04 NORTH AMERICAN 



the contiguous elytra ; surface highly polished, finely punctulate ; punctures 

 deeply impressed, much closer toward the borders ; interspaces convex ; 

 transverse carinae arcuate behind, 4-cuspid, middle cusps finely acicular, 

 lateral shorter and broader, acuminate. Legs rather short and stout, 

 piceous-black ; first joint of the posterior tarsi nearly one-half longer than 

 the second, second and third sub-equal. 



Male. — Fifth ventral segment just perceptibly emarginate in the middle at 

 apex ; sixth very broadly sinuate at apex, sinus occupying nearly the entire 

 extent of" the segmental apex, more acutely rounded at the bottom than along 

 the sides, between five and six times as wide as deep. 



Female. — Sixth segment narrow, broadly and evenly rounded behind. 



Length 3.4-4.0 mm. 



Arizona, 17 ; Columbus, Texas, 1. 



This species may be easily distinguished from incultus by its much 

 more robust form. The elytra in the female are relatively much 

 shorter than in the male, and the pronotum sometimes bears traces 

 of a long canaliculation. The anterior margin of the prothorax in 

 the type bears slight evidences of a small median sinuosity. 



73. S. integer n. sp. — Form very moderately robust. Pubescence very 

 short, extremely sparse, semi-erect, setiform, fine, and cinereous. Head 

 moderate, twice as wide Tis long ; interocular surface feebly convex, slightly 

 less than twice as wide as the eye ; equally trilobed by the very feeble, 

 rounded sulcations ; intermediate surface feebly and evenly convex ; punc- 

 tures very coarse, deep, rounded, moderately close, more isolated in the 

 middle; interspaces nearly flat, shining; ocular lines meeting at one length 

 in advance; eyes hemispherical; first joint of antennae black, second dark 

 piceous, equal in length : maxillary palpi dark piceous-brown, first joint 

 rather pale piceo-testaceous. Prothorax widest slightly behind the middle, 

 where it is four-fifths as wide as the head, and distinctly narrower than 

 long; sides thence moderately convergent posteriorly, and just perceptibly 

 sinuate ; anterior and posterior margins nearly equal in length and curva- 

 ture; surface very feebly and minutely tuberculate near the basal angles, 

 very broadly and feebly swollen in the region about the middle of the pro- 

 notum, punctures rounded, deep, variable in size, very close, and in some 

 portions rather confused. Elytra at base as wide as or just perceptibly 

 wider than the head ; sides rather feebly divergent posteriorly, longer than 

 the width at base, moderately arcuate ; together broadly, evenly, and some- 

 what strongly emarginate behind : suture one-fourth as long again as the 

 pronotum ; surface deeply impressed on the suture at the base ; rather 

 coarsely, very closely, deeply, and very irregularly punctured and chan- 

 neled. Abdominal segments decreasing uniformly and very gradually in 

 width, first as wide as the contiguous elytra; surface broadly convex, rather 

 coarsely and feebly punctulate ; transverse carina 4-cuspid, cusps nearly 

 equal in length, moderately long and finely acuminate, lateral often double, 

 or strongly and widely bifurcate, at other places broad ard gradually becom- 

 ing amalgamated with the general surface of the segment. Legs moderate 



