498 PROCEEDINGS OF THE NATIONAL MUSEUM vol. lie 



The type of C. ahhreviata Banks, taken at "Yakima City, W. T., July 2, 

 3, 4, '82," is at the Museum of Comparative Zoology, Harvard, no. 

 13794. 



Prey record. — None. 



Plant record. — California: Adenostoma sp., Chrysothemnus 

 viscidiflorus typicus, Eriogonum fasciculatum, E. nudum, Helianthus 

 sp., ladino clover, Lotus americanus, Melilotus alba, Phacelia sp.. 

 Polygonum auherti, Salix sp., Solidago sp., *S'. californica, Trifolium sp. 

 NEVADA: Chrysothamnus sp. 



64. Cerceris nitida Banks 



Figures 92, 172a,b,c 



Cerceris nitida Banks, 1913b, p. 424, fig. 9.— Mickel, 1917b, p. 454.— ScuUen, 1951, 

 p. 1009. 



Female. — Length 9 mm. Black with Hght yellow markings; 

 punctations more limited than average; pubescence very short; 

 slightly more shiny than the average. 



Head shghtly wider than the thorax; black except the large frontal 

 eye patches, most of the clypeus, evanescent small spot back of the 

 eye, and the base of the mandibles, all of which are very Hght yellow; 

 clypeal border with five distinct denticles subequally spaced on the 

 medial lobe; clypeal elevation low, acute, depressed, and fuscous; 

 entire clypeal margin and area below the clypeal elevation fuscous; 

 mandibles with three low denticles, the basal one very small; antennae 

 normal in form, fuscous over the scape, peduncle, and the upper 

 surface of the flagellum, the latter hght below. 



Thorax black except for a divided band on the pronotum, evanes- 

 cent spots on the scutellum, the metanotum, and a patch on the 

 tegulae, all of which are hght yellow; tegulae low and smooth; en- 

 closure with a medial groove, the surface relatively smooth and with 

 pits along the lateral margins; mesostemal tubercle very small; legs 

 black to near the apical ends of the femora, except the hindtrochanter, 

 which is light yellow; apical end of the fore- and midfemora are 

 yellow; apical ends of the hindfemora are ferruginous and the more 

 apical segments of all legs are largely yellow with darker patches; 

 wings subhyaline with the apical region clouded. 



Abdomen with a semidivided small patch on tergum 1 and with 

 subequal emarginate bands on terga 2 to 5; venter with light yellow 

 lateral patches on sternite 3 and small evanescent spots on sternite 4; 

 pygidium elongate oval with the apical end rounded and the basal end 

 narrow. 



Male. — Length 8 mm. Black with light yellow markings; puncta- 

 tion very limited; pubescence very short; body shiny. 



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



