COLEOPTERA. 81 



middle cusps as broad at base as long, rapidly and rather finely acuminate, 

 lateral nearly as long, broad, and confused. Legs moderate in length and 

 very slender, black throughout ; first four joints of the posterior tarsi decreas- 

 ing very uniformly and gradually in length, first scarcely one-third longer 

 than the second, two-thirds as long as the last. 



Mule. — Unknown. 



Female. — Sixth ventral segment acutely rounded behind. 



Length 3.0 mm. 



Northern California, 1. 



This species greatly resembles costal is, and differs from it in the 

 structure of the prothorax, it being much more cylindrical than in 

 that species and proportionally very much narrower ; it also differs 

 notably in the length of the antennae and proportional lengths of the 

 joints, and in the much more plentiful and conspicuous cinereous 

 pubescence of the under surface of the abdomen. The general form 

 is more slender, and the elytra are longer in proportion to their width 

 than in costalis. 



62. S. llictuosus n. sp. — Form robust. Pubescence xery short, rather 

 sparse, recumbent, fine, plumbeous. Head small, but robust, not twice as 

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

 unequally trilobed by the moderately conspicuous sulcations ; intermediate 

 surface rather strongly and evenly convex, somewhat prominent ; punctures 

 rather coarse, close, evenly distributed, except in the sulcations, where they 

 are more crowded; ocular lines meeting at slightly more than two lengths in 

 advance; antennae much longer than the width of head, black, slender, club 

 moderate ; third joint one-third as long again as the fourth, fourth and fifth 

 equal, sixth and seventh equal in length, the latter thicker, eighth cordate, 

 slightly longer than wide, joints of club all robust, increasing in length, last 

 joint feebly acuminate at tip ; maxillary palpi long, piceous-black, first joint 

 dark testaceous. Prothorax widest at the middle, where it is four-fifths as 

 wide as the head, and very slightly narrower than long ; sides thence mode- 

 rately convergent posteriorly and slightly sinuate; anterior and posterior 

 margins equal in length, the former rather feebly arcuate, the latter almost 

 straight ; surface very faintly uneven ; finely, closely, and evenly punctate ; 

 punctures sub-variolate and generally irregularly polygonal ; canaliculation 

 obscurely outlined, shallow, narrow, beginning before the middle, one-half as 

 long as the pronotum. Elytra at base distinctly wider than the head ; sides 

 very feebly divergent posteriorly, much longer than the width at base-, very 

 feebly arcuate, more strongly so posteriorly ; together rather narrowly, sub- 

 triangularly, and somewhat strongly emarginate behind ; suture about one- 

 half as long again as the pronotum ; surface very feebly impressed along the 

 suture, and somewhat strongly, unevenly, and longitudinally impressed in 

 the middle of each elytron toward the base, finely, closely, somewhat un- 

 evenly punctured ; punctures isolated near the suture and the base, inter- 

 spaces flat and minutely reticulated ; coalescent, and closely crowded in the 

 impressed portions. Abdominal segments decreasing uniformly and rapidly 

 Stenini. (j 



