364 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iie 



the space between the antennae; mandibles with centrally located 

 elevations barely evident; antennae normal in form, dark amber 

 basally, becoming lighter on the flagellum. 



Thorax black except for two patches on the pronotmn, two small 

 patches on the scutellmn, the metanotmn, patches on the tegulae, a 

 small patch on the pleuron, all of which are creamy white; enclosure 

 deeply and sparsely rugose; mesosternal tubercle small and black; 

 legs black except for apical parts of fore- and midfemora aad patches 

 on all tibiae, which are creamy white to amber; wings are subhyaline, 

 becoming cloudy at the apex. 



Abdomen : tergum 1 with a broad triangular patch ; tergum 2 with 

 a broad band cm"ving away from the posterior border of the tergum on 

 each side of the center, giving the band a sinuate effect; terga 3 and 

 4 with narrower emarginate bands; tergum 5 with an elongate patch; 

 venter black, immaculate; pygidium oval but somewhat broader 

 basally. 



Male. — Unknown. Possibly it is being confused with the male 

 of C. acanthophila Cockerell, C. convergens Viereck and Cockerell, 

 or a closely related species. 



Very similar in general appearance to C. acanthophila Cockerell, 

 C. convergers Viereck and Cockerell, C. neahminax Scullen, and other 

 closely related species. The female of C. butleri Scullen may be 

 recognized by the distinct clypeal process, the sinuate band on the 

 second abdominal tergum, and the form of the pygidium as well as 

 other characters listed in the description. 



Types. — Type female, taken 30 miles south of Safford, Ariz., 

 Sept. 24, 195G, on a yellow composite (G. D. Butler), is at the U.S. 

 National Museum, no. 66155. Paratypes are as follows: 



Arizona: 9, Canelo, July 30, 1956 (G. D. Butler); ?, 6 mi. E. Douglas, 

 Cochise Co., Sept. 8, 1958, at Heplopappus hartwegi (P. D. Hurd) ; 9 , Graham 

 Mts., 3500-4500 ft., Aug. 18, 1954 (R. M. Bohart); 9, Portal, July 23-31, 1959 

 (K. V. Krombein) ; 9 , Portal, Chiricahua Mts., Aug. 3, 1956 (R. M. Bohart) ; 

 3 9 9, 2 mi. NE. Portal, July 30, Aug. 1, 3, 1959 (M. Statham); 9, 4 mi. SE. 

 Portal, July 28 1959 (M. Statham) ; 9 , Rosemont, Pima Co., Oct. 9, 1954, at 

 Baccharis sp. (F. G. Werner) ; 9 , San Carlos, Sept. 6, 1933 (Parker) ; 9 , Tanque 

 Verde, Sept. 12, 1954, at Aplopappus sp. (F. Werner); 9, Tucson, Oct. 19, 1939 

 (R. H. Crandall); 9 , Tucson, Nov. 1, 1940 (Bryant). Texas: 9 , Alpine, July 8, 

 1952 (H. A. ScuUen). 



Distribution. — Southern Arizona and the one record from Alpine, 

 Tex. 



Prey record. — None. 



Plant record. — As Hsted under paratypes. 



