476 



PROCEEDmGS OF THE NATIONAL MUSEUM 



Va., are at the Museum of Comparative Zoology, Harvard, no. 13784. 



Distribution. — Throughout the Eastern States, south to the Gulf 

 of Mexico and west to Minnesota, Iowa, and Kansas. 



Prey record. — None. 



Plant record. — Asclepias sp. (Ohio), Melilotus alba (Kansas). 



Figures 78, 79. — Localities of: 78, C. clypeata frominens Banks; 79, C deniifrons Cresson. 



54. Cerceris dentifrons Cresson 



FiGUEES 79, 160a,b,c 



Cerceris deniifrons Cresson, 1865, p. 124. — Packard, 1866, p. 63. — Cresson, 1887, 

 p. 282.— Schletterer, 1887, p. 489.— Dalla Torre, 1897, p. 457.— Ashmead, 

 1899, p. 295.— Smith, J. B., 1900, p. 519; 1910, p. 678.— Banks, 1912a, 

 p. 18.— Viereck, 1916, p. 696.— Stevens, 1917, p. 422.— Mickel, 1917b, 

 p. 448.— Johnson, 1927, p. 156.— Proctor, 1938, p. 439; 1946, p. 500.— 

 Scullen, 1951, p. 1007. 



Female. — Length 8 mm. Black with light yellow markings; punc- 

 tation close and deep; pubescence very short. 



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

 eye patches and the clypeal process, all of which are yellow; clypeal 

 margin slightly extended with denticle-like extensions at the lateral 

 apices; clypeal process lunate with the points very acute; mandibles 

 with two adjoining medial denticles; dark fuscous except for a yellow 

 area at the base; antennae normal in form, dark fuscous. 



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

 notum, small patches on the propodeum, and the tegulae, all of which 

 are light yellow; tegulae low and smooth; enclosure deeply ridged 

 longitudinally; mesosternal tubercles absent; legs fuscous to near the 

 apical ends of the femora, beyond which they become ferruginous with 

 darker patches on the midtibiae; wings subhyaline. 



Abdomen wdth a doubly indented band on tergum 1, a deeply 

 emarginate band on tergum 2, and narrow, slightly emarginate bands 



