24 



U.S. NATIONAL MUSEUM BULLETIN 2 68 



and as far south as San Luis Potosi and San Bias, Nay. It is recorded 

 as far north as Montana and west to the California coast. A record 

 from Berkeley, Calif, may be open to question. In altitude it ranges 

 from 1,500 to 6,500 ft. 



Prey records. — It seems strange that as common as this species 

 is there is no known case where it has been found nesting and the 

 beetles used by it for prey are stiU unknown. 



Plant records. — Acacia angustissima (Arizona). A. greggii (cat- 

 claw) (Arizona). Aplopappus (=Haplopappus) hartwigi (Arizona). 

 Asclepias sp. (Arizona, New Mexico, Texas). Baccharis glutinosa 

 (Arizona, Mexico, New Mexico, Texas). Baileya multiradiata (Ari- 

 zona). B. pauciradiata (New Mexico). Cevallia sinuata (Mexico). 



Figure 9. Western U.S. E. canaliculata 

 canaliculata (Say) 



Ch-aenactis sp. (California). Chrysopsis hirseetissima (New Mexico). 

 Condalia lycioides (Arizona, Texas). Croton corymbulosus (Texas). 

 Eriogonum annum (Texas). Oaillardia pulchella (New Mexico). 

 Gutierrezia lucida (New Mexico). G. micrecephala (Arizona). Hap- 

 lopappus (see Aplopappus). Hymenothrix wislizeni (New Mexico). 

 Koeberlinia spinosa (New Mexico). Lepidium sp. (Arizona, New 

 Mexico). Melilotus alba (New Mexico). Parthanium incanum (Ari- 

 zona). Polygonum sp. (New Mexico), Robima sp. (Texas). Senecio 

 sp. (New Mexico). Salsola pestifer (New Mexico). Sapindus sapo- 

 naria (Arizona). Tamarix gallica (Arizona, California, New Mexico, 

 Oklahoma, Texas), Thelesperma megapotamicum (Arizona, Colorado, 

 New Mexico). Wislizenia refracta (Arizona, California, Texas). 

 Ximensia (Verbesina) encelioides (Texas). 



