WASP GENUS CERCERIS — SCULLEN 373 



border with three small denticles, the medial one the largest; hair 

 lobes subequal to the lateral clypeal lobes; mandibles without denticles; 

 antennae normal in form, fulvous but slightly darker above. 



Thorax black except for a divided band on the pronotum, the 

 metanotum, a minute spot on the pleuron below the wing, and a patch 

 on the tegulae, all of which are creamy white; tegulae smooth and not 

 elevated; enclosure deeply ridged subparallel to the metanotum; meso- 

 sternal tubercles absent; legs black basally to near the apical ends of 

 the femora, which are creamy white; tibiae and other apical segments 

 creamy white except for the apical half of the 3rd tibia, which is dark 

 I'uscous to black; the light tip of the 3rd femur cut off from the dark 

 area abruptly at right angles to the femur as in C. acanthojphila 

 Cockerell; wings subhyaline but clouded apically; stigma dark. 



Abdomen black with a small semidivided spot on tergum 1, a broad 

 band on the posterior half of tergum 2, narrow bands on the posterior 

 margins of terga 3, 4, and 5, and a small patch on tergum 6, all of 

 which are creamy white; venter black, immaculate; pygidium with 

 sides convex and both ends rounded. 



The male is very near that of C. acanthophila Cockerell, from which 

 it may be distinguished by a creamy-white face and the relatively 

 smooth enclosure of the latter species. 



Types. — The type female from Tucson, Ariz., June 13, 1938, 

 (R. H. Crandall), is deposited at the U.S. National Museum, 

 no. 66156. The allotype male, from 8 miles southeast of Elota, 

 Sinaloa, Mexico, 1962 (F. D. Parker), is deposited at the University 

 of Cahfornia, Davis, Calif. 



Arizona: ? , 10 mi. E. Gila Bend, June 15, 1955 (G. D. Butler); 4 ? 9 , 2 mi. 

 NE. Portal, Cochise Co., July 30- Aug. 5, 1959, Baccharis (M. Statham); $, 

 Sahuarita, July 5, 1956 (G. D. Butler) ; 3 9 9 , Toltec, Pinal Co., June 14-15, 

 1953 (T. R. Haig); 9, Tombstone, July 27, 1955, Mortonia scalrella (Butler- 

 Werner); 2 9 9, Tucson, June 10, 13, 1938 (R. H. Crandall); 9, Tucson (F. H. 

 Snow). Texas: 9, Boquillas, Brewster Co., June 30, 1928 (F. M. Gage); 9, 

 20 mi. N. El Paso, June 19, 1942 (H. A. Scullen). Mexico: Sinaloa: 59 9, 

 16c? d^, 8 mi. SE. Elota, May 18-19, 1962 (F. D. Parker, L. A. Stauge); 2 9 9, 

 3cf d^, Cocorit, May 23, 1962 (F. D. Parker, L. A. Stange) ; 9 , 2cf cf', 5 mi. S. 

 Magdalena, May 25, 1962 (F. D. Parker, L. A. Stange); 9 , d^, 5 mi. W. Santa 

 Ana, June 10, 1962 (F. D. Parker). 



Distribution. — Southern Arizona, western Texas, and northwest- 

 ern Mexico. 



Prey record. — None. 



Plant record. — Baccharis (Arizona), Mortonia scalrella (Arizona). 



