WASP GENUS CERCERIS — SCULLEN 463 



Cerceris dufourii Guerin, 1845, p. 443. — Smith, F., 1856, p. 466. — Cresson, 1865, 

 p. 131.— Packard, 1866, p. 64.— Cresson, 1875, p. 717; 1887, p. 282.— 

 Schletterer, 1887, p. 490.— Dalla Torre, 1897, p. 457.— Ashmead, 1899, 

 p. 295.— Smith, J. B., 1900, p. 519; 1910, p. 678.— Scullen, 1942, p. 188.— 

 Guiglia, 1948, p. 179.— Scullen, 1951, p. 1005. 



Cerceris venator Cresson, 1865, p. 116. — Packard, 1866, p. 61. — Cresson, 1872, 

 p. 228; 1875, p. 717 { = bicornuta Guerin); 1887, p. 282.— Schletterer, 1887, 

 p. 505.— Ashmead, 1894, p. 60.— Dalla Torre, 1897, p. 480.— Bridwell, 

 1898, p. 209.— Ashmead, 1899, p. 295.— Smith, J. B., 1900, p. 519.— Cockerell, 

 1901, p. 42.— Viereck and Cockerell, 1904, p. 130.— Viereck, 1906b, p. 223.— 

 Smith, H. S., 1908, p. 364.— Smith, J. B., 1910, p. 678.— Mickel, 1917b 

 p. 447.— Hendrickson, 1930, p. 160.— Scullen, 1942, p. 188; 1951, p. 1005 



Cerceris curvicornis Cameron, 1890, p. 124. — Ashmead, 1899, p. 296. 



Cerceris bicornis [sic] Ashmead, 1899, p. 295. 



Cerceris serripes^^ Bequaert, 1928, p. 62. — Scullen, 1942, p. 188. — Strandtmann, 

 1945, p. 311. 



Cerceris bicornuta bicornuta Krombein, 1952c, p. 336; 1953, pp. 118-119, 123, 124, 

 125, 134; 1954b, p. 235; 1958, p. 197; 1958b, p. 101.— ScuUen, 1961, p. 45. 



Female. — ^Length 20 mm. Black, fuscous, ferruginous, and yellow 

 infused with brown; punctation and pubescence average. 



Head subequal in width to thorax; largely ferruginous with lighter, 

 irregular frontal eye patches and black ocellar area; clypeal border 

 with two low, broad denticles opposite the two lateral apices of the 

 clypeal process; clypeal process low and lunar-shaped; mandibles with 

 a medial ridge showing three indistinct, low denticle-like elevations; 

 antennae ferruginous basally, becoming fuscous apically, normal in 

 form. 



Thorax black except the pronotum, limited patch on the scutum, 

 the scuteUum, the propodeum, and the tegulae, all of which are dark 

 ferruginous, and the metanotum, which is yellow infused with brown; 

 tegulae low and smooth; enclosure black and smooth except for a 

 medial groove and pitted areas in the lateral angles; mesosternal 

 tubercles absent; legs largely ferruginous; wings fuscous. 



Abdomen dark ferruginous to fuscous except for large lateral yellow 

 patches on terga 1 and 2; venter fuscous with the more anterior 

 sternites somewhat lighter; denticle-like elevations appear on the 

 posteriolateral angles of sternite 5; pj^gidium broader medially, the 

 basal end a rounded point and the apical end broadly truncate. 



Male. — Length 17 mm. Black with yellow and ferruginous mark- 

 ings; punctation and pubescence average. 



Head subequal in width to thorax; black except for face, which is 

 yellow; clypeal border with a medial extension with three small 

 denticles; hair lobes narrow; clypeal surface slightly convex; mandibles 

 smooth except for a very slight indication of a single denticle; an- 



" See C. serripes Fabricius (pp. 503-505) for a discussion of its misidentification 

 as C. bicornuta Guerin. 



