WASP GENUS CERCERIS — SCULLEN 



357 



Figures 1-3. — Localities of: 1, C. acanthophila Cockerell; 2, C. argia Micliel (females only); 

 3, C. arizondla Banks. 



2. Cerceris argia Mickel 



Figures 2, 109a,b,c 

 Cerceris argia Mickel, 1916, p. 412; 1917b, p. 453.— Scullen, 1951, p. 1005. 



Female. — Length 9 to 10 mm. Black with yellow markings except 

 the propodeum and the basal end of the abdomen, which are reddish 

 amber; more closely and finely pitted than most species; clothed with 

 short silvery hairs. 



Head about one-sixth wider than the thorax, normally pitted, clothed 

 with very short silvery hairs; front yellow below the antennae except 

 for the anterior third of the clypeus, which is amber; occiput immacu- 

 late, black in the type (many specimens show two converging, elongate 

 yellow patches); genae black with a yellow spot back of each com- 

 pound eye; clypeal border irregularly sinuate; clypeal process low 

 with a single rounded end pointing ventrad, yellow with the free 

 border amber; mandibles with two separated, centrally located sub- 

 equal denticles, yellow at the base, amber apically; antennae normal in 

 form, yellow area on scape, peduncle amber, flagellum hght amber 

 below, dark amber above. 



Thorax closely pitted except on the scutellum, the metanotura, 

 and the enclosure, clothed with short silvery hairs, black except for 

 two elongate patches on the pronotum, two oval patches on the 

 scutellum, the metanotum, a patch on the pleura, and the tegulae, all 

 of which are light yellow; tegulae elevated and hghtly pitted; the 

 propodeum is reddish amber except for the enclosure, which is black ; 

 enclosure is smooth except for a mesal groove and lateral ridges, 

 which are set at about a 45° angle to the mesal groove; mesosternal 

 tubercles small and black; legs largely light amber except for yellow 



