442 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iie 



sides slightly convex; and the truncate apical end somewhat wider 

 than the basal end. 



C. compar Cresson was described from the male. From specimens 

 of females determined as C. compar by H. S. Smith at the University 

 of Nebraska, it would appear that Smith was in error in his determina- 

 tion of the females of this species. The writer has accepted the 

 determination of Bridwell, Banks, and others as the correct form. 

 So far as the writer can determine, the two sexes have not been taken 

 associated. 



The males of C. compar compar Cresson are very close to the males 

 of C. zelica Banks. At present they are not separable with any 

 conclusiveness. 



Types. — The type male of C. compar Cresson, from Illinois, is at 

 the Philadelphia Academy of Natural Sciences, no. 1949. The type 

 male of C. jucunda Cresson, from Texas, is at the Philadelphia Acad- 

 emy of Natural Sciences, no. 1716. The type male of C. jucunda 

 Carolina Banks, from Southern Pines, N.C., is at the Museum of Com- 

 parative Zoology, Harvard, no. 13785. The type female and allotype 

 male of C. catawha Banks, from Southern Pines, N.C., are at the 

 Museum of Comparative Zoology, Harvard, no. 13787. 



Distribution. — This species is found in limited numbers in most 

 states east of the Rocky Mountains. 



Prey record. — None. 



Plant record. — Apocynum cannahinum (West Virginia), Asclepias 

 sp. (New Mexico), Berteroa incana (Massachusetts), Ceanothus sp. 

 (North Carolina), Chinquapin (Vii'gmia), Cicuta maculata (Iowa), 

 Colubrina texensis (Texas), Hydrangea arborescens (North Carolina), 

 Kochia sp. (North Carolina), Melilotus alba (Kansas), Pastinaca sativa 

 (New York), Polytaenia nuttallii (Texas), Queen Anne's lace (Ohio), 

 rose (Nebraska), Trifolium sp. (North Carolina), Solidago sp. (Connect- 

 icut), Spiraea (Connecticut), Umbelliferae (Massachusetts). 



40b. Cerceris compar geniculata Cameron 



Figure 56 



Cerceris geniculata Cameron, 1890, p. 113. — Dalla Torre, 1897, p. 462. — Ashmead, 



1899, p. 296. 

 Cerceris feralis Cameron, 1890, pp. 113-4. — Dalla Torre, 1897, p. 459. — Ashmead, 



1899, p. 296. 

 Cerceris compar geniculata Scullen, 1962, p. 57. 



Female. — Length 10 to 11 mm. Structurally like C. compar 

 compar Cresson except for the variations in color pattern as indicated 

 below ; it averages slightly larger than the latter subspecies. 



Head in all respects like that of the nominate subspecies. 



Thorax in all respects like the nominate subspecies except the 



