PTEROSTICHIISME 329 



raised line; surface feebly convex, with widely separated wavy ruguli- 

 form lines, the stria moderate; impressions subobsolete; basal foveae 

 long, broadly impressed, the bottom sharply linear; at the sides basally 

 there is a very feeble longitudinal impression, between which and the 

 sides the surface is feebly elevated; elytra three-fifths longer than wide, 

 at the middle barely a fifth wider than the prothorax, the sides parallel 

 and evenly arcuate; apex obtuse, with feeble subapical sinus; striae deep, 

 impunctate, the scutellar moderate, oblique; intervals broadly convex, 

 more strongly toward the sides and apex. Length (9 ) 13.0 mm.; width 

 5.3 mm. Canada (west of the Rocky Mts.-). 



This species may be placed near breviusculus, but is still shorter, 

 with relatively much larger and more convex prothorax and smaller 

 head; in breviusculus and others of that special section, the posterior 

 thoracic puncture, closely placed in the hind angles, is similarly in- 

 closed within a small elevated ring. 



Hypherpes spissitarsis n. sp. Elongate, subparallel, slightly convex, 

 deep black and shining, the legs and tarsi black; head two-thirds as wide 

 as the prothorax, the swollen sides behind the eyes as prominent as the 

 latter; mandibles finely punctulate distally; antennae black, moderately 

 stout; prothorax a fifth wider than long; sides parallel and broadly, 

 evenly arcuate from the distinctly produced and rather sharp apical 

 angles, becoming broadly, just visibly sinuate in about basal fourth; 

 base broadly sinuate medially, equal in width to the deeply sinuate apex 

 and feebly margined laterally, the angles right, not rounded; impres- 

 sions barely traceable; inner fovea long, the outer short, abruptly de- 

 fined externally; elytra three-fourths longer than wide, parallel and with 

 feebly arcuate sides and rapidly rounded obtuse apex, a fifth wider than 

 the prothorax; humeri strongly dentate; subapical sinus broad and feeble; 

 striae not fine, deeply impressed and with minute punctulation along the 

 bottom of the grooves, the scutellar short, with distinct ocellate puncture; 

 intervals distinctly convex; inner side of the hind tibiae serrate, the hind 

 tarsi short, thick, not three-fourths as long as the tibiae, not grooved ex- 

 ternally; anterior tarsi broadly dilated, deep black; sides of the body 

 beneath sparsely punctate. Length (cf ) 17.5 mm.; width 6.2 mm. Cal- 

 ifornia (Lake Tahoe). A single example. 



This species is allied rather closely to tar sails Lee., from the same 

 region, but it is narrower, more convex, with smaller head, more 

 evenly rounded sides of the prothorax and with more prominent 

 and sharper apical angles, less strongly punctured sides of the body 

 beneath and other features. The last ventral segment of the male 

 has no tolerably definite transverse apical impression as in tar sails, 

 but the surface is gradually turned downward apically. The ely- 

 tral striae are more definitely punctulate in tar sails than in spissi- 

 tarsis; they are not impunctate as stated by LeConte. 



