WASP GENUS CERCERIS — SCULLEN 371 



band on tergum 3, and narrow bands on terga 4, 5, and 6; venter 

 black, immaculate; pygidium oval with both ends broadly rounded. 



In the male of C. convergens Viereck and Cockerell, the medial 

 lobe of the clypeus is usually black but in many specimens more or 

 less yellow appears on it. In both sexes it is common to find the 

 band on tergum 3 showing slight indentations at the points where 

 it is usually broken. In some cases even these indentations disappear. 



C. convergens Viereck and Cockerell is superficially simUar to 

 several closely related species. The female can be recognized by 

 the clypeal structures and the male by its facial colors and clypeal 

 denticles. Both sexes usually show the breaks in the band on the 

 third tergum of the abdomen. 



Types. — The type female of C. convergens Viereck and Cockerell, 

 from Alamogordo, N. Mex., May 13, 1902 (Viereck), is at the Phila- 

 delphia Academy of Natural Sciences, no. 10376. The type female of 

 C. hespirina Banks, taken at Yakima, Wash., July 1882 (Samuel 

 Henshaw), is at the Museum of Comparative Zoology, Harvard 

 University, no. 10,031. No allotype male was indicated. The type 

 female and allotype male of C. pudorosa Mickel, both taken at Auburn, 

 Calif., Sept. 20, 1916 (L. Bruner), are at Nebraska State University, 

 The type female of C. rinconis Viereck and Cockerell, from Rincon, 

 N. Mex., July 5, at flowers of Chilopses saligna, is at the Philadelphia 

 Academy of Natural Sciences, no. 10386. The lectotype male of C. 

 snowi Banks, from Tucson, Ariz. (Snow), is at the Museum of Com- 

 parative Zoology, Harvard University, no. 13764. 



Distribution. — This is one of the most widely distributed species 

 of the Pacific Slope. It ranges east through the Southern States to 

 eastern Texas. Records of males taken at Sherman Co., Kans., 

 and Yankton, S. Dak., may be open to question. 



Prey record. — Bruchus sp., Alhambra, Calif,, July 14, 1921 (A. O. 

 Larson) , 



Plant record. — Acacia sp. (Arizona, New Mexico), Acacia 

 angustissima (Arizona), Acacia greggii (Ai'izona), Achilles sp. (Idaho), 

 Adenostom sp. (California), alfalfa (Arizona, Utah), Aplopap2^us sp. 

 (Arizona), Asclepias sp. (Arizona, California), Atriplex sp. (Utah), 

 Baccharis sp. (Arizona), Baccharis douglasii (California), Baccharis 

 emeryi (California), Chilopsis saligna (New Mexico), Chilopsis linearis 

 (Arizona), Chrysothamnus sp. (California, Utah), Cissus trijoliata 

 (Arizona), Cleomelia sp. (Idaho), Cleome lutea (Oregon), Condalia sp. 

 (Arizona), cotton (Arizona), Croton californicus (California). 

 Eriogonum sp. (Idaho, Oregon, Utah), Eriogonum (annual, California), 

 Eriogonum eletum (Oregon), Eriogonum fasciculatum (California), 

 Eriogonum fasciculatum 'polifolium (California), FJriogonum gracile 

 (California), Eriogonum injlatum (California), Gaillardia amhlyodon 



