HARPALIN.E 105 



the elytra (9) only feebly alutaceous; margins of the prothorax 

 testaceous; under surface black, the epipleura pale except basally; 

 femora black, pale at base; tibiae obscurely rufous, generally black 

 apically, the tarsi and parts of the coxae rufous; antennae and palpi 

 slender, testaceous; head fully three-fifths as wide as the prothorax, 

 the eyes prominent ; foveae perforate, the frontal suture nearly obsolete ; 

 prothorax fully one-half wider than long; sides rather feebly arcuate, 

 less so to straight basally; apex rather deeply sinuate, narrower than 

 the base; surface smooth, the transverse impressions feeble but 

 visible medially, the marginal gutter flatter and broader toward the 

 vanishing point near basal third, than in the preceding, the foveae 

 short, broadly impressed and less linear than usual, sparsely punctu- 

 late, the convex surface thence to the sides rarely with a few very 

 fine punctures; elytra two-fifths longer than wide, slightly though 

 very evidently wider than the prothorax, very obtuse at apex, 

 parallel, the sinus vestigial; striae very deeply impressed, less so ( 9 ), 

 the intervals (cf ) strongly convex, the puncture at or rather behind 

 apical fourth; scutellar stria well developed; basal joint of the hind 

 tarsi about as long as the fifth. Length (cf 9 ) 7.5-9.0 mm.; width 

 2.8-3.25 mm. California (Placer Co.) to British Columbia (Met- 

 lakatla) somnulentus Dej. 



Body much larger and more convex, polished, deep black throughout, 

 the anterior and middle tarsi (cf ) rufo-piceous; antennae and palpi 

 dusky testaceous, the former paler at base, the latter at the apices 

 of the joints; head rather small though evidently more than half as 

 wide as the prothorax, the eyes prominent; foveas small and per- 

 forate, the antennae slender; prothorax not very transverse and as 

 wide as the elytra, two-fifths wider than long; sides broadly arcuate, 

 less so or nearly straight basally, the angles rounded; apex rather 

 deeply sinuate, much narrower than the base, the latter transverse 

 and straight, finely and deeply margined throughout; surface 

 smooth, the lateral gutter but feebly enlarged, feebly defined and 

 inclined posteriorly, vanishing behind basal third, the foveae narrow, 

 rather long, linear though broadly impressed, deep and punctured, 

 the surface thence to the sides evenly convex with the general 

 surface and impunctate; stria fine but rather broadly impressed; 

 elytra rather more than one-half longer than wide, rounded behind 

 in about two-fifths, the parallel sides broadly arcuate; sinus not 

 distinct, vestigial; striae fine, feebly impressed, the scutellar joining 

 the first; intervals nearly flat, the puncture near apical fourth; basal 

 joint of the hind tarsi much shorter than the fifth. Length (cf) 

 10.5 mm.; width 3.8 mm. Yellowstone National Park, Wirt 

 Robinson pellax n. sp. 



31 Sides of the prothorax rounding basally, the basal angles very obtuse 

 and broadly rounded 32 



Sides of the prothorax less converging and nearly straight behind the 

 anterior arcuation, the basal angles but little more than right and 

 much less broadly rounded 33 



32 Form oblong, moderately convex, strongly shining, black, only the 

 ambient bead of the pronotum rufescent; under surface and epi- 



