58 PEOCEEDINGS OF THE NATIONAL IMUSEUM vol. ii4 



and a conical apical tooth above the short inturned tibial spine, 

 femora of mesothoracic and metathoracic legs having on their ventral 

 surfaces scattered coarse setigerous punctures and a few very fine 

 punctures. 



Male minors. — Length 7 to 8 mm., width 4.3 to 4.6 mm., usually 

 smaller than male majors or females, differing from the former in the 

 following respects: Cl3^peus refiexed only slightly more anteriorly 

 than laterally, ch'peal carina pronounced, transverse carina of the 

 vertex complete, highest laterally, indicative of the conical tubercles 

 above the ej^es in male majors, the pronotal projection greatl3^ re- 

 duced, only slightly bifurcate, fore femur and tibia not greatly elon- 

 gate; tibia lacking the apical conical tooth over the elongate tibial 

 spine which resembles that of a female. 



Females. — Length 9 to 10 mm., width 5 to 5.5 mm. Differing 

 from the male major in the following respects: Clypeal margin rather 

 evenly arcuate, slightly emarginate, moderately refiexed anteriorly, 

 only slightly so laterally; sm-face very coarsely, rugosely punctured, 

 much more so than males; carinae of both clypeus and vertex pro- 

 nounced, that of vertex being more pronounced and highest medially; 

 vertex before the carina slightly more coarsely punctured than in male 

 and with scattered secondary punctures. Pronotum with the median 

 process evidenced by a broad hump, most pronounced at the lateral 

 angles, not extendmg beyond the anterior prothoracic margin. Elytra 

 and pygidium similar to those of male. Prothoracic legs not elon- 

 gate, the apical end of the femur not extending as far as the lateral 

 margin of the thorax; tibia laterally with four large teeth, proportion- 

 ately shortened and lacking the apical conical tooth; tibial spine long 

 and cm-ved inward at the tip. Mesothoracic and metathoracic femora 

 slightly thicker and shorter than in male majors. 



Type. — Canadian National Collection 247L 



Type locality. — 101 Ranch, Noble Co., Okla. 



Specimens examined. — 38. 



Distribution. — (See fig. 7, p. 59.) 



Oklahoma: Noble Co., Stillwater, Grady Co., Cleveland, new Mexico: 

 Cloudcroft, Roswell. 



Remarks. — This species can be distinguished from orpheus, pseu- 

 dorpheus, and other allied species of Onthophagus by its large size, pic- 

 eous color, coarse setigerous punctm-es of the pronotimi with definite 

 tubercles at their anterior margins, presence of secondary pronotal 

 punctures, elytral intervals (except for sutural ones) irregularly bise- 

 rially tuberculate, and the quite distinctive secondary sexual charac- 

 teristics of male majors. 



0. cynomysi exhibits not only less morphological variability than 

 does orpheus or pseudorpheus, but it is also quite restricted in its habitat 



