PTEROSTICHIN^ 335 



slightly alutaceous, with finer micro-reticulation than in the preceding; 

 head moderate, three-fifths as wide as the prothorax, with moderately 

 prominent eyes and arcuate sulci; mandibles shorter than in the preced- 

 ing types; antennae fusco-ferruginous, piceous basally; prothorax large, 

 a sixth wider than long, widest before the middle but narrowed only 

 slightly thence anteriorly, the sides oblique basally, becoming briefly 

 and barely visibly sinuate at the posterior angles which are right, not 

 rounded and minutely subprominent; base margined except medially, 

 evidently narrower than the apex, which is moderately sinuate, with 

 obtusely rounded angles; surface with some ruguliform lines, the im- 

 pressions very feeble, the anterior fine; inner fovea long, attaining the 

 base, the outer very short and feeble, delimiting a short and very feeble 

 carinule; elytra two-thirds longer than wide, a fourth wider than the pro- 

 thorax, gradually and evenly rounded behind, the parallel sides broadly 

 arcuate, the sinus long and very feeble; humeral denticles small and 

 feeble; striae rather fine, deep, extremely finely punctulate, the scutellar 

 short, wholly discal, the puncture elongate; intervals nearly flat, convex 

 on the apical declivity. Length (9) 13.0 mm.; width 4.7 mm. Cali- 

 fornia (Alameda). 



Comparable only with vicinus Mann., than which it is much 

 stouter, differing also in the feeble carina near the basal thoracic 

 angles and in the decidedly more elongate third antennal joint; the 

 sides of the prothorax are less evenly rounded, becoming more paral- 

 lel before the middle. 



Hypherpes mercedianus n. sp. Form slender, rather notably convex, 

 black, the epipleura and legs piceo-rufous, the abdomen obscure rufous; 

 elytra feebly alutaceous; head slightly elongate, two-thirds as wide as 

 the prothorax, the eyes moderate; antennae longer than the head and pro- 

 thorax, ferruginous, gradually piceous basally; prothorax slightly elon- 

 gate, widest near apical third, the sides subevenly arcuate to a small 

 sinus adjoining the right and unrounded basal angles, finely reflexed; 

 base faintly margined only very near the angles, a little narrower than 

 the feebly sinuate apex, the apical angles obtusely rounded; impressions 

 feeble; median stria well impressed; inner fovea broadly, shallowly im- 

 pressed, a fifth the total length; surface thence to the sides wholly un- 

 modified; elytra almost twice as long as wide, not quite one-half wider 

 than the prothorax, the sides feebly arcuate; striae rather fine but deep, 

 the external feebly punctulate, the scutellar wanting, represented only 

 by a very short prolongation of the puncture; intervals feebly convex. 

 Length (cf ) 14.5 mm. width 5.0 mm. California (Merced Creek). 



The type of this species was included with that of sierranus in 

 my former revision, but it can be distinguished easily by its narrower 

 and more convex form, much shorter basal sinus of the thoracic 

 sides, shorter and feebler inner foveae and very much more finely 

 reflexed edges, and also by the obsolete scutellar stria. The dimen- 

 sions of the Lake Tahoe female type of sierranus are 14.5 by 5.4 mm. 



