40 PKOCEEDINGS OF THE NATIONAL MUSEUM vol. (jU 



Genus CALLIPROBOLA Rondani 



Calliprobola Rondani, Shannon, Proc. Eut. Soc. Wash., vol. IS, p. 108, 1916. 

 Table of species given. 



The genotype, C speciosa Rossi, differs considerably from the 

 American species in the shape of the head. The antennal promi- 

 nence is above the middle of the head and is very noticeably pro- 

 jecting; the face has a gentle tubercle-like swelling and the epistoma 

 projects downwards. In the American species the head is distinctly 

 elliptical; the antennal prominence is but little projecting; the face 

 is concave and the epistoma truncate — just as in Xylota. 



CALLIPROBOLA AEPALIUS (Walker) 



CalUprohola aepaUus (Walker). 

 Brachypalpus so7-osis Williston. 



Walker's type specimen of Xylota aepaUus is in excellent preser- 

 vation. The species has been recorded from New Jersey, North 

 Carolina, and Georgia. 



Type. — In British Museum. 



CALLIPROBOLA CRAWFORDI Shannon 



Male genitalia has been figured by Metcalf. Idaho, Washington, 

 Oregon, British Columbia, California. 

 Type. — In U. S. National Museum. 



CALLIPROBOLA ALDRICHI Shannon 



Male genitalia figured by Metcalf. Mount Ranier, Washington 

 (Aldrich) ; Moscow Mountains, Idaho, June 10, 1920 (Shannon) ; 

 Gold Lake Camp, Plumas County, California, July 19, 1916 (H. G. 

 Dyar). 



Type. — In U. S. National Museum. 



CALLIPROBOLA OPACUS Shannon 



Washington, Alaska. 



Type. — In U. S. National Museum. 



CALLIPROBOLA PULCHER Williston 



Washington, Oregon, Idaho, British Columbia. 

 Type. — In U. S. National Museum. 



Genus POCOTA St. Fargeau and Serville 



Tavo North American species have been assigned to this genus, 

 gra7idis Williston and toinboides Hunter. However, the two prove 

 to be very distinct generically. A comparison of homhoides with 



