470 PROCEEDINGS OF THE NATIONAL MUSEUM vol. ue 



Cerceris imitatoria Schletterer, 1887, p. 494.— Smith, H. S., 1908, p. 367.— Banks, 

 1912a, p. 20; 1912b, p. 107.— Mickel, 1917b, pp. 446, 449.— Britton, 1920, 

 p. 342.— Scullen, 1951, p. 1008. 



Cerceris chryssipe Banks, 1912, p. 18. — Stevens, 1917, p. 421. — Scullen, 1951, 

 p. 1006. 



Cerceris clymene Banks, 1912a, p. 20; 1912b, p. 107.— Scullen, 1951, p. 1006. 



Cerceris zobeide Brimley, 1929, p. 194.— Scullen, 1951, p. 1011; 1960, p. 77. 



Cerceris zosma Brimley, 1929, p. 195.— ScuUen 1951, p. 1011; 1960, p. 77. 



Female.' — Length 12 to 14 mm. Black with yellow markings; 

 punctation and pubescence average. 



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

 eye patches, the surface of the clypeal process, base of mandibles, 

 patch on the scape, and a small spot back of the compound eyes, all 

 of which are yeUow; clypeal border with two broad and low denticles 

 with a depression between them; clypeal process inverted scoop 

 shaped, with the sides subparallel or slightly converging apically; 

 mandibles with three low denticles, the apical one being more isolated 

 and somewhat larger; antennae normal in form. 



Thorax black except for two patches on the pronotum, the metano- 

 tum, and the tegulae, aU of which are yellow; tegulae low and smooth; 

 enclosure deeply ridged subparallel to the meson; mesosternal tubercles 

 absent; legs fuscous to black basally to near the middle of the femora, 

 beyond which they are yellow infused with brown; wings subhyaline 

 but clouded. 



Abdomen black except for a broad band slightly emarginate on 

 tergum 2 and narrow broken lines on the posterior margins of terga 

 3, 4, and 5; venter immaculate; pygidium with sides slightly converging 

 to an apical rounded end. 



Male. — Length 10 to 12 mm. Black with yellow markings; 

 punctation and pubescence average. 



Head slightly wider than the thorax, black except the face, base of 

 mandibles, and the scape, all of which are yellow; clypeal border with 

 three subequal denticles on the medial lobe; surface of the clypeus 

 convex; hair lobes limited to the lateral lobes of the clypeus; mandibles 

 with the inner margin slightly sinuate without distinct denticles; 

 antennae with the terminal segment slightly curved. 



Thorax black except for two patches on the pronotum, the metano- 

 tum, and the tegulae, aU of which are yellow; tegulae low and smooth; 

 enclosure deeply ridged parallel to the meson; mesosternal tubercles 

 absent; forelegs dark to the femora, beyond which they are mostly 

 yellow; midlegs largely yellow with darker areas; hindlegs largely 

 yellow to middle of the femora, beyond which they are largely dark; 

 wings subhyaline but sUghtly clouded. 



Abdomen black except for a broad band on tergum 2 and narrow 

 broken lines on terga 3 to 6; venter black to dark fuscous with small 



