BEETLE GENUS ONTHOPHAGUS — ^HOWDEN, CARTWRIGHT 117 



and laterally; dorsal surfaces with pronounced oblong tubercles, 

 usually separated by a distance no greater than their greatest length; 

 behind each tubercle a minute, setigerous puncture; the long, yellowish 

 setae most pronounced laterally and anteriorly, becoming shorter and 

 less obvious medially and posteriorly, almost lacking near the posterior 

 median depression of the pronotal disc. Summits of the tubercles 

 shining, the surface between opaque, finely alutaceous; occasionally a 

 few scattered minute tubercles near the midline; anteriorly on the 

 pronotal process the tubercles irregular, being replaced by punctures 

 at the tip of the process. Elytral striae usually shining, shallowly 

 punctate; elytral intervals, except the sutural, very irregularly tri- 

 seriately tuberculate; basally each tubercle with a fine, yellowish seta 

 of approximately the same length as those of the thoracic disc; surface 

 between the tubercles finely alutaceous. 



Pygidium finely alutaceous over dorsal half, shining and coarsely 

 punctate over lower half. Ventral surfaces of thorax behind the 

 transverse carina shallowly punctate to coxal cavities, the surface 

 between punctures shining and finely ridged. Metasternum medially 

 with a smooth, shining, faint, longitudinal ridge, devoid of punctures 

 and highest anteriorly, laterally setigerously punctate and very finely 

 alutaceous. Each abdominal segment anteriorly with a transverse 

 row of coarse puntures which become more numerous laterally, surface 

 between punctures very finely alutaceous. Legs brownish black; 

 foreleg with femur and tibia longer than in female, the distal end of 

 the femur extending to the lateral margin of the pronotum; tibia with 

 four large lateral teeth with serrate margin between and a conical 

 tooth above the in turned tibial spine; femora of mesothoracic and 

 metathoracic legs with a moderate number of coarse setigerous punc- 

 tures on their ventral surfaces. 



Male minors. — Length 5.2 to 7.9 mm., width 3.0 to 4.5 mm. 

 Usually smaller than male majors or females; differing from the former 

 in the following respects : Clypeus broadly rounded and rather evenly 

 reflexed, only slightly more so anteriorly; clypeal carina pronounced, 

 highest medially; carina of vertex highest laterally, sometimes termi- 

 nating in a small sharp tubercle; clypeus rugosely punctate, but not 

 as greatly so as in the females. Pronotal protuberance often reduced to 

 a mere hump, similar to that of female; when slightly more pro- 

 nounced, protuberance as broad as the frontal carina and only slightly 

 emarginate. Two median teeth of the pronotal process becoming 

 apparent only after the process extends well over the head. Fore- 

 tibia greatly reduced in length, usually not quite as heavy as the fore- 

 tibia of the female, and lacking the apical conical tooth over the tibial 

 spine. In other respects the male minors are similar to the male 

 majors. 



