REVISION OF GENTJS EUCERCERIS CRESSON 



53 



The holotype female of E. bitruncata ScuUen is at the U.S. National 

 Museum, no. 50835 and was taken at San Antonio, Tex., June 9, 1917 

 (J. C. Crawford). The holotype male of E. triciliata Scullen, is at 

 the Cahfornia Academy of Sciences and was taken 20 mi. N. of El 

 Paso, Tex., June 19, 1942 (H. A. Scullen). 



Distribution. — Abundant throughout southern Arizona, southern 

 New Mexico and western Texas, with scattered records in north 

 central Mexico, south central Texas, southern California, southern 

 Nevada, and southern Utah. 



Prey record. — Minyomerus languidus Horn (Krombein in Arizona, 

 1960a, b). 



Figure 32. Southwestern U.S. and 

 northern Mexico. E. pimarum Rohwer 



Plant record. — Acacia sp. (Arizona, Texas). Baccharis glutinosa 

 (Arizona, Texas). Baileya pleniradiata (New Mexico). Bahia absinthi- 

 Jolia (Arizona). ChrysotJiamnus sp. (Cahfornia). Cuscuta indecora 

 (Texas). C. umbellata (Arizona). Eriogonum annum (Texas). E. 

 rotundifolium (New Mexico). E. thomasii (Arizona). E. trichopes (New 

 Mexico). E. wrightii (New Mexico). Euphorbia sp. (New Mexico). 

 Gaillardia amblyodon (Texas). 6. pulchella (New Mexico). Gutierrezia 

 microcephala (New Mexico). Haplopappus {Aplopappus) hartwegi 

 (Arizona). Hymenothrix wislizeni (New Mexico). Koeberlinia spinosa 

 (New Mexico). Lepidium sp. (New Mexico). L. alyssoides (Mexico). 

 Parthenium incanum (Arizona). Pedis papposa (California, New 

 Mexico). Thelespermia megapotamicum (Arizona). Tidestromia lanu- 

 ginosa (Texas). Verbesina encelioides (Arizona). 



27a. Eucerceris punctifrons cavagnaroi, new subspecies 



Figure 33 



Female. — Length 15 mm. Black with yellow markings; punctation 

 small and crowded; pubescence short. 



