297 

 Female genitalia with spermathecal head kidney-shaped, 



with top-knot; tail weakly swollen, angled and curved onto 



itself (Fig. 141e) (1 dissected) . 



Presence of stridulatory files on occipital region of 

 head unknown (heads retracted) . Male prosternum smooth and 

 without punctation. Female prosternum roughened-wrinkled; 

 if punctures present, weakly impressed and obscure 

 (difference possibly due to individual variation) . 



Variation . The only notable variation between the 2 

 specimens studied is the size of the orange mark on the 

 f rons . In the male specimen from "Sierra de Durango", 

 Mexico, the orange spot occupies over half the face. The 

 female from the state of San Luis Potosi, Mexico, has the 

 spot smaller, covering less than a quarter of the face. 



Specimens examined . Only 2 specimens were studied, 

 representing 2 collection records. Label data: Mexico, San 

 Luis Potosi, 6.9 mi. W. El Naranjo, Rte. 80, 14-X-1965, G. 

 E. Ball & D. R. Whitehead [1, CUIC] ; Sierra de Durango, Fry 

 Coll. 1905-100 [1, NHML] . 



Distribution . Known only from the state of San Luis 

 Potosi and "Sierra de Durango", Mexico (Fig. 146). In the 

 gazetteer to the Biologia Centrali-Americana, Selander and 

 Vaurie (1962:57) stated that the locality "Sierra de 

 Durango" is part of the Sierra Madre Occidental and noted 

 that "according to Champion (Coleoptera, vol.4, pt.4, 

 p. 210), specimens with this label obtained from Donckier are 



