128 E. T. CRESSON. 



submarginal cell quadrate, wider than long, slightly narrowed toward.s 

 the marginal, receiving the second recurrent nervure in the middle ; 

 anterior legs more or less pale testaceous ; abdomen subpetiolate, sub- 

 cylindrical, subconvex, shining, immaculate. Length 2^ — 8J lines. 



Hah. — New Jersey, West Virginia, (Coll. Am. Ent. Soc. and Mr. 

 E. Norton). 



Five % specimens. Readily distinguished by the beautifully iri- 

 descent wings. 



97. Pompilus (Agenia) mellipes. 



Pompilm me/lipes, Say, Bost. Jour. Nat. Hist, i, p. 304. (1S.S5). 

 Agenia fulvipes, Dahlb., Uym. Eur. i, p. 92. (1845). 

 Femak. — Black, pruinose, clothed with a fine, silvery-cinereous 

 pile, more dense and brilliant on the face, metathorax and coxai ; an- 

 terior orbits sometimes faintly margined with lutcous; palpi whitish; 

 antennae strongly pale sericeous, brownish beneath and at tips above ; 

 posterior margin of the prothorax much depressed and subangular ; 

 metathorax finely impressed down the middle ; wings hyaline, slightly 

 iridescent, faintly tipped with dusky; wing-cells as in Fig. 8, a; legs 

 fulvous, coxBe black, tips of tarsi dusky; abdomen ovate, convex, sub- 

 petiolate, shining, pruinose; apical segment with a smooth, oblong 

 space, surrounded by pale pubescence. Length 4 — i-l lines. 



Male. — More slender than the 9 '■> broad frontal orbits, clypeus, ex- 

 cept a central black streak, the mandibles and the palpi, white; an- 

 tenna; long, filiform, brown-black above, pale testaceous beneath, the 

 basal joint white; the coxaj, except the posterior pair above, are ful- 

 vous ; abdomen sometimes nearly cylindrical, with the apical mai-gins 

 of The segments testaceous, the apical segment more or less whitish, 

 l^ength So — 4 lines. 



Hah. — New York, Maryland, West Virginia, (Coll. Am. Ent. Soc, 

 and Mr. E. Norton). 



Two 9 , two % specimens. 

 98. Pompilus (Agenia) calcaratus, n. sp. 



]\IalK. — Slender, cylindrical, black, clothed with a fine, whitish pu- 

 bescence; clypeus truncate in front, white, with a more or less large 

 black spot at base; mandibles generally with a whitish spot near the 

 tip; palpi pale fuscous; antennae rather short, thick, entirely dull 

 black; prothorax broadly margined posteriorly with white; metatho- 

 rax rounded, and silvery on the sides and behind ; wings hyaline, 

 slightly iridescent, the extreme apex and a faint cloud over the sub- 

 marginal cells, pale dusky ; marginal cell lanceolate; second and third 

 submarginal cells small, subequal, the former quadrate, the latter con- 



