458 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iia 



ern States, from Wisconsin and Illinois east to New England and 

 south to North Carolina. Specimens are as follows: 



Illinois: 4 9 9, Carlinville, 1901, (Robertson); 9, Muncie, Sept. 21, 1930. 

 Iowa: 9, Lodges State Park, Boone, Aug. 22, 1934 (ScuUen). Massachusetts: 

 9 , Millon, Aug. 14, 1898 (P. G. Bolster) ; 9 , Natick, Sept. 1, 1934 (C. A. Frost) ; 

 9, WoUaston, June 1, 1895 (F. H. Sprague). Michigan: 9, Lake Co., 1947 

 (R. R. Dreisbach). New Hampshire: 9, Pelham, Aug. 29, 1905 (Bridwell) ; 

 69 9, Pelham, Sept. 5, 1905. New York: 9, Montauk, Long Island, Sept. 4, 

 1953 (Roy Latham); 9, Northwest, Long Island, June 3, 1947 (Roy Latham); 

 29 9, Powder Mills, Aug. 24, 1955 (K. V. Krombein). North Carolina: cf, 

 Black Mts., Mount Mitchell, 5000-6711 ft., Sept. 6, 1930 (N. Banks); 9 , VaUey 

 of Black Mts., Sept. 11, 1906 (W. Beutenmuller). Virginia: 9, Brushy Mts., 

 Rockbridge, Sept. 17, 1934 (L. K. Gloyd); 9, 2(f cf, Dunn Loring, Aug. 28, 

 1948, Aug. 21, 1949 (K. V. Krombein); 29 9, Falls Church, Sept. 1 (N. Banks). 

 West Virginia: 9, Cheat Mt., Aug. 23. Wisconsin: 9, Maiden Rock, Aug. 

 4-10, 1910. 



Prey record. — None. 

 Plant record. — None. 



47. Cerceris atramontensis Banks 



Figures 68, 150a,b,c 



Cerceris atramontensis Banks, 1913b, p. 425, pi. 1, fig. 8. — ScuUen, 1951, p. 1005. — 



Krombein, 1956, p. 43; 1958a, p. 197. 

 Cerceris arbuscula Mickel, 1916, p. 410; 1917b, p. 450.— Scullen, 1951, p. 1005. 



Female. — Length 13 mm. Black with yellow markings; pmicta- 

 tion and pubescence average. 



Head slightly wider than the thorax; black except for medium- 

 sized frontal eye patches and patch on the clypeal process, which are 

 yellow; clypeal border with two widely separated, large, blunt den- 

 ticles; clypeal process with the width and length subequal, sides 

 sUghtly converging and ending in denticle-like lateral extensions and 

 the apical margin concave between the lateral extensions; mandibles 

 with two denticles, the apical one the larger; antennae normal in 

 form, dark fuscous. 



Thorax black except for two elongate patches on the pronotum and 

 the metanotiun, which are yellow; tegulae low, smooth, and fulvous 

 with a trace of yellow; enclosure deeply ridged longitudinally with 

 the ridges spreading slightly apically; mesosternal tubercle absent; 

 legs fuliginous basally over most of each femora, becoming fulvous 

 on the tibiae and tarsi; wings subhyaline but clouded. 



Abdomen black with two lateral patches on tergum 1; tergum 2 

 with a broad but deeply emarginate band on the posterior half; 

 narrow lines on terga 3, 4, and 5; venter immaculate; pygidium with 

 sides slightly convex and narrowing to a rounded apical end. 



Male. — So far indistinguishable from other closely related species. 

 It is probably being confused with the male of C. clypeata Dahlbom. 



