOPTERA. 3 



Scliizooera maura.— ^. — Entirely shining black, head and thorax 

 clothed with a short pale sericeous pile; the bifiuvrite flagellum ciliated 

 beneath with long black pubescence; thorax above subjeneous; scutellum 

 somewhat gjibbous posteriorly, rounded at tip; four anterior tibiae and tarsi 

 dull testaceous ; wings hyaline, iridescent, slightly dusky towards tips, nervurea 

 and stigma black, the latter pale at base, third subraarginal cell quadrangular, 

 narrowed nearly one-half at base, the outer nervure straight; abdomen polished, 

 flattened, especially at apex. Length .25 inch. 

 Hah. — Nevada, (Morrison). 



Schizooera? invita. — 9- — Shining black; mandibles broad at base, 

 acute at lip, with a wide shallow groove above, pale piceous; antennae short, 

 about as long as width of head, slender, gradually narrowed to tip which ia 

 acute; scutellum flat, rounded at tip; tegulse pale piceous ; wings fusco-hyaline, 

 nervures and stigma black, with one marginal, not appendiculate, and three 

 aubmarginal cells, the first more than twice the length of the second, receiving 

 the first recurrent nervure a little beyond the middle, the second submarginal 

 quadrangular, narrowed beneath, receiving the second recurrent near the base, 

 under wing with two middle cells, the upper one sometimes incomplete, the 

 lower one small; knees, tibise and base of tarsi more or less, dull whitish; 

 abdomen subcompressed- Length .20 inch. 

 Hah. — Nevada. (Morrison). 



PTI1,IA St. Farg, 



Ptilia niexicana.^ '^ . — Black, shining; face and clypeus dull testa- 

 ceous; antennae long, slender, fuscous, flagellum bifurcate, densely ciliated 

 with black pubescence; wings fusco-hyaline, darker on costa beyond stigma, 

 nervures black; anterior legs obscurely pale in front: abdomen entirely 

 yellow. Length .25 inch. 



Hah. — Mexico, (Sumichrast). 



IIYLOTOMA Latr. 



Hylotoma niellilia. — 9. — Yellowish-ferruginous, shining; head fus- 

 cous, sometimes black, except middle of face, clypeus and mouth parts; 

 wings yellowish-hyaline, stigma black with a fuscous cloud beneath. Length 

 .40 inch. 



Hah. — Nevada, (Morrison). 



PRISTIPHORA Latr. 



Pristiphora jooularis. — 9. — Black, subsericeous; labrum white; 

 mandibles except tips ferruginous; upper corners of prothorax and tegulse 

 yellowish; wings hyaline, iridescent, nervures and stigma black; legs yel- 

 lowish, posterior femora pale ferruginous, tips of the latter, and of four posterior 

 tibiae, and the posterior tarsi entirely, black; abdomen yellow-ferruginous, 

 basal plates and two apical segments black. Length .26 inch. 



%. — Smaller; most of clyjieus and labrum whitish; antennae more robust 

 than in 9; abdomen above black, the second and third segments yellow- 

 ferruginous. Length .20 inch. 



Hab. — Nevada, (Morrison). 



