WASP GENUS CERCERIS — SCULLEN 367 



This species is known only from the type, which is in poor condition. 

 It closely resembles the males of C. rujinoda Cresson and C. echo 

 Mickel, which, so far, are indistinguishable from each other. It may 

 prove to be a synonym of one of these species when better characters 

 are found for separating these closely related males. The writer is 

 retaining it as a valid species for the present. (See discussion under 

 C. rujinoda rujinoda Cresson, p. 394.) 



Type. — The type male of C. cleomae Kohwer, from Denver, Colo., 

 July 20, 1907, on cleome (Denning), is at the U.S. National Museum, 

 no. 25483. 



10. Cerceris cockerelli Viereck 



Figure 10 

 Cerceris cockerelli Viereck, 1902, p. 731. — Banks, 1947, p.31. — Scullen, 1951, p. 1006. 



Male. — Length 7.5 mm. Black with creamy-white markings; 

 tegulae smooth and not elevated. It is close to C. acanthophila 

 Cockerell and C. cleomae Rohwer in color and size. The species is 

 known only from the two cotype males. It may prove to be the same 

 as some closely related form. Until more positive characters are 

 found to separate the males of these closely related species, it will be 

 retained as a valid species. 



Type. — The cotype males of C. cockerelli Viereck, from La JoUa, 

 Calif., August 1901 (T.D.A. Cockerell), are at the Philadelphia 

 Academy of Natural Sciences, no. 10037. 



11. Cerceris conifrons Mickel 



Figures 11, 114a,b,c 



Cerceris conifrons Mickel, 1916, p. 410. — Mickel, 1917b, p. 450. — Banks, 1947, 



p. 31.— Scullen, 1951, p. 1006. 

 Cerceris rujinoda crucis H. S. Smith, 1908, p. 370 (in part). — Scullen, 1951, p. 1010. 



Female. — Length 8 to 9 mm. Black with creamy-white and yellow 

 markings except anterior parts of abdomen and the propodeum, 

 exclusive of the enclosure, which are reddish amber; closely and deeply 

 pitted; clothed with very short silvery hairs. 



Head one-fifth wider than the thorax; black except for the frontal 

 eye patches, the medial clypeal lobe, patches on the lateral clypeal 

 lobes, small patch on the lower frons, two round spots back of the 

 compound eyes, the basal half of the mandibles, and the scape, all of 

 which are creamy white; clypeal border with three processes, the 

 medial one broad and somewhat rounded, the two lateral ones that 

 are just laterad of the two curved surface denticles are smaller and 

 more pointed; clypeus with a centrally located, low, cone-shaped 

 elevation, below which are two black, prominent, curved denticles 

 close to the clypeal border; mandibles with two centrally located 



