WASP GENUS CERCERIS — SCULLEN 



409 



gonia, Ariz., is at the Museum of Comparative Zoology, Harvard, 

 no. 27620. 



Distribution. — This species has been taken from southern Arizona, 

 through southern New Mexico, and southern Texas. It ranges south 

 through Mexico and Central America and into South America. 



Prey record. — None. 



Plant record. — (AU from Arizona) Acacia sp., Baccharis glutinosa, 

 Cephalanthus sp., Chilopsis linearis (desert willow), Cissus trifoliata, 

 Condalia lycioides, Croton sp,, Erigeron canadensis, Eriogonum sp., 

 Lepidium sp,, Melilotus alba, Prosopis sp. (mesquite), Sapindus 

 saponaris, Wislizenia refracts (jackass clover). 



Figures 34, 35. — Localities of: 34, C. dilatata dilatata Spinola; 35, C. dilatata chisosensis 

 ScuUen. 



27b. Cerceris dilatata chisosensis, new subspecies 



Figure 35 



Female. — Length 13 mm. Black with reddish-amber and brown- 

 ish-yellow markings; structurally like C. dilatata dilatata Spinola but 

 colors depart from the typical subspecies by having considerable 

 reddish amber covering most of the propodeum exclusive of the 

 enclosure, the first abdominal segment, and extending onto the second 

 tergum. The legs are amber and not black. Color marking otherwise 

 more extended as indicated below. 



Head black except for two large frontal eye patches and most of the 

 medial clypeal lobe, base of mandibles, and the antennal scape, all of 

 which are brownish yellow; clypeal margin and clypeal surface 

 denticles are amber. 



Thorax black except for two elongate patches on the pronotum, 

 the tegulae, and the metanotum, which are brownish yellow to amber, 

 and the propodeum, which is largely reddish; enclosure black; legs 

 amber; wings clouded with light amber. 



