396 PROCEEDINGS OF THE NATIONAL MUSEXJM vol. ue 



9, Myton, Duches Co., June 30, 1958 (J. W. MacSwain) ; 9, Provo (O. E. 

 Johnson) ; 9, Tooele, Aug. 23, 1937 (L. L. Hanson). 



Prey record. — None. 



Plant record. — Croton neomexicanum (New Mexico), Euphorbia 

 sp. (Kansas), Helianthus sp. (Idaho), Solidago sp. (Utah). 



23. Cerceris truncata Cameron 



Figures 28, 126a,b,c 

 Cerceris truncata Cameron, 1890, p. 121. 



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

 closely and deeply pitted; clothed with short silvery hairs, longer 

 on the propodeum. 



Head subequal in width to the thorax; black except for frontal 

 eye patches, clypeal process, lower portion of the clypeus, narrow 

 patch between the antennae, spots back of compound eyes, and base 

 of mandibles, aU of which are very light yeUow; clypeal border with 

 a broad emarginate extension mesad, laterad of which are two much 

 smaller, irregular, denticle-like processes; clypeal process only slightly 

 convex, about as broad as long, with the free border almost straight, 

 smooth, rounded at the corners and amber; mandibles with two 

 small subequal denticles; antennae dark amber except the flagellum, 

 which is somewhat lighter below. 



Thorax black except for a broken band on the pronotum, two 

 spots on the scutellum, the metanotum, two triangular patches on 

 the enclosure, two triangular areas on the propodeum, patch on the 

 tegulae, and small spot on the mesosternal tubercle, all of which are 

 light yellow; tegulae minutely pitted and not elevated; enclosure 

 minutely pitted and faintly rugose transversely; mesosternal tubercle 

 prominent; legs dark amber except for elongate yellow areas on aU 

 tibiae, the fore- and midtarsi; wings subhyaline except for a clouded 

 area along the anterior half and the stigma, which is dark amber. 



Abdomen black except for a broad band on tergum 1, narrow band 

 on terga 2, 4, and 5, lateral spots on tergum 3, sternite 1, and most 

 of sternite 2, small lateral spots on sternites 3, 4, and 5, aU of which 

 are light yellow; elevated area on the anterior part of sternite 3; 

 pygidium somewhat pyi'iform with both ends rounded. 



Male. — Length 9 mm. Black with creamy-yellow marldngs; 

 closely and deeply pitted; clothed with short silvery hairs; longer 

 on the propodeum. 



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

 frontal eye patches, a large central patch on the clypeus, and minute 

 evanescent spots back of the compound eyes, all of which are creamy 

 yellow; clypeal border with a broad extension on the median lobe, 



