WASP GENUS CERCERIS — SCULLEN 447 



The males of these species may be separated by the form of the 

 pygidium and the females by the clypeal processes. 



Types. — The type male of C. insolita Cresson, from Illbaois, is at 

 the Philadelphia Academy of Natural Sciences, no. 1954. The type 

 female of C. intractibilis Mickel, from Child's Point, Nebr., July 14, 

 1915 (E. M. Partridge), is at the University of Nebraska. 



Distribution. — Throughout the Central and Eastern States. 



Prey record. — None. 



Plant record. — Achillea sp. (Texas), Ambrosia psilostachya 

 (Mississippi), Ampelopsis arborea (Texas), cotton (Texas), Eupatorium 

 (Texas), Hydrangea arborescens (North Carolina), Melilotus alba 

 (Florida), peach (Mississippi), Bhus glabra (Florida), Solidago 

 (Kansas), sumac (Texas), Tamarix gallica (Kansas). 



41b. Cerceris insolita albida, new subspecies 



Figure 59 



Female. — Length 10 mm. Black with creamy-white markings; 

 structurally like the nominate subspecies C. insolita insolita Cresson 

 except for the color and extent of the markings. 



Head black except for the face below the antennal scrobes, with an 

 irregular dark line about the base of the clypeal elevation, small spot 

 back of the eye, basal half of the mandibles, and a patch on the scape, 

 all of which are creamy white. 



Thorax black except for two elongate patches on the pronotum, 

 band on the scutellum, evanescent patches on the metanotum, patches 

 on the propodeum, and a small patch on the tegulae, all of which are 

 creamy white; legs black to fuscous on the two basal segments, the 

 femora fulvous to black with creamy-white markings, and the more 

 apical segments creamy white, fulvous, and fuscous in variable 

 amounts. 



Abdomen with a medium width band on terga 1 and 3, narrow bands 

 on terga 4 and 5, evanescent small patches on the lateral posterior 

 angles of tergum 2; bands on terga 3, 4, and 5 deeply emarginate; 

 venter immaculate; pygidium fulvous. 



Male. — The color and color patterns of the male follow those of 

 the female with the exception that the entire face is creamy white and 

 bands of creamy white appear on sternites 3, 4, 5, and 6; the band on 

 tergum 3 is inclined to be less emarginate on the male than on the 

 female. Structural characters other than the colors are the same as 

 for the nominate subspecies. 



Types. — The type female and allotype male, from Las Cruces, N. 

 Mex., 3880 ft. elevation, June 18, 1942 (H. A, Scullen), are at the 

 U.S. National Museum, no. 66168. Paratypes are as follows: 



