426 PROCEEDINGS OF THE NATIONAL MUSEUM vol. ii« 



rohertsonii Fox but the clypeal processes and their lamellae easily 

 separate them. 



Distribution. — This species has been taken mostly in the Eastern 

 States from New York south to Georgia and west to Iowa. Even 

 though widely distributed in the East, collection records are relatively 

 few. The following specimens have been recorded by the writer: 



Alabama: 9, Kushla. District of Columbia: ?, Washington, June 22, 

 1951 (N. Banks). Georgia: ? , Tallulah Falls, June 19-25, 1909 (J. C. Bradley). 

 Illinois: 9, Danville, August 31, 1924 (A.S.B.); 9, Prophetstown, July 7, 1925 

 (T. H. Frison). Iowa: 9 , Ledges State Park, Boone Co., July 29, 1950 (Jean 

 LaFoon); 9, Lyon Co., July 7, 1936 (H. E. Jaques) ; 2 99, Lyon Co., July 7, 



1936 (D. Milspaugh). Louisiana: 9 , Claiborne Co., May 22, 1931. Maryland: 

 9, Baltimore, July 1914 (F. E. Blaisdell) ; 9, Baltimore, July 1909; 9, Thomas 

 Road, near Cumberland, June 28, 1953 (L. M. Walker). New jersey: 9, 

 Riverdale, July 24, 1909 (L. B. Woodruff). New york: 9, Bohemia, June 20, 



1937 (K. V. Krombein); 9, White Plains, June 29, 1918 (J. Bequaert). North 

 Carolina: 9 , Mars Hill, July 6, 1928 (J. B. Mitchell). Ohio: 9 , Hocking Co., 

 May 20 (D. J. and J. N. KnuU) ; 9 , S. Bloomingville, July 2, 1946 (U. N. Lanham). 

 Pennsylvania: 9, Glenside, July 5, 1909 (G. M. Greene); 9, Leighgap, July 1, 

 1897; 9, Pittsburg, June 15, 1911 (Hugo Kalil). Tennessee: 9, Tennessee 

 City. Virginia: 9, Dunn Loring, July 28, 1951 (K. V. Krombein) ; 3 9 9, 

 Falls Church, June 7, 27, July 6 (N. Banks). West Virginia: 9, Monongalia 

 Co., June. 



Prey record. — The only information available relative to the 

 prey collected by Cerceris mandibularis Patton is reported by Cart- 

 wright (1931, p. 269), who reports the wasps collecting a grasshopper 

 nymph. This recorded observation is open to question unless verified 

 by later reports. 



Plant record. — None. 



34a. Cerceris rohertsonii rohertsonii Fox 



Figures 44, 136a,b,c 



Cerceris rohertsonii Fox, 1893 p. 55. — Robertson, 1894a, p. 464; 1894b, p. 112. — 

 Ashmead, 1899, p. 296.— Smith, J. B., 1900, p. 519; 1910, p. 678.— Banks, 

 1912a, p. 17; 1912b, p. 107.— Viereck, 1916, p. 695.— Britton, 1920, p. 342.— 

 Krombein, 1949, p. 271; 1950, p. 148.— ScuUen, 1951, p. 1010.— Krombein, 

 1952c, pp. 288-295; 1952b, p. 95; 1953, pp. 119-121, 122, 123; 1954b, p. 235; 



1955, p. 234.— Linsley and MacSwain, 1956, pp. 77, 79.— Evans, 1957, p. 

 86, pi. 12.— Krombein, 1958a, p. 197.— Evans, 1959, pp. 156-7. 



Cerceris austrina Fox (female only), 12 1893, p. 556.— Dalla Torre, 1897, p. 453. — 

 Ashmead, 1899, p. 296.— Scullen, 1951, p. 1005.— Krombein, 1954b, p. 235; 



1956, p. 234 (new synonymy). 



Cerceris pleuralis H. S. Smith, 1908, p. 366.— Mickel, 1918, p. 452. 



Female. — Length 12 to 13 mm. Black with yellow markings; 

 punctation average; pubescence short. 



12 For a discussion of this species, see under C. f. floridensis Banks (p. 424). 



