COLEOPTERA. 31 



there is an oval patch which is coarsely, very closely, and tortuously chan- 

 neled. Abdominal segments decreasing extremely gradually and regularly 

 in width, first as wide as the contiguous elytra ; border at first very promi- 

 nent; surface convex, extremely finely punctulate ; transverse carinae tri- 

 cuspid, middle cusps line and acicular, lateral rudimentary, intervals broadly 

 sinuate. Under surface piceous. Legs moderate, pale piceous-brown ; first 

 joint of posterior tarsi two-thirds longer than the second, second nearly as 

 long as the third and fourth together. 



Male. — Unknown. 



Female. — Posterior edge of the sixth ventral segment very evenly rounded. 



Length 3.3 mm. 



Middle States, 1. 



The elytral sculpture of this species is so peculiar that it can 

 scarcely be mistaken if at all constant ; the oval channeled patch is 

 quite isolated in a generally smooth held. 



16. S. sectiltor n. sp. — Form very moderately robust. Pubescence 

 rather short, coarse, semi-erect, much more plentiful along the sides of the 

 abdomen, fulvous throughout. Head moderate in size, twice as wide as 

 long ; interocular surface moderately depressed, longitudinal elevation nar- 

 rower than the lateral portions, very strongly and evenly convex, sulcations 

 very prominent; punctures close, deep, rather confused, longitudinally elon- 

 gated ; ocular lines meeting at one length in advance ; antennae slender, 

 slightly longer than the width of head, basal joint black, remainder rather 

 pale piceous-brown, club moderate ; third joint slightly less than one-half 

 longer than the fourth, fourth and fifth equal in length, sixth very slightly 

 longer and much thinner than the seventh, eighth nearly twice as long as 

 wide, slightly thinner than the seventh, and as long as the ninth, joints of 

 club increasing in length, last two of equal thickness and more robust than 

 the ninth ; maxillary palpi piceous-brown throughout, first joint scarcely 

 perceptibly paler. Prothorax widest at the middle, where it is distinctly 

 narrower than long ; sides thence equally convergent anteriorly and poste- 

 riorly, slightly arcuate in the former, deeply sinuate in the latter direction n 

 anterior and posterior margins nearly equal in length and curvature ; surface 

 distinctly tuberculate at a short distance from each basal angle, and slightly 

 impressed on the Hanks of the pronotum in the middle, finely, very closely, 

 confusedly punctate, interspaces granulose and scarcely shining ; canalicu- 

 lation short, narrow, and very deep, cleft-like, one-half as long as the pro- 

 notum, beginning slightly before the middle. Elytra at base as wide as the 

 head; sides feebly divergent posteriorly, slightly longer than the width at 

 base, distinctly and nearly evenly arcuate; together broadly and very 

 moderately emarginate behind; suture nearly one-fourth longer than the 

 pronotum; surface feebly impressed on the suture at the base, moderately 

 coarsely, closely, somewhat deeply, and very irregularly punctured and 

 channeled, interspaces as on the pronotum, though slightly broader. Abdo- 

 minal segments decreasing just perceptibly in width, first slightly narrower 

 than the contiguous elytra; surface finely and closely punctulate, and dis- 



