62 NORTH AMERICAN 



divergent posteriorly, just perceptibly longer than basal width, and rather 

 feebly arcuate; together rather broadly and strongly emarginate behind; 

 suture about one-third as long again as the pronotum ; surface rather convex, 

 very feebly impressed on the suture near the base, rather finely and moder- 

 ately closely punctured ; punctures confused near the exterior margins, more 

 distant and even near the suture, where they are sejdom coalescent ; inter- 

 spaces nearly flat, polished. Abdominal segments decreasing uniformly and 

 gradually in width, first as wide as the contiguous elytra ; surface very broad, 

 rather coarsely, closely, and evenly punctulate, much more finely so toward 

 the tip, and also finer at the apices of the segments than at the bases ; trans- 

 verse carinae tricuspid, middle cusps strong, rather long and finely acumi- 

 nate at tip, lateral scarcely one-half as long, broad, somewhat rudimentary. 

 Legs rather short and stout, black throughout; first joint of the posterior 

 tarsi two-thirds as long again as the second, somewhat longer than the last, 

 second much longer than the third, first four joints cylindrical and equal 

 throughout in thickness, fifth joint narrower at base than at tip. 



Male. — Unknown. 



Female. — Sixth ventral segment broad and evenly, though rather obtusely 

 rounded behind. 



Length 3.1 mm. 



Tenino, Washington Territory, 1. 

 This is a very distinct species. 



43. S. convictor n. sp. — Form very moderately robust. ^Pubescence 

 short, tine, rather close except at the tip of the abdomen, where it is tine, 

 long, sparse, and recumbent, piceous. Head robust, not twice as wide as 

 long; interocular surface nearly three times as wide as the eye, fiat, closely; 

 rather coarsely, evenly, and sub-variolately punctate, punctures often coales- 

 cing ; longitudinal elevation narrower than the lateral portions, evenly and 

 rather strongly convex ; ocular lines meeting at one and one-half lengths in 

 advance; antennae slightly longer than the width of head, slender, piceous- 

 black, club moderate ; third joint one-third as long again as the fourth, 

 fourth very slightly longer than the fifth, eighth as long as the ninth, last 

 joint much elongated, acuminate at tip; maxillary palpi rather long- anil 

 slender, first joint translucent, testaceous, remainder piceous-black. Pro- 

 thorax robust, arcuately widening to the middle, where it is five-sixths as 

 wide as the head and as broad as long ; sides thence rather strongly conver- 

 gent, and very feebly sinuate ; anterior margin shorter and more arcuate 

 than the posterior; surface slightly swollen along the sides and at the edges 

 of the canaliculation, transversely and rather strongly impressed just behind 

 the anterior margin ; rather finely, very closely, evenly, and very confusedly 

 punctate ; punctures sub-variolate, very irregular in outline ; canaliculation 

 rather narrow, impressed, terminating at equal distances from the margins, 

 three-fourths as long as the pronotum. Elytra at base just perceptibly 

 broader than the head ; sides very moderately divergent posteriorly, longer 

 than the width at base, 'and feebly arcuate ; together broadly and very feebly 

 emarginate behind ; suture nearly one-third as long again as the pronotum ; 

 surface rather convex, impressed on the suture toward the base ; very closely, 



