WASP GENUS CERCERIS — SCULLEN 385 



the tegulae, which are light yellow; tegulae smooth and not elevated; 

 enclosure minutely rugose transversely, with a prominent medial 

 groove ; mesosternal tubercle present ; legs black or dark amber to the 

 apical ends of the femora, beyond which they are yellow, again 

 becoming darker on the tibiae ; hindfemora may be all black or show a 

 lighter amber apical end; wings subhyaline except for the stigma, 

 which is darker. 



Abdomen black except for a small patch on tergum 1, deeply 

 emarginate band on terga 2 and 4, two lateral patches on tergum 3, 

 which may be joined to each other by a narrow or broken line, solid 

 narrow or broken band on tergum 5 ; pygidium with a broad rounded 

 base narrowing to a much smaller rounded apical end, surface appear- 

 ing velvet-like; venter dark amber, immaculate. 



Male. — Length 7 mm. Black and light yellow; deeply pitted; 

 clothed with short silvery hairs. 



Head about one-fifth wider than the thorax, black except for large 

 frontal eye patches, a patch on the medial lobe of the clypeus, base of 

 mandibles, and scape, all of which are light yellow; clypeal border 

 with three subequal denticles on the medial lobe ; clypeal surface con- 

 vex; mandibles smooth; antennae normal in form, scape yellow, 

 peduncle light amber, flagellum light amber below, darker above. 



Thorax black except for elongate patches on the pronotum, the 

 scutellum, and tegulae, which are light yellow; tegulae smooth and 

 not elevated; enclosure minutely rugose transversely, with a prominent 

 medial groove; legs dark amber apically to the middle of the femora, 

 light amber beyond, becoming darker on the tarsi; wings subhyaline 

 except the stigma, which is amber. 



Abdomen black with small patch on tergum 1, broad band on 

 tergum 2, two lateral patches connected by a broken line on tergum 3, 

 narrow bands on terga 4 to 5, elongate patch on tergum 6, all of which 

 are hght yellow; pygidium oval with both ends rounded and subequal, 

 surface pitted; venter dark amber, immaculate. 



C. kennicottii Cresson is quite variable over its extensive range. 

 It varies in size, shade of yellow, and extent of yellow markings. 

 The yellow markings are more yellow in the Eastern States (C. kenni- 

 cottii kennicottii Cresson) and more white in the southern and western 

 specimens (0. kennicottii belai Scullen). In the Southeast, the female 

 of C. kennicottii kennicottii Cresson is nearest to C blakei Cresson. 

 They can be separated by the reddish amber of C. blakei, by the termi- 

 nal border of the clypeal process, and by the difference in the tegulae. 

 The male of C. kennicottii kennicottii Cresson is close to the male of 

 C. finitima Jinitima Cresson. These usually can be separated by the 

 elevated tegulae on C. jinitima finitima Cresson. In the West, the 

 female of C. kenniccottii beali Scullen can be separated from C. con- 



