WASP GENUS CERCERIS — SCULLEN 477 



on terga 3, 4, and 5; venter immaculate; pygidium with sides con- 

 verging to a round apical end. 



The color markings vary some in the shade of yellow and in their 

 extent. The clypeal process easily distinguishes this small eastern 

 species. 



Male. — Unknown. 



Type. — The type female of C. dentifrons Cresson, from Illinois, is 

 at the Philadelphia Academy of Natural Sciences, no. 1942.1. 



Distribution. — Scattered records thi'oughout the Northeastern 

 States, from South Dakota to New England, north of the Ohio River 

 and the Washington, D.C, area. 



Prey record. — None. 



Plant record. — Solidago rigida (North Dakota). 



55. Cerceris deserta Say 



Figures 80, 161a,b,c,d,e 



Cerceris deserta Say, 1825, p. 344. — Smith, F., 1856, p. 465. — Cresson, 1865, p. 

 125.— Packard, 1866, p. 63.— Cresson, 1876, pp. 206-211.— Provancher, 1882, 

 p. 76; 1883, p. 465.— LeConte, 1883, p. 232.— Taylor, 1884, p. 80.— Cresson, 

 1887, p. 282.— Schletterer, 1887, p. 489.— Provancher, 1889, p. 645.— Ash- 

 mead, 1890, p. 32.— Dalla Torre, 1897, p. 457.— Peckham, 1898, p. 115.— 

 Bridwell, 1898, p. 209.— Smith, J. B., 1900, p. 519.— Viereck, 1906, p. 397.— 

 Smith, H. S., 1908, p. 367.— Smith, J. B., 1910, p. 678.— Banks, 1912a, p. 

 18; 1912b, p. 107.— Viereck, 1916, p. 695.— Mickel, 1917b, p. 449.— Britton, 

 1920, p. 341.— Bischoff, 1927, p. 369.— Viereck, 1928, p. 196.— Scullen, 1942, 

 p. 187.— Strickland, 1947, pp. 121-130.— Scullen, 1951, p. 1007. 



Cerceris fulvipes Cresson, 1865, p. 126.— Packard, 1866, p. 63.— Patton, 1879, p. 

 360.— Cresson, 1887, p. 282.— Schletterer, 1887, p. 492 (fulvipediculata 

 nomen nudum).— Robertson, 1894, pp. 453, 455; 1896, p. 175.— Brid- 

 well, 1898, p. 209.— Ashmead, 1899, p. 295.— Smith, J. B., 1910, p. 678.— 

 Scullen, 1942, p. 187. 



Cerceris fulvipediculata Schletterer, 1887, p. 492.— Smith, H. S., 1908, p. 369.— 

 Banks, 1912a, p. 24.— Viereck, 1916, p. 695.— Stevens, 1917, p. 422.— Mickel, 

 1917b, p. 451.— Viereck, 1920, p. 342. 



Female. — Length 10 mm. Black with creamy-yellow to white 

 markings; punctation and pubescence average. 



Head slightly wider than the thorax; black except for two large 

 frontal eye patches, a bilobed patch on the clypeal elevation, large 

 patch back of the compound eye, and the basal half of the mandibles, 

 all of which are creamy white; clypeal border with five denticles, the 

 medial one with a medial depression above and the two lateral den- 

 ticles much smaller than the second pair; clypeal elevation reduced 

 to a characteristic bilobed, distended area; mandibles with three small 

 denticles, becoming progressively larger toward the apical one, 

 beyond which there is a carina; antennae fulvous below and fuscous 

 above, normal in form. 



742-463—65 10 



