G. C. DAVIS. 261 



Two specimens from Windy River, Wyoming, and So. California 

 (types, coll. Amer. Ent. Soc. and Davis). 



MOl^OBLiASTUS Harti?. 

 (Wieo;eiiiniHi's Archiv fiir Natiiifreschichte, Jaliig. 3, H. 2, p. 155-156, 1837.) 

 Head broad, disc shaped, ova] in front, punctured ; clypeus not or 

 indistinctly separated from the front, with deep pits at either side 

 above, punctured, and broadly rounded at apex ; antenna? nearly as 

 long as body and heavy .set. Thorax large, oval, coarsely punctured, 

 parapsides wanting, or only indicated ; pleurae punctured ; scutellum 

 elevated, triangular and with lateral carinpe at ba.se ; inetathorax 

 rugo.se, with carinte usually distinct and complete, or lacking the 

 transverse basal one. Abdomen moderately broad ; basal segment 

 broad, considerably narrowed at base, carinpe present on basal por- 

 tion ; ovipositor short, straight, incrassate at ba,se and usually placed 

 perpendicular along the apex of the last .segment which is often ex- 

 cavated. Legs strong, femora swollen, somewhat short, claws pecti- 

 nate. Wings with strong nervures and a broad, thick, triangular 

 stigma; areolet present, petiolate ; third discoidal cell short, broad; 

 transvei'se median nervure lies back of basal ; humeral cross nervure 

 of hind wing broken much below the middle. 



H*^ad and thorax black. 

 Clypeus black or pieeous ; scutellum black. 



Wings subhyaline; face, basal segment of abdomen and usually the hind 



femora, black obsciirelliis Cress. 



Wings dusky; face with large yellow spot; abdomen and femora rufous. 



punctirroii!^ n. sp. 



Clypeus and face yellow, scutellum usually yellow varifroiis Cress. 



Head and thorax mostly rufous, abdomen and legs entirely so: face yellow ; basal 



segments of abdomen aciculate siciciilatiis n. sp. 



9IoiioblastiiS obsciirelluN Cress. (Erromenus), Pr. A. N. 8. Phil. 1878. .373. 

 % 9- — 6-8 mm. Head and thorax black, with mandibles, palpi and tegulge, 

 yellow or dusky yellowj abdomen rufous, basal segment black, sometimes rufous 

 at apex. % with three or four apical segments pifeous; legs rufous, with coxae, 

 trochanters, and often the femora in part, black; posterior tarsi and apex of tibiae 

 sometimes dusky ; antennse black ; wings subhyaline, nervures and stigma brown, 

 pale at base; the mandibles when closed are almost hidden beneath the clypeus; 

 abdomen excavated behind for the ovipositor; tarsal claws with strong tooth-like 

 spines extending to apex. 



Ten specimens from California, Washington, Colorado and Mon- 

 tana (type, coll. Amer. Ent. Soc). 



flonoblawtiiK piiiictifroii!^ n. sp. 



9. — 8 mm. Head and thorax black ; abdomen and legs rufous, posterior coxae 

 and trochanters pieeous; large circular spot on front, mouth-parts and tegulae, 



TKANS. AM. ENT. SOC. XXIV. SEPTEMBER. 18i)7. 



