NORTH AMERICAN GEOTRUPINAE — ^HOWDEN 201 



Length 6.5 to 14 mm., greatest width 4 to 8 mm. 



Color of dorsum shining orange-brown to dark red-brown, with 

 eyes, tips of horn, edge of eye canthiis, posterior edge of pronotum, 

 and sutm'al intervals darker brown to black. Antennal club light 

 yellowish brown in color. Ventral portions of thorax and abdomen 

 the same or slightly darker in color than dorsally. Tibiae darker 

 brown to black. In male, punctm-es of vertex moderately numerous 

 and rather fine, punctures usually more numerous and pronounced 

 in females. Punctures coarse and numerous on the eye canthi and on 

 the base of the clypeal horn of both sexes. Anterior and lateral 

 margins of pronotum heavily and coarsely punctured, as is a narrow 

 band running from the transverse carina to the posterior pronotal 

 margin. On either side of this is a transverse band of coarse punc- 

 tures, parallel to the posterior pronotal margin, and midway between 

 the margin and the transverse carina, extending almost to the pointed 

 lateral carina. Very minute secondary punctures are scattered over 

 the entire pronotum. Punctures in elytral striae shallow to moderate, 

 separated by a distance usually greater than their own diameter. 

 Elytral punctures without setae except those on the margins and 

 epipleura, where a few of the punctures bear long reddish setae. Five 

 well developed striae between sutural interval and umbone. The 

 second and fourth intervals, which are wider than the adjacent ones, 

 each have a row of minute punctures (pi. 2, fig. 9) (similar to the ob- 

 solete second and fifth striae in some Bolbocerosoma) . Humerus of 

 elytron bearing a small sharp tubercle at edge. Foremargin of eye 

 canthus scarcely produced forward at outer angle and broadly rounded 

 in both sexes. The lamellae of the antennal club noticeably longer 

 than the eye (pi. 2, fig. 7). Male with pronounced clypeal horn, 

 usually longer than wide, bifid at tip. Poorly developed transverse 

 carina on vertex. Pronotal modification with well developed trans- 

 verse carina, deep lateral limiting grooves and pointed lateral carinae, 

 which are almost the height of the transverse carina. In the female 

 the clypeal horn is small, short, and slightly bifid. The transverse 

 carina of the vertex is better developed than in the male, longer than 

 the clypeal horn, and somewhat bifid. The pronotal modifications 

 of the female are similar to those of the male but smaller and less 

 pronounced. 



Genitalia and genital capsule of male poorly sclerotized, no useful 

 constant characters noted. 



The above description of the male was based mainly upon a speci- 

 men from Oxford, N. C. 



Variation in this species is extreme, eastern specimens usually being 

 smaller, with more pronounced punctures, and darker than western 

 ones. However, a specimen in my collection from Alpine, Calif., 



