BEETLE GENUS ONTHOPHAGUS — HOWDEN, CARTWRIGHT 63 



tionately shortened and somewhat thickened; both apical conical 

 projection and distmct pencil of hairs lacking. 



Allotype. — Female, length 5.9 mm., width 3.6 mm. Differing from 

 the holotype male major in the following respects: Clypcus slightly 

 reflexed anteriorly, broadly, somewhat angularly emarginate; clj^'peal 

 disc coarsely, riigosely punctate, the punctures often with brownish- 

 yellow setae; clypeal carina distinct but only slightly, rather evenly, 

 elevated above clypeal-frontal sm-face. Frons behind carina coarsely 

 punctate; frontal carina low but distinct, generally of uniform height, 

 vaguely indented medially, becoming gradually obsolete laterally; 

 gena scarcely flared, only very obtusely angulate near pronotal angle. 



Pronotum less convex, pronotal protuberance indicated by a vague 

 rounded swelling; punctm-es about the same sizes and density as on 

 the male majors. Elytra and pygidium generally similar to male 

 majors. Ventral sm-faces similar to male major except for shortened 

 stubby forelegs; the apex of forefemm* barely reachmg the lateral 

 pronotal margin; foretibia proportionately shortened; apical projec- 

 tion and pencil of hairs lacking; apical spine as long as the three basal 

 tarsal segments. Last abdominal segment not emarginate, approxi- 

 mately the same width throughout. 



Type. — Canadian National Collection 7529. 



Type locality. — Chipinque Mesa (5400 ft.) near Monterrey, 

 Nuevo Leon, Mexico. 



Specimens examined. — 67. 



Distribution. — (See fig. 8, p. 64.) Holotype, cf , and allotype, 9, 

 Chipinque Mesa (5400 ft.) near Monterrey, NeuvoLeon, Mexico, Aug. 

 26-29,1960, on cow dung, H. F. Howden. And the following paratypes: 



Mexico: nuevo le6n: 24 c? cT, 24? 9 , same data as type (cnc, usnm, How- 

 den). puebla: 7 cf cf , 8 9 9 , 6 mi. west of Teziutldn, Aug. 19, 1958, in human 

 dung, H. F. Howden (cnc, usnm). 



United States: texas: 1 cf, Boot Springs, Chisos Mts., Big Bend National 

 Pk., 7000 ft, May 18, 1959, in horse dung, H. Howden and E. Becker (cnc). 



Remarks. — As is usual in Onthophagus, size range in the species is 

 considerable. Males vary from 4.3 to 6.9 mm. in length and from 2.6 

 to 3.9 mm. in width. Females vary from 5.2 to 6.5 mm. in length and 

 from 3.2 to 4.0 mm. in width. Specimens are nearly always black, 

 but unworn or teneral specimens have a brownish cast. There is some 

 variation in the size, depth, and spacing of the pronotal punctures. 

 In some specimens the large setigerous punctures are relatively close, 

 being separated by a distance equal to 1 to 2 diameters; in others, from 

 the same locality, the punctures may be separated by a distance equal 

 to 4 to 5 diameters. The margin of the pronotal punctures is usually 

 distinctly depressed, but not infrequently the outer part of the punc- 

 ture is represented by a shining ring scarcely, if at all, depressed. 



