434 PROCEEDINGS OF THE NATIONAL MUSEUM vol. lie 



lobe sinuate but without distinct denticles; clypeal process low and 

 with the free margin equal to about one-third of the distance between 

 the eyes; the clypeal lamellae not divided but slightly emarginate on 

 the free margin and bent to about a 45° angle from the plane of the 

 process surface; mandibles with three denticles, the more apical one 

 very large, the medial one very small, and basal ones medium in size ; 

 antennae normal in form. 



Thorax black except for a broad band on the pronotum, the scutel- 

 lum, a narrow patch on the metanotum, a large comma-shaped 

 area on the propodeum, and the tegulae, all of which are yellow; 

 tegulae smooth and not elevated; enclosure smooth except for minute 

 punctation and marginal deep pits; legs largely Ught amber, be- 

 coming yellow on the more apical parts of the first and second pair; 

 wings subhyaline. 



Abdomen largely yellow; first and second terga with the anterior 

 one-third amber and posterior two-thirds yellow; terga 3, 4, and 5 

 with broad yellow bands sUghtly emarginate, with black anteriorly; 

 tergum 6 very dark amber; venter amber except for lateral yellow 

 patches on sternites 3 and 4; pygidium oval, narrowing apically. 



Male. — Unknown. 



This species is very close to C. robertsonii Fox, but they can be 

 separated easily by the form of the clypeal process. 



Type. — The type female of C. squamulijera Mickel from Imperial, 

 Nebr., is at the University of Nebraska. 



Distribution. — Through the Western-Central States, from Ne- 

 braska south through Kansas, Arkansas, Oklahoma, and into Texas. 

 Specimens are as follows: 



Arkansas: 9, Arkansas River, June 8, 1956 (H. E. Evans, E. G. Matthews)- 

 Kansas: 3 9 9, Hamilton Co. (F. H. Snow); 9, Meade Co., August 14, 1945 

 (R. H. Beamer); 29 9, Medora, July 7, 1953 (Evans, Lin and Vashimoto); 9, 

 Morton Co., (F. H. Snow); 9, Seward Co., August 16, 1911 (F. X. Williams); 

 9, Stafford Co., June 30, 1934 (R. H. Painter). Nebraska: 39 9, Wallace 

 Co., July 7, 1931, July 2, 3, 1933 (R. Roberts). North Carolina: 9, Southern 

 Pines, June 13, 1918. Oklahoma: 9 , Alfalfa Co., August 8, 1932 (C. C. Dennier). 

 Texas: 9, Clarendon Co., August 11, 1905 (Hunter); 9, Cypress Mills; 9, 

 Galveston, Galveston Co.; 9, Galveston, May (F. H. Snow); 9, Galveston, 

 June 24, 1924 (Trotter); 3 9 9, Galveston, June 1900. 



Prey record. — None. 

 Plant record. — None. 



Group IV 



This group is distinguished by the following characters: (1) The 

 females have a prominent cone-shaped process on the medial clypeal 

 lobe, which is flanked on each side by a much smaller process attached 

 to the lateral clypeal lobe. (2) The males have the medial denticle 



