22 NORTH AMERICAN 



Sides of prothorax strongly sinuate behind ; surface of pronotum 

 rather densely and coarsely sculptured. Washington Territory. 



l(i. sectator. 

 Elytral suture much longer than the pronotum. 



Prothorax widest in advance of the middle ; head small, slightly 



narrower than the elytra at base 17. ZIHIM'IIS. 



Prothorax widest at or behind the middle; head large, as wide as 



or slightly wider than the elytra at base 18. femora t us. 



Transverse carinae of abdomen rudimentarily 4-cuspid. Washington Terri- 

 tory 19. tacomae. 



8. S. SCIllptilis n. sp. — Form robust. Pubescence very fine, sparse, 

 plumbeous, and almost invisible, except on the abdomen, where it is short, 

 coarser, close, evenly distributed, sub-recumbent, and fulvous in color. Head 

 moderate, more than twice as wide as long ; interocular surface moderately 

 depressed, nearly three times as wide as the eye ; longitudinal elevation as 

 wide as the lateral portions, abruptly rising, evenly and very strongly con- 

 vex ; punctures in this region evenly distributed, not coalescent, round, and 

 very close, near the eyes the punctures are confusedly coalescent; ocular 

 lines meeting at about two lengths in advance; antennae long, distinctly 

 Linger than the width of head, very slender, club prominent and loose, 

 throughout pale piceous-brown ; third joint one-half longer than the fourth, 

 fourth and fifth equal, sixth very slightly longer and somewhat less robust 

 than the seventh, eighth two-thirds as long as the seventh, more than twice 

 as long as wide, rather abruptly larger toward tip, joints of club of equal 

 length, slightly longer than the eighth ; maxillary palpi long, basal joint 

 and basal half of the second rather pale piceo-testaceous, remainder pale 

 piceous-brown, third joint very long, strongly flattened; mentum having 

 four stout yellow setae arranged transversely near the base. Prothorax 

 widest in the middle, where it is live sixths as wide as the head, and just 

 perceptibly narrower than long ; sides thence strongly convergent posteriorly 

 and rather strongly sinuate ; anterior and posterior margins equal in length, 

 the former slightly the more arcuate ; surface with two strongly impressed 

 pits at the base, and two at the vertex, strongly tuberculate near the basal 

 angles, transversely and strongly impressed just behind the vertex, extremely 

 closely, deeply, and very confusedly punctured and channeled, interspaces 

 very acute ; canaliculation very strong, deeply impressed, fusiform, two-thirds 

 as long as the pronotum, terminating slightly nearer the apex than the base, 

 bottom sparingly punctate, edges narrowly and acutely swollen. Elytra at 

 base as broad, or very slightly broader than the head; sides feebly diver- 

 gent, slightly longer than the width at base, rather feebly arcuate; together 

 broadly, angularly, and deeply emarginate behind; suture nearly one-half 

 longer than the pronotum ; surface broadly impressed on the suture at the 

 base, rather finely, extremely closely, and irregularly channeled, channels 

 long, deep, and very tortuous, interspaces acute. Abdominal segments 

 decreasing uniformly and rapidly in width, first much narrower than the 

 contiguous elytra; surface rather convex, extremely finely and irregularly 

 punctulate ; transverse carinae tricuspid, cusps broader than long, intervals 



