406 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iie 



genae bordering the compound eye, all of which are yellow; clypeal 

 surface without elevations except two minute clypeal surface denticles 

 just above the margin; clypeal margin with four denticle-like exten- 

 sions, the lateral ones somewhat more acute than the two medial ones, 

 which are definitely rounded; mandibles with two centrally located 

 denticles, the basal one being the larger and more acute; antennae 

 normal in form. 



Thorax black, except for two wide patches on the pronotum, small 

 spots on the scutellum, the metanotum, patches on the propodeum, 

 and patches on the pleuron, all of which are yellow; enclosure deeply 

 ridged; mesosternal tubercle absent; legs yellow except for irregular 

 patches on the dorsal sides of the femora and limited uregular areas 

 on the coxae and trochanters; wings subhyaline. 



Abdomen: tergum 1 with lateral yellow patches; tergum 2 yellow, 

 which all but surrounds a black area connected with the black an- 

 terior border; terga 3, 4, and 5 deeply emarginate anteriorHy with a 

 black area; tergum 6 yellow, exclusive of the pygidium, which is 

 amber; venter largely yellow; pygidium pyriform with the apical end 

 rounded. 



Male.— Length 11 to 15 mm. The type is smaller than most 

 specimens examined by the author. Black with yellow markings; 

 normaUy pitted; clothed with short silvery haks, which are somewhat 

 longer m the region of the propodeum and the first abdominal segment. 



Head slightly wider than the thorax; black except the entire face 

 below the antennae, large patch on the scape, and the base of the 

 mandibles, all of which are yellow; clypeal surface slightly convex; 

 clypeal border slightly extended from the medial portion and some- 

 what sinuate; mandibles without denticles; antennae with apical 

 segment sHghtly curved. 



Thorax black except widely separated patches on the pronotum, 

 the tegulae, and a divided band on the scutellum, all of which are 

 yellow; enclosure lightly ridged in the lateral angles; mesosternal 

 tubercle absent; legs mostly black to near the middle of the femora, 

 beyond which they are yellow; wings subhyaline but somewhat 

 clouded along the anterior border; stigma light amber. 



Abdomen: tergum 1 black; tergum 2 yellow with a broad black 

 patch in the center and a black anterior margm; terga 3 and 4 with 

 yellow partly surrounding a broad black area in the center; terga 5 

 and 6 largely yellow but deeply emarginate with black anteriorly; 

 tergum 7 with yellow patches to the sides of the pygidium; venter 

 largely yellow; pygidium with sides slightly convergmg to a truncate 

 apical end. 



The female is here described for the first time. C. completa Banks 

 closely resembles the darker specimens of C. californica Cresson, 



