HYMENOPTERA, 157 
190. PoMPILUS FLAVIPENNIS. 
Calicurgus flavipennis, St. Farg. Hym. iii. 407. 14. 
Hab. Cayenne. 
191. PomprLus AMERICANUS. B.M. 
Pompilus Americanus, Palis. de Beauv. Ins. Afric. et Amé. p. 117. 
Toot. 0, 
Pompilus trifasciatus, Palis. de Beauv. Ins. Afric. et Amé. p. 118. 
ted. £. 6. 
Pompilus plebejus, Dahlb. Hym. Europ. i. 60. 
Hab. North America. 
This species is very closely allied to P. viaticus, of which it 
may be considered the American form ; it differs in having the 
posterior margin of the prothorax angulated, and in the basal 
segment gradually declining to its base. 
192. PomMpILUS ATRAMENTARIUS. B.M. 
Pompilus atramentarius, Dahlb. Hym. Europ. i. 48. 
Hab. North America. 
193. PomMPILUS ATROX. 
Pompilus atrox, Dahlb. Hym. Europ. i. 63. 
Hab. South Carolina. 
194. PoMPpILUS ARCHITECTUS. B.M. 
Pompilus (Agenia) architectus, Say, Bost. Journ. i. 303.29. 
Hab. United States (Ohio); Hudson’s Bay. 
195. PomprmLus APICULATUS. B.M. 
Female. Length 43 lines.—Head, thorax and legs black ; the 
abdomen red; the entire insect covered with a fine white silky 
pile, most dense on the face, cheeks, coxee and metathorax ; 
the clypeus rounded at its anterior margin. Thorax: the 
posterior margin of the prothorax having a band of silvery 
pile, a spot of the same on each side of the scutellum and post- 
scutellum ; the metathorax rounded, and having a longitudinal 
slightly impressed line ; wings fusco-hyaline, the first recurrent 
nervure entering the second submarginal cell in the middle, the 
third submarginal cell subpetiolate ; the tibiz and tarsi have a 
