BEETLE GENUS ONTHOPHAGUS — HOWDEN, CARTWRIGHT 19 



legs moderately elongate; foretibia slender and bent in the apical 

 third, tibial margin serrate above and between the four teeth. Femora 

 with ventral surface having a mixture of scattered large and minute 

 punctures, the coarse punctures usually bearing long setae. 



Male minors. — Length 6.1 to 7, mm., width 3.4 to 4 mm. Dif- 

 fering from the male majors in the following characteristics: Clypeus 

 rounded, not flared laterally, reflexed and slightly truncate anteriorly; 

 disc flat, coarsely, evenly, rugosely punctate, posterior clypeal carina 

 obsolete; frons coarsely punctate to shallowly, moderately punctate, 

 laterally and posteriorly alutaceous; carma of vertex evenly bowed, 

 highest mediall}^ the sharp lateral portions of the carina near the eyes 

 greatly reduced; gena with sides broadly rounded, extending slightly 

 beyond the margins of the clypeus. Pronotum evenly convex, coarsely 

 punctate, less so near the anterior angles; sm^face alutaceous between 

 the punctures, an occasional small anterior smooth area being the 

 only indication of the median tumosity of the male major; lateral 

 pronotal margin only slightly bent in anterior thu-d, not at all angulate. 

 Elytra not significantly different. Pygidium of male minor quite 

 convex, but otherwise similar to male major. Ventral surface similar 

 except for the foretibia, which is slightly bent in the apical half and 

 is shortened and thickened, but to a lesser degree than in the female. 



Females. — Length 8.5 to 9.5 mm., width 4.8 to 5.1 mm. Differing 

 from the male majors in the following respects: Clypeus longer and 

 narrower, anteriorly reflexed, truncate or slightly emarginate, sides 

 laterally obliquely arcuate; disc flat, rugosely pmictate, posteriorly 

 delimited by a low arcuate carina which is highest medially; frons very 

 coarsely, almost rugosely punctate; carina of vertex pronounced me- 

 dially, obsolete near the eyes, in some specimens thickened or mdented 

 at the median line; vertex behind the carina with scattered coarse 

 punctures, surface finely alutaceous. Pronotum similar to that of 

 male minor; the median tumosity slightly more pronounced, as is 

 the angulation in the anterior third of the pronotal margin. Elytra 

 similar except that the tubercles on the intervals are more pronounced. 

 Pygidium similar. Ventral surface showing the major difference 

 in the foretibia, which is straight, short, and thickened in width, 

 and in the last abdominal segment, which is not emarginate medially. 



Type. — Academy of Natural Sciences of Philadelphia. 



Type locality. — Pinery Canyon, Chiricahua Mts., Cochise Co., 

 Arizona. 



Specimens examined. — 346. 



Distribution. — (See fig. 2, p. 20.) 



United States: Arizona: Pinery Canyon (7000 ft.), Onion Saddle (7000 ft.), 

 Rustler Park (8400 ft.), Southwestern Research Station (5 mi. west of Portal), 

 and Cave Creek Canyon (5400 ft.), all in the Chiricahua Mts. 



Mexico: chihuahua: Guerrero. 



