480 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iie 



setts, North Dakota, New Hampshire, New York), Solidago canadensis 

 (Minnesota), Solidago rigida (Minnesota, North Dakota), yarrow 

 (New York). 



56a. Cerceris frontata frontata Say 



Figures 81, 162a, b,c, 183a,b; Plate 1 



Cerceris frontata Say, 1823, p. 80.— LeConte, 1883, p. 167.— Cresson, 1865, 

 p. 129.— Packard, 1866, p. 64.— Cresson, 1875, p. 717; 1887, p. 282.— 

 Schletterer, 1887, p. 492.— Dalla Torre, 1897, p. 461.— Ashmead, 1899, p. 

 295.— Viereck and Cockerell, 1904, p. 130.— Banks, 1912a, p. 16.— Mickel, 

 1917b, p. 447.— Banks, 1947, p. 9.— Scullen, 1951, p. 1008; 1961, pp. 46-47. 



Cerceris texensis Saussure, 1867, p. 89. — Schletterer, 1887, p. 504. — Dalla Torre, 

 1897, p. 478.— Scullen, 1951, p. 1010. 



Cerceris occidentalis Saussure, 1867, p. 100. — Schletterer, 1887, p. 498. — Dalla 

 Torre, 1897, p. 469.— Scullen, 1951, p. 1009. 



Female. — Length 25 mm. Ferruginous with dull yellow mark- 

 ings; punctation and pubescence normal. 



Head somewhat wider than the thorax; largely dull yellow with a 

 ferruginous area extendmg through the ocellar area between the 

 compound eyes, a ferruginous line connecting the vertex of the eyes 

 with a like-colored area on the occiput; clypeal border with two sepa- 

 rated, prominent, blunt denticles; laterad of each a much smaller 

 denticle; above each of the larger denticles a cluster of prominent 

 bristles, laterad of which is a row of shorter bristles decreasing in 

 length toward and extending to the mandibles; clypeal process 

 Imiar shaped but with considerable variations in the angle of expansion 

 in different specimens; a prominent row of closely packed bristles 

 extends along the concave margm of the process between the two 

 points; mandibles dull yellow at the base, becoming dark fuscous 

 toward the tip with two widely separated small denticles; antennae 

 normal in form with the scape dull yellow and the flagellum becoming 

 dark fuscous apically. 



Thorax ferruginous except for a semidivided band on the pro- 

 notum, the scutellum, the metanotum, most of the propodeum, 

 divided patch on the enclosure, elevated areas on the pleuron, and the 

 tegulae, all of which are dull yellow infused with ferruginous; tegulae 

 low and smooth; enclosure relatively smooth except for a shght medial 

 groove; mesosternal tubercles absent; legs largely dull yellow infused 

 with ferruginous; wings slightly clouded with ferruginous. 



Abdomen largely dull yellow on the terga with more or less ferru- 

 ginous along the anterior margins of each tergum; venter ferru- 

 ginous with the elevated areas somewhat lighter; pygidium with the 

 sides slightly convex, the basal end much narrower than the truncate 

 apical end, fringed with a row of bristles. 



Male. — Length 19 mm. Dark fuscous, ferrugmous, and yellow; 

 closely punctate; pubescence somewhat longer than average. 



