BEETLE GENUS ONTHOPHAGUS — HOWDEN, CARTWRIGHT 21 



0. retusus Harold is also much less closely and evenly punctate, 

 with punctures smaller and with elytral tubercles and striae finer. 



0. cyanellus Bates has pronotal punctures very noticeably of two 

 sizes, not uniform as in cochisus, and with very much finer tubercles; 

 it is deep blue rather than black. 



Onthophagus batesi, new species 



Plate 2, Figures 6 and 7 

 Onthophagus incensiis (Say), Howden, 1955, p. 264. 



HoLOTYPE. — Male major, length 8 mm., width 5 mm. Shining, black, 

 with legs and marginal areas of head and pronotum reddish brown. 

 Anterior margin of cl3^peus abruptly, strongly reflexed; the apex 

 moderately, widely emarginate-truncate; lateral margins not reflexed. 

 Head wider than long, flat, without clypeal carina; genae weak, widely 

 rounded; the eyes convex, 11 facets wide, two-fifths as wide as long; 

 vertex with two long, widely separated, very slightly diverging ver- 

 tical horns; the horns nearly straight, weakly flattened transversely, 

 mth a very distinct U-shaped carina extending down one horn, 

 across the front, and up the other; punctures of head fine, quite 

 evenly distributed in front of carina, separated generally by 2 to 3 

 diameters, smooth behind carina except at extreme occiput. 



Pronotum finely, completely margined; anterior angles moderately, 

 sharply rounded but not acute, posterior angles broadly rounded; 

 median protuberance high, slightly bulbous, nearly vertical, grad- 

 ually rounding into the relatively shallow, vertical cavity on each 

 side which receives the cephalic horn; surface very finely punctate 

 laterally and medianly over protuberance; lateral cavities, disc, and 

 basal areas very minutely punctate, almost impunctate. Elytra shin- 

 ing; striae fine; strial punctures scarcely crenating the intervals which 

 are almost flat, all very finely, quite closely and confusedly punc- 

 tate, the punctures separated by 3 to 4 diameters. Pygidium nearly 

 flat, alutaceous except at apex; moderately, coarsely punctate each 

 side of a slightly elevated impunctate median line; the punctures 

 separated by 1 to 2 diameters, those in the basal angles and adjacent 

 lateral areas bearing setae about as long as distance between punc- 

 tures; setae decumbent and pointing inward and downward toward 

 apex; marginal bead extending upward at apex to a short toothlike 

 process (not evident in other specimens). Legs reddish brown, ante- 

 rior tibia ending in a blunt, slightly up-turned tooth above the apical 

 spur. Club of antennae fuscorufous. 



Male minors.— Length 6 to 9.5 mm., width 4 to 5 mm. Male 

 minors tend to resemble the female in elevation of clypeal apex, 

 length of cephalic horns, pronotal protuberance, and lateral cavities; 



