HYMENOPTERA. 157 



190. POMPILUS FLAVIPENNIS. 



Calicurgus flavipennis, St. Farg. Hym. iii. 407. 14. 

 Hab. Cayenne. 



191. POMPILUS AMERICANUS. B.M. 



Pompilus Americanus, Palis, de Eeauv.Ins. Afric. et Amtr. p. 1 17. 



t. 3. f. 6. 

 Pompilus trifasciatus, Palis, de Beauv. Ins. Afric. et Amer. p. 118. 



t. 3. f. 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. POMPILUS ATRAMENTARIUS. B.M. 

 Pompilus atramentarius, Dahlb. Hym. Europ. i. 48. 



Hab. North America. 



193. POMPILUS ATROX. 



Pompilus atrox, Dahlb. Hym. Europ. i. 63. 

 Hab. South Carolina. 



194. POMPILUS ARCHITECTUS. B.M. 

 Pompilus (Agenia) architectus, Say, Bost. Journ. i. 303. 2 J . 

 Hab. United States (Ohio) ; Hudson's Bay. 



195. POMPILUS APICULATUS. B.M. 



Female. Length 4 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, coxae 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 tibiae and tarsi have a 



