WASP GENUS CERCERIS — SCULLEN 435 



on the clypeal margin bicuspidate. (3) The pygidium of the male 

 is very broad, ahnost oval. (4) The hair lobes of the male are very 

 broad, almost meeting medially. (5) Tenebrionidae are used as 

 prey by both species. 



38a. Cerceris femurrubrum femurrubrum Viereck and Cockerell 



Figures 51, 53, 140a,b,c,d,e,f 



Cerceris femurrubrum Viereck and Cockerell, 1904, p. 135. — Viereck, 1906b, 

 p. 234.— Mickel, 1917b, p. 451.— Banks, 1947, p. 15.— ScuUen, 1951, p. 

 1007; 1960, p. 78. 



Cerceris thione Banks, 1947, pp. 18-19. — ScuUen, 1951, p. 1007. 



Female. — Length 12 mm. Amber with light yellow markings, 

 very Uttle black; structurally Uke C. Jemurrubrum athene Banks in 

 all respects, except for color. 



Head all but totally amber except for a variable amount of yellow 

 on the face mesad of the eyes. 



Thorax all amber to dark amber except for variable amounts of 

 yellow on the prothorax, the scutellum, the metanotum, the propo- 

 deum, and the pleuron. 



Abdomen amber with subequal emargmate bands on the terga 

 along the posterior margins, aU of which are yellow; venter amber. 



Male. — Length 11 mm. Black with creamy-white markings and 

 some amber parts; punctation and pubescence average. 



Head sUghtly \vider than the thorax; black except for the face, 

 basal half of mandibles, very small spot back of the eye, and the scape, 

 all of which are creamy white ; clypeal margin with four denticles, the 

 medial pair being fused at the base ; hair lobes very broad, extending 

 from the lateral denticles to the eyes; clypeal process surface slightly 

 convex; mandibles with one prominent denticle; apical antennal 

 segments blunt and shghtly curved; antennae amber except for a 

 yellow patch on the scape. 



Thorax black except for a divided band on the pronotum and an 

 emarginate or divided band on the scutellum, an evanescent patch on 

 the metanotum, patches on the propodeum, patch on the pleuron, 

 and the tegulae, all of which are creamy white; tegulae low and 

 smooth; enclosure smooth except for a prominent medial groove and 

 lateral pits; mesosternal tubercles absent; legs variable in color, fore- 

 legs hght to dark amber basally to the apical part of femora, beyond 

 which they are creamy white; midlegs largely creamy white except 

 most of the femora, which are hght to dark amber; hindlegs hght to 

 dark amber except the coxae, trochanter, basal part of tibae, and most 

 of the tarsi, all of which are creamy white; wings subhyaline, slightly 

 clouded toward the apex. 



