COLEOPTERA. 137 



116. S. lii isiitiis n. sp. — Form rather robust. Pubescence very long, 

 close, semi-erect, rather coarse, cinereous, conspicuous. Head rather small, 

 slightly more than twice as wide as long; interocular surface feebly convex, 

 scarcely twice as wide as the eye; longitudinal elevation distinctly wider 

 than the lateral portions, evenly and rather strongly convex ; sulcations very 

 feeble; punctures round, deeply impressed, evenly distributed ; interspaces 

 nearly as wide as the punctures, very convex and highly polished ; ocular 

 lines meeting at slightly more than one length in advance ; antennae much 

 longer than the width of head, moderately robust, very coarsely setose, 

 piceous-black, club abruptly piceous-brown, rather well developed ; third 

 joint one-fourth longer than the fourth, fourth and fifth equal, sixth much 

 shorter than the seventh, equal in width, eighth one-half longer than wide, 

 scarcely enlarged, cuneate, ninth longer than wide, tenth as long as the 

 ninth, broader than long, eleventh as wide as the tenth, acuminate, nearly 

 as long as the ninth and tenth together ; maxillary palpi short and robust, 

 piceous-black, first joint pale piceo-testaceous, third but slightly thicker 

 than the second. Prothorax robust, widest at the middle, where it is four- 

 fifths as wide as the head and just perceptibly narrower than long; sides 

 thence very slightly convergent posteriorly and feebly sinuate ; anterior 

 margin slightly longer and more arcuate than the posterior ; surface very 

 even, very feebly tuberculate near the basal angles ; punctures small, round, 

 deeply impressed, evenly distributed ; interspaces slightly wider than the 

 punctures, convex, highly polished. Elytra at base as wide as the head ; 

 sides feebly divergent posteriorly, very slightly longer than the width at 

 base, rather strongly arcuate ; together very broadly, roundly, and feebly 

 emarginate behind ; suture one-eighth longer than the pronotum ; surface 

 very convex, very feebly impressed on the suture toward the base ; coarsely, 

 very evenly punctate ; punctures deeply impressed, round; interspaces as 

 wide as the punctures, convex, highly polished. Abdominal segments de- 

 creasing arcuately and rather rapidly in width, first as wide as the contiguous 

 elytra, nearly cylindrical ; surface very highly polished, rather sparsely, 

 finely, deeply, and evenly punctulate ; lateral border nearly obsolete, except 

 on the first segment ; transverse carinae 4-cuspid, cusps rather short, equal, 

 equidistant, finely acuminate. Legs rather short and robust, black above, 

 piceous beneath ; first four joints of the posterior tarsi uniformly decreasing 

 in length, last slender and much longer. 



Male. — Sixth ventral segment very broad at apex, where it is very broadly 

 sinuate, sinus occupying nearly the entire segmental width, evenly rounded 

 and almost too feeble for measurement. 



Female. — Sixth segment angularly produced at tip. 



Length 2.5-2.7 mm. 



Detroit, Michigan, 2. 



The female associated with the above type differs from it in so 

 many points that it may prove to be a distinct species ; the pubes- 

 cence is shorter and thicker, the elytra very much shorter, the punc- 

 tuation slightly more feeble and irregular than in the male ; t lie 

 antennae, also, are entirely black. The description has been drawn 



