COLEOPTERA.. 117 



close, moderate in size, round, not coalescent, evenly distributed ; interspaces 

 feebly shining"; ocular lines meeting at one and one-half lengths in advance; 

 antennae somewhat longer than the width of head, rather slender, piceous- 

 black, club moderate ; third joint one-half longer than the fourth, fourth 

 and fifth sub-equal, sixtli distinctly longer and less robust than the seventh, 

 eighth slightly longer than wide, as broad as the seventh, regularly oval, 

 joints of club increasing very slightly in length, last two notably more robust 

 than the ninth and equal in thickness ; maxillary palpi moderate in length, 

 first joint piceo- testaceous, remainder piceous-black. Prothorax robust, 

 wiliest slightly before the middle, where it is seven-eighths as wide as the 

 bead, and very slightly narrower than long; sides thence feebly and evenly 

 arcuate anteriorly, rather more strongly convergent posteriorly and nearly 

 straight ; anterior margin slightly longer than the posterior, equally arcuate ; 

 surface very evenly convex, finely, very closely, and evenly punctate; punc- 

 tures round, -not coalescent, deeply impressed ; interspaces feebly convex, 

 scarcely one-third as wide as the punctures, minutely reticulate and some- 

 what feebly shining. Elytra at base nearly as wide as the head ; sides 

 moderately divergent posteriorly, slightly longer than the width at base, 

 distinctly and evenly arcuate ; together broadly, roundly, and strongly 

 emarginate behind; suture one-fourth longer than the pronotuni ; surface 

 impressed on the suture at the base, and very feebly so near the humeri ; 

 evenly, rather finely, and closely punctate ; punctures round, deeply im- 

 pressed ; interspaces generally two-thirds as wide as the punctures, slightly 

 convex and minutely reticulated. Abdominal segments decreasing very 

 gradually in width, first as wide as the contiguous elytra ; sides feebly 

 arcuate ; border distinct on all the segments ; surface very coarsely, moder- 

 ately closely, and evenly punctate, much more finely so posteriorly ; trans- 

 verse carinae 4-cuspid, middle cusps very closely approximate, shorter than 

 the lateral, finely acuminate; lateral large, finely acuminate, sides straight. 

 Legs rather short and slender, piceous-black ; first joint of the posterior 

 tarsi twice as long as the second, second much longer than the third. 



Mule. — Unknown. 



Female. — Sixth ventral segment very broadly angulate behind. 



Length 3.0 mm. 



Cambridge, Massachusetts, 2. 



The body is of a grayish-black color; the species is distinguished 

 by the relative shortness of the middle cusps of the abdominal carinae. 



94. S. pudidis n. sp. — Form very moderately robust. Pubescence 

 rather short, coarse, and sparse, semi-erect, plumbeo-cinereous. Head 

 moderate, slightly more than twice as wide as long ; interocular surface two 

 and one-half times as wide as the eye, distinctly convex ; equally trilobed 

 by the excessively feeble sulcations ; intermediate surface evenly and broadly 

 convex, crest broadly ami very sparsely punctate; punctures toward the 

 sides very closely crowded, polygonal, shallow, rather small and sub-vario- 

 late ; ocular lines meeting at one and one-half lengths in advance ; antennae 

 distinctly longer than the width of head, slender, basal joint black, remainder 

 piceous-brown, slightly paler toward the tip, club distinct; joints three to 



