AMERICAN HYMENOPTERA. 125 



tured. with a well impressed line down the middle, and slightly exca- 

 vated on each side behind ; wings subhyaline, stained with fuscous 

 and subviolaceous towards the apex ; marginal cell lanceolate ; second 

 and third submarginals quadrate, the third much larger than the se- 

 cond, receiving the second recurrent nervure near the base; legs stout, 

 black, subsericeous, clothed with short black pubescence; abdomen 

 subsessile, polished, convex above, clothed with very short black pu- 

 bescence; venter polished. Length 4 i| lines. 



Hab — West Virginia, (Coll. Am. Ent. Soc), 



One % specimen. 



90. Pompilus (Agenia) albopilosus, n. sp. 



]\Ja((:. — Form and color of the preceding species, but the pubescence 

 is rather more dense and is white or ashy instead of black, the vertex 

 has a few black hairs; thorax opaque, the posterior margin of the pro- 

 thorax is angular; wings hyaline, iridescent, slightly smoky at tip; 

 wing-cells much as in the preceding species ; anterior tibiae testaceous 

 in front; abdomen more ovate, subdepressed, polished. Length 05 

 lines. 



i/«^>.— West Virginia, (Coll. Am. Ent. Soc). 



Two % specimens. This may prove to be only a variety of nigro- 

 jyilosus. 



91. Pompilus (Agenia) 'bombycinus, n. sp. 



Female. — Black, subopaque, strongly ashy sericeous, especially 

 strong on the abdomen ; clypeus large, apical margin broadly rounded 

 and recurved; antennae long, slender at tips; prothorax broadly mar- 

 gined posteriorly, the posterior edge angular or subangular; wings 

 hyaline, dusky at tips; marginal cell long, sublanceolate, second and 

 third submarginals about equal in length, the third the largest, slight- 

 ly narrowed towards the marginal and receiving the second recurrent 

 nervure a little before the middle ; legs black, coxfe strongly sericeous; 

 anterior tibiae, and all the tarsi, beneath golden sericeous ; abdomen 

 short, ovate, convex, petiolate, shining, very strongly sericeous; apex 

 with a few long, pale hairs. Length 4^ lines. 



Male. — kSlenderer than the female, with the head and thorax more 

 strongly sericeous; clypeus deeply and broadly emarginate ; metatho- 

 rax with a shallow channel down the middle ; wings darker at tips ; 

 anterior legs brownish; abdomen much smaller than in the 9 ; *^ub- 

 clavate. subdepressed. Length 4|5 lines. 



Ilnh. — West Virginia, (Coll. Am. Ent. Soc). 



One 9 , two % specimens. 



