520 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iie 



Distribution.' — Southern North Dakota and eastern Wyoming. 

 Prey record. — None. 



Plant record. — Cleome serrulata (Wyoming), Ei^iogonum annuum 

 (North Dakota). 



Unrecognized Species 



Owing to the inadequate description and lack of types, the following 

 species is unrecognizable at present. 



78. Cerceris townsendi Viereck and Cockerell 



Cerceris townsendi Viereck and Cockerell, 1904, p. 140. — ScuUen, 1951, p. 1010. 



Female.' — Length 7 mm. Black with yellow markings. The in- 

 adequate description does not include mention of the clypeal struc- 

 tures nor several other characters found useful by the present writer. 

 From its size, it would appear to belong to Group I; however, the 

 "testaceous" stigma makes its position uncertain. 



Type.' — The type female, from Las Cruces, N. Mex. (Townsend), 

 should be at the Philadelphia Academy of Natm-al Sciences, but it 

 is not included in the list of types published by E. T. Cresson, Jr. 

 (1928), and the writer has been unable to find it at the above insti- 

 tution. The species is known only from the published description. 



Prey record. — None. 



Plant record. — None. 



Species of Cerceris 



Valid names appear without parentheses: synonyms, with; names 

 of species changed in status from the original by this or previous 

 publications are in brackets. Page numbers of principal references 

 are in itaUcs. 



{abbreviata Banks), 497, 498 



acanihophila Cockerell, 346, 352, S55-357, 364, 365, 373, 390 



aequalis aequalis Provancher, 344, 350, 452-453, 454, 494, 497, 511, 514 



aequalis bolingeri ScuUen, 344, 452, 453-454 



aequalis idahoen&is Scullen, 344, 454-455 



(alacris Mickel), 483, 484 



(alaope Banks), 474, 475 



alceste Mickel, 343, 454, 455-456 



(ampla Banks), 438, 439 



(arbuscula Mickel), 458, 459 



iarchitis Mickel), 336, 483, 484 



[arelate Banks], 495, 496 



argia Mickel, 346, 351, 357-359, 394 



(argyrotricha Rohwer), 404, 405 



arizonella Banks, 352, 357, 359 



{arno Banks], 404, 405 



