AMERICAN HYMENOPTERA. 255 



Descriptions of new North American HY9IENOPTERA in 

 tlie collection of the American Entomological Society. 



BY E. T. CRESSON. 



Family EVANIID^. 



Aniaens occiclentalis. — 9.— Black; head subquadrate, broad behind 

 eyes, vertex finely rugulose, behind ocelli feebly punctured; occiput some- 

 times tinged with ferruginous; mouth more or less dull yellowish; antennae 

 as long as thorax and abdomen, scape ferruginous beneath ; thorax transversely 

 wrinkled; middle lobe of mesothorax gibbous, emarginate, rounded in profile; 

 seutellum almost smooth ; wings stained with yellowish fuscous, with a brilliant 

 violaceous reflection, a subquadrate blackish cloud beneath stigma, sometimes 

 extending indistinctly beneath second submarginal cell, extreme apex of 

 anterior wings fuliginous; legs ferruginous, tibise and tarsi generally paler, 

 coxae and trochanters black; abdomen as long as head and thorax, polished, 

 ferruginous, apical segments more or less black; ovipositor as long as body. 

 Length .55 — .60 inch. 



Va7\— ^ . — Head except band across vertex sometimes obsolete, scape, middle 

 lobe of mesothorax, metathorax more or less, spots on pleura, and legs entirely, 

 ferruginous. Length .50 — .60 inch. 



Var. — 9. — Body and legs entirely pale ferruginous, antennae except basal 

 joint black. Length .55 inch. 



Ifah. — Colorado, Nevada, (Morrison). Fifteen specimens. A fine 

 large species, varying greatly in color. 



Aulacus melleus. — 9* — T^3,\e ferruginous, shining; face roughened, 

 vertex and occiput feebly punctured; tips of mandibles and palpi black; 

 antennse as long as the body, black, basal joint ferruginous; mesothorax trans- 

 versely wrinkled, the middle lobe gibbous, emarginate, rounded in profile, 

 lateral lobes with a longitudinal deeply impressed line ; seutellum subobsoletely 

 wrinkled ; wings yellowish-hyaline, with a slight violaceous reflection, a square 

 violaceous black mark beneath stigma, extreme apex of anterior wing also 

 black; posterior coxse smooth and polished, incisure between posterior tro- 

 chanters black; abdomen longer than head and thorax, the petiole being 

 unusually long and slender; ovipositor much longer than body. Length 

 .60— .65 inch. 



Hub. — Nevada, (Morrison). Two specimens. Closely resembles 

 the ferruginous variety of occidentalism but the antennae, abdomen and 

 ovipositor are longer than iu that species, and the wings are without 

 the brilliant violaceous reflection. 



Aulacus consors. — %. — Black; face pubescent, vertex and occiput 

 smooth and shining, mouth and scape beneath pale ferruginous; mesothorax 

 and seutellum transversely wrinkled, the anterior lobe gibbous, slightly emar- 

 ginate, rounded in profile, side lobes with a longitudinal impressed line; wings 

 yellowish hyaline, with a subquadrate violaceous black spot beneath stigma, 

 extreme tips -of wings dusky; legs ferruginous, posterior coxse mostly black; 



