62 Dr. A. S. Packard, Jr's Revision of the 



Cerceris flavocostalis, Cresson. 



C. flavocostalis, Cresson, Proc. iv. p. 153 ; v. p. 123. (1865.) 



Cuba, Guudlach. 



Cerceris triangulata, Cresson. 



C. triangulata, Cresson, Proc. iv. 154 ; v. p. 123. (1865.) 

 Cuba, Guudlach. 



Cerceris bilunata, Cresson. 



C. bilunata, Cresson, Proc. iv. p. 155; v. p. 123. (1865.) 



Cuba, (Coll. Ent. Soc. Phil.). 



Cerceris festiva, Cresson. 



C. festiva, Cresson, Proc. iv. p. 156 j v. p. 123. (1865.) 

 Cuba, Guudlach. 



Cerceris cubensis, Cresson. 



C. zonata, Cresson, Proc. iv. p. 156. (1865.) 

 C. cubensis Cresson, Proc. v. p. 123. (1865.) 



Cuba, (Coll. Ent. Soc. Phil.). 



Cerceris nigrescens, Smith. 



C. nigrescens, Smith, Cat. Hym. B. M. iv. p. 466. (1856.) 

 Cresson, Proc. v. p. ] 23. (1S65.) 

 Nova Scotia, (Smith). Canada West, Sauuders. Rocky Mountains, 

 Colorado Territory, (Coll. Ent. Soc. Phil.). " North Conway, N. H., 

 Aug, 7." Harris, (Coll. Harr.). 



Cerceris occipitomaculata, n. sp. 



% . Head more highly polished than in C. nigrescens, to which it i8 

 most closely allied ; orbits paler yellow than in nigrescens but with the 

 same arrangement of colors ; inter-antennal ridge covered with a yellow 

 triangular spot; clypeus very square, angular, depressed, being much 

 larger, longer, front edge very slightly excavated, minutely dentate, 

 six-sided, sides angular. Mandibles yellow, black at tip; scape yel- 

 low beneath, black above, flagellum pale mahogany reddish, beneath ; 

 brownish-black above, tips above pale, somewhat yellowish. Body 

 marked as in C. nigrescens, but the spots and bands are consider- 

 ably heavier; occiput laterally with a yellow spot. Two heavy yellow 

 spots on the prothorax, meso-scutum hairy and more thickly punctured 

 than in C. nigrescens, post-scutellum yellow; enclosure very minutely 

 and fiuely striated, much more so than in C. nigrescens ; posteriorly 

 the propodeum is not striated, though as coarsely punctured as 

 in the preceding species ; tegulae entirely yellow, where in the other 

 species they are partially black behind. Wings the same. Femora 

 yellow, fore pair blackish behind; hind pair reddish at tip, tibiaj 

 yellow, hind tibioe fuscous at tip ; tarsi yellow, hind tarsi fuscous. 

 Abdomen marked and punctured much as in C. nigrescens, but the 



