468 PROCEEDINGS OF THE NATIONAL MUSEUM vol. lie 



52. Cerceris calochorti Rohwer 



Figures 74, 155a,b,c 

 Cerceris calochorti Rohwer, 1908, p. 322. — Scullen, 1951, p. 1006. 



Female. — Length 10 mm. Black with cream-colored markings; 

 punctation and pubescence average. 



Head slightly wider than the thorax; black except for the entire 

 face below the antennal scrobes, spot back of the eye, basal three- 

 fourths of the mandibles, and most of the scape, all of which are 

 cream colored; clypeal border with a broad extension on the medial 

 lobe with a sinuate margin; clypeal elevation depressed with the sides 

 converging to a truncate end, which is emarginate and subequal in 

 width to the length of the epistomal suture; mandibles with two dis- 

 tinct denticles, basad of which is a slight denticle-like elevation; 

 antennae light fulvous below and dark above, normal in form. 



Thorax black except for a divided band on the pronotum, a broad 

 band on the scutellum, the metanotum, a large patch on each side of 

 the propodeum, a small patch on the mesopleuron, and the tegulae, 

 all of which are cream colored ; tegulae low and smooth ; enclosure with 

 a slight but distinct medial groove and the surface entirely covered 

 with fine striae subparallel to the meson; mesosternal tubercle absent; 

 legs yellow except for most of the coxae, the trochanters, and the 

 apical end of the hindfemora, which are black; wings subhyaline, 

 slightly clouded apicaUy. 



Abdomen with a divided band on tergum 1, broad but deeply 

 emarginate bands on terga 2 to 5; venter sometimes immaculate 

 or with variable amounts of cream-colored markings on sternites 

 2 to 5; pygidium wedge shaped with the sides converging to a small 

 rounded apical end. 



Male. — Length 9 mm. Black with cream-colored markings; 

 punctation and pubescence about average. 



Head sUghtly wider than the thorax, black except for the entire 

 face below the antennal scrobes, small spot back of the eye, basal 

 three-fourths of the mandibles, and most of the scape, aU of which 

 are cream colored; clypeal border with three subequal small denticles; 

 clypeal surface slightly convex; hair lobes equal in length to the 

 width of the lateral lobes; mandibles with a low carina-like elevation; 

 antennae light fulvous below, darker above, normal in form. 



Thorax black except for two patches on the pronotum, an evanes- 

 cent band on the scuteUum, the metanotum, large patch on each 

 side of the propodeum, small spot on the mesopleuron, and the 

 tegulae, all of which are cream colored; tegulae low and smooth, 

 enclosure smooth except for a sUght but distinct medial groove; 

 mesosternal tubercle absent; legs cream colored except for dark 



