HISTERID^: 259 



The impression at each side of the thoracic apex is deeper than in 

 typical discoidalis and the prothorax is a little shorter. 



Group II of Horn has as types planisternus and perhaps also 

 rugipennis, both aberrant species; behrensi belongs to Group IV. 

 Group III consists of the aberrant interstitialis of LeConte. 



Group IV (pectoralis} . 



In this group the prosternal striae are long, parallel and nearly 

 straight. The species are moderately numerous and rather above 

 the average of the genus in point of size, though not so large as 

 those of the lugens group; the two following are hitherto un- 

 described : 



Saprinus cheyennensis n. sp. Oval, convex, shining, black, the elytra 

 and under surface faintly picescent, the legs piceo-rufous; head finely, 

 not densely punctate, with a discal fovea on the occiput and an oblique 

 anterior stria at each side; prothorax less than twice as wide as long, the 

 sides moderately converging and feebly arcuate, more rounding anteri- 

 orly, the coarse marginal groove not quite attaining the base; surface 

 with very minute sparse punctures, abruptly coarse and dense toward 

 the sides, the base confusedly punctate throughout the width; surface 

 anteriorly not impressed; scutellum small, equilateral; elytra one-half 

 longer than the prothorax, slightly inflated at base, not very coarsely 

 but strongly, evenly and moderately closely punctate, very gradually 

 finely and obsoletely basally; near the suture the punctures are traceable 

 almost but not quite to the base; discal striae parallel in curvature, the 

 first extending to apical fourth and very coarse, two to four gradually 

 shorter and rather fine throughout, the fourth united at base with the 

 sutural, which extends to apical fifth; outer subhumeral wholly wanting 

 and forming part of the lateral stria, the inner disintegrated but traceable 

 from the end of the oblique humeral to apical fourth; pygidia densely, 

 not coarsely punctate, the propygidium very densely; mesosternum 

 strongly, closely punctate, its marginal groove broadly sinuate, the 

 suture fine, straight and distinct; anterior tibiae with about seven 

 serrules. Length 4.2 mm.; width 3.0 mm. Wyoming (southeastern). 



This species is allied to pectoralis Lee., but is larger, and the elytral 

 punctures are somewhat less coarse and very much closer, more 

 gradually disappearing anteriorly; the thoracic punctures are much 

 coarser and denser toward the sides, and the elytral striae are dis- 

 tinctly longer; the inner subhumeral stria is long and evident and 

 not wanting as it is in pectoralis, which is more southern in habitat. 



Saprinus suflfusus n. sp. Broadly oblong-oval, moderately convex, 

 smooth and shining, black, the elytra externally and nubilously, and 

 the legs, red; head finely punctulate, not striate laterally, the occiput 



