WASP GENUS CERCERIS — SCULLEN 



393 



Head about one-fifth wider than the thorax, black except most of 

 face below antennal scrobes, mmute spots back of compound eyes, 

 mandibles except tips, and the scapes, all of which are yellow (in some 

 specimens the lower clypeal border has considerable black) ; clypeal 

 border with three black denticles on the medial lobe; hair lobes 

 normal in width; clypeal surface convex; mandibles smooth except for 

 a single slight elevation, variable in size; antennae normal in form, 

 scape yellow; peduncle dark amber, flagellum light amber below, 

 darker above. 



Figures 26, 27. — Localities of: 26, C. rufinoda rufinoda Cresson (females only); 27, C. 

 rufinoda crucis Banks. 



Thorax black except for two elongate patches on the pronotum, 

 two patches on the scutellum, the metanotum, patch on the pleuron, 

 and the tegulae, all of which are yellow; tegulae elevated to a variable 

 amount and very lightly pitted; enclosure transversely rugose and 

 with a medial groove ; mesosternal tubercles absent ; legs dark amber 

 to amber basally to near the apical end of femora, the remainder of 

 leg parts yellow, becoming darker on the tarsi, amber patch on apical 

 end of hindtibiae ; wings subhyaline, cloudy at apex. 



Abdomen black except first tergum, which is reddish amber with a 

 semidivided yellow patch, tergum 2 with a broad yellow band (basal 

 black may be replaced with amber) , terga 3 to 6 with narrower bands 

 of yellow somewhat emarginate; venter reddish amber anteriorly, dark 

 amber posteriorly; pygidium sides convex with both ends subtruncate. 



The extent of the reddish amber varies considerably in different 

 specimens. Those with the red covering most of the propodeum were 

 described as the variety C. rufinoda crucis by Viereck and Cockerell. 

 The present writer has given this form the rating of a subspecies, but 

 this may be open to question. 



