

Fossorial Ilymenoptcra of North America. G3 



supra-anal area is narrower and a little smaller than in the species 

 above mentioned. 



Length, .35 inch. 



Kansas, (Norton). 



Differs in the pale yellow legs, the larger square clypeus, and the 

 pale antennae. The specimens of 0. nigrescent I have compared it 

 with, came from Colorado Territory and also the New England 

 States and Canada. 



Cerceris dentifrons, Cresson. 



C. dentifrons, Cresson, Proc. v. p. 124. (1865.) 



Middle States, (Coll. Ent. Soc. Phil.). 



Cerceris deserta, Say. 



C. deserta, Say, Long's 2d Exp. ii, p. 343. (1824.) 



Smith, Cat. Hym. B. M. iv. p. 465. (1856.) 

 Cresson, Proc. v. p. 125. (1865.) 



Mass., (Shurtleff, Coll. Harr., Sanborn). Maine, abundant in Au- 

 gust, with varieties. 



C. imitator, Cresson, Proc. v. p. 125. (1865.) 



As this variety differs only in its coarser sculpturing, not differing in 

 other characters usually of specific value in this group, it is united 

 with the deserta of Say. 



Cerceris compar, Cresson. 



C. compar, Cresson, Proc. v. p. 126. (1865.) 



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



Cercsris fulvipes. Cresson. 



C. fulvipes, Cresson, Proc. v. p. 126. (1865.) 

 Delaware, Illinois, (Coll. Ent. Soc. Phil.) Conn., (Norton). 



Cerceris compacta, Cresson. 



C. compacta, Cresson, Proc. v. 127. (1865.) 



Middle States, (Coll. Ent. Soc. Phil.) New York, District of Co- 

 lumbia, (Norton.) 



Cerceris californica. Cresson. 



C californica, Cresson, Proc. v. p. 128. 



California, Ulke, (Coll. Ent. Soc. Phil.). 



Cerceris Kennicottii, Cresson. 



C. Kennicottii, Cresson, Proc. v. p. 128. (1865.) 

 Louisiana, Kennicott, (Coll. Ent. Soc. Phil.). 



Cerceris insolita, Cresson. 



C. insolita, Cresson, Proc. v. p. 129. (1865.) 



Illinois, Lewis, (Coll. Ent. Soc. Phil.). 



