WASP GENUS CERCERIS — SCULLEN 411 



Robertson, 1892, p. 105.— Ashmead, 1894, p. 60.— Robertson, 1896, p. 

 73.— Dalla Torre, 1897, p. 462.— Bridwell, 1898, p. 209.— Ashmead, 1899, 

 p. 295.— Peckham, 1900, p. 90.— Smith, J. B., 1900, p. 519.— Viereck, 1903, 

 p. 120.— Hartman, 1905, p. 66.— Smith, H. S., 1908, p. 366.— Smith, J. B., 

 1910, p. 678.— Grossbeck, 1912, pp. 135, 299.— Banks, 1912a, p. 17.— 

 Viereck, 1916, pp. 695, 696.— Mickel, 1917b, p. 447.— Britton, 1920, p. 

 342.— Rau, 1922, pp. 30-31; 1928, p. 338.— Cartwright, 1931, pp. 269-270.— 

 Scullen, 1951, p. 1008.— Krombein, 1952b, p. 95.— Linsley and MacSwain, 

 1956, p. 74.— Evans, 1957, pp. 84-85, pi. 11.— Krombein, 1958b, pp. 101, 

 110.— Evans, 1959, p. 156. 



Cerceris cincta Dahlbom, 1845, p. 204.— Smith, F., 1856, p. 438.— Cresson, 1887, 

 p. 282. 



Cerceris unicincta Taschenberg, 1875, p. 397.— Patton, 1880, p. 403.— Cresson, 

 1887, p. 282.— Schletterer, 1887, p. 505.— Dalla Torre, 1897, p. 462.— Ash- 

 mead, 1899, p. 295. 



Female. — Length 15 mm. Black with very hmited creamy-yellow 

 markings; deeply and closely pitted; clothed with short silvery hairs. 



Head subequal in width to thorax; black except for large patches 

 mesad of the compound eyes, a patch on the medial lobe of the 

 clypeus, and base of mandibles, all of which are light yellow; clypeal 

 border with two widely separated denticles, between which is a 

 broad extension emarginate in the center; clypeal surface denticles 

 inconspicuous ; mandibles with two distinct, medially located denticles, 

 the basal one much the larger; antennae normal in form, black. 



Thorax black except for two patches on the pronotum and the 

 metanotum, which are creamy yellow; tegulae smooth except for a 

 few scattered pits, not elevated; enclosure covered with minute pits, 

 a few scattered lateral large pits, and a central groove ; mesosternal 

 tubercles absent; legs black except for elongate blotchy patches on 

 all tibiae; wings clouded. 



Abdomen black except for a broad band on tergite 2 and small 

 lateral patches on tergite 3, which are creamy yellow, more or less 

 blotched with black; venter black, immaculate; pygidium somewhat 

 pyriform with the surface rugose. 



Male. — Length 10-12 mm. Black with creamy-yellow markings; 

 normally pitted and clothed with short silvery hairs. 



Head shghtly wider than the thorax, black except for large eye 

 patches on the face; clypeal border sMghtly extended, with a straight 

 margin except for a slight medial denticle ; mandibles without distinct 

 denticles; antennae black, normal in form. 



Thorax black except for a broken band on the prothorax and 

 the metanotum, which are creamy yellow; tegulae lightly pitted and 

 not elevated; enclosure with many minute pits and a few large pits; 

 mesosternal tubercle absent; legs black except for creamy-yellow areas 

 on all tibiae; wings clouded. 



