WASP GENUS CERCERIS — SCULLEN 443 



hindfermora, which are black with a large yellow area over the 

 apical third. 



Abdomen as in the nominate subspecies except there is a patch 

 laterally on the posterior border of the second tergum. 



Male. — Length 10 to 11 mm. Black with yellow markings; 

 punctation average ; pubescence short. 



Head subequal in width to the thorax; black except for the entire 

 face, basal two-thirds of the mandibles, and the scape, all of which are 

 yellow; clypeal surface slightly convex; margin of the medial clypeal 

 lobe with three dark denticles; hair lobes broad, extending from the 

 eyes to mesad of the lateral denticles; mandibles with two medial 

 denticles, one above and one below, each on a broad base; antennae 

 normal in form. 



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

 evanescent small spots on the propodeum, and the tegulae, all of 

 which are yellow; tegulae smooth and slightly expanded laterally; 

 mesosternal tubercle prominent and semitruncate ; fore- and hindlegs 

 largely yellow with black areas dorsally on the coxae, trochanter, and 

 basal end of the femora; the hindlegs with the femora largely black 

 but \vith a yellow patch apically; the remaining parts of the hindlegs 

 similar in color to the corresponding parts on the first two pairs of legs ; 

 wings subhyaline but clouded along the anterior border. 



Abdomen with broad posterior bands on terga 1 and 3, tergum 2 

 immaculate except for a trace of yellow laterally; terga 4, 5, and 6 

 with narrow emarginate bands; terga 7 immaculate; sternum black 

 except for an irregular narrow band on sternite 3 and evanescent 

 lateral spots on sterna 4 and 5 ; p.ygidium with sides slightly convex, 

 the apical end truncate and slightly broader than the basal end. 



This subspecies is distinguished from the other subspecies by the 

 blacker legs of both sexes and the more prominent mesosternal process 

 on the male. 



Types. — The type female of O. geniculata Cameron and type male 

 of C. feralis Cameron, both from Mexico, are at the British Museum, 

 nos. 21.1,366 and 21.1,372, respectively. 



Distribution. — This subspecies is primarily a Mexican form but 

 the following records are from near the Mexican border. Specimens 

 are as follows : 



Arizona: ?, Scfcf, Canelo, Santa Cruz Co., July 30, 1956 (G. D. Butler); 

 cf , 8 mi. N. Douglas, 4300 ft., Aug. 7, 1946 (H. A. ScuUen) ; c?, Douglas, 4000 ft., 

 July 30, 1959 (H. E. Evans). 



Prey record. — None. 

 Plant record. — None. 



