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PROCEEDINGS OF THE NATIONAL MUSEUM 



vergens Viereck and Cockerell and other closely related species by the 

 differences in the clypeal process. The relative size of the clypeal 

 process on the female varies. The males are difficult or impossible 

 to separate in some cases. 



Types. — The type male of C. kennicottii Cresson, from Louisiana 

 (Robert Kennicott), is at the Philadelphia Academy of Natural 

 Sciences, no. 1952. The type male of C. eriogoni Viereck and 

 Cockerell, from Dripping Sprmgs, Organ Mts., N. Mex., at flowers 

 of Eriogonum (Cockerell), is at the Philadelphia Academy of Natural 

 Sciences, no. 10377. 



Distribution. — Although not taken in any large numbers, this 

 species is recorded from most of the states east of the Rocky Moun- 

 tains, from southern Canada and Massachusetts south to the Gulf of 

 Mexico, and west to Arizona. It is much more common in the South 

 Central States. 



Prey record. — None. 



Plant RECORD. — Acacias^). (Arizona), Cassiasp. (Nebraska, Texas), 

 Ceanothus sp. (Virginia), Chaerophyllum tointurieri (Texas), Chamao- 

 crista fasciculata (Nebraska), Cicuta sp. (Virginia), Cicuta maculata 

 (Colorado, Virginia), cotton (Arizona, Texas), Daucus carota (North 

 Carolina, Ohio, Virginia), Enpatorium sp. (Texas), Euphorbia bicolor 

 (Texas), Euphorbia marginata (Missouri) , Helianthus tuberosa (Kansas), 

 Melilotus alba (Ohio), Pastinaea saliva (Colorado), Solidago sp. (Colo- 

 rado, Texas), Tamarix gallica (Texas), willow (Salix), (Texas). 



Figures 21, 22. — Localities of: 21, C. kennicottii kennicottii Cresson; 22, C. kennicottii 

 beali Scullen. 



18b. Cerceris kennicottii beali, new subspecies 



Figure 22 



Female. — Length 8 mm. Black with creamy-yellow to white 

 marldngs; otherwise, very close to C. kennicottii kennicottii Cresson. 



