POGONIN.E 47 







(9 ) 4-35 mm.; width 1.7 mm. California (Lake Tahoe). Two ex- 

 amples tahoensis n. sp. 



5 Color testaceous, the head and prothorax more or less infumate; sides 

 of the prothorax more strongly arcuate anteriorly and oblique and 

 straighter for a greater distance thence to the base. Form rather 

 convex, moderately stout, polished; head three-fourths as wide a.s 

 the prothorax, the eyes slightly more developed and prominent than 

 in the following three species, the sulci long, entire; fourth palpal 

 joint slightly longer than the third; antennae rufous, as long as the 

 elytra and slightly thickened distally; prothorax not quite one-half 

 wider than long, widest near apical third, the basal angles minutely 

 and feebly subprominent; anterior impression deep, subangulate, 

 the posterior feeble; stria deeply impressed; foveae deep, at lateral 

 fourth; elytra slightly less than one-half longer than wide, a third 

 wider than the prothorax, nearly one-half (9), obtusely rounded 

 at apex; striae inwardly coarse, deep and strongly punctured, feeble 

 though traceable laterally, the dorsal punctures coarse; intervals 

 strongly convex suturally. Length (cf 9 ) 3.7-4.0 mm.; width 1.5- 

 1.6 mm. Minnesota (Duluth) and Wisconsin (Bayfield). [Trechus 

 fulvusi.ec. (Epaphius Lch.) -nom. praeocc.]. Eight examples, de- 

 monstrating the constancy of coloration pallescens nom. nov. 



Color black or piceous-black, the elytra feebly opalescent, the anterior 

 parts not or scarcely paler; sides of the prothorax more evenly arcu- 

 ate, oblique and nearly straight in about basal half; legs rufous. . .6 



6 Elytra more elongate, fully two-thirds longer than wide; antennae 

 notably longer, fully as long as the elytra, very slender, evenly fili- 

 form and rufous. Body notably elongate; head two-thirds as wide 

 as the prothorax, the long sulci wholly interrupted medially in the 

 type; eyes moderate, not very prominent; prothorax slightly more 

 than one-half wider than long, the basal angles well reflexed, obtuse, 

 not rounded but not at all prominent at tip; anterior impression 

 fine, linear, the posterior evident; foveae small, deep, just beyond lat- 

 eral fourth; elytra two-fifths wider than the prothorax, gradually 

 rounding behind, parallel, with arcuate sides and rather rapidly, 

 evenly rounded humeri; striae inwardly moderate, rather impressed 

 and not coarsely but strongly punctate, gradually obsolete later- 

 ally; intervals evidently convex suturally; dorsal punctures distinct 

 but not coarse, adjoining the third stria as usual. Length (cf 1 ) 4.4 

 mm.; width 1.5 mm. Massachusetts (Fall River), Frost. 



puritanus n. sp. 



Elytra, less elongate, barely one-half longer than wide; antennae much 

 shorter, not as long as the elytra in either sex 7 



7- Form moderately stout and convex, shining, blackish-piceous; head 

 nearly three-fourths as wide as the prothorax, somewhat longer than 

 wide, the eyes notably small, slightly prominent; sulci subinter- 

 rupted; antennae very slender, fusco-rufous, slightly compressed dis- 

 tally; prothorax relatively smaller than in the preceding, one-half 

 wider than long to slightly less, the basal angles obtuse, with the 

 tip barely visibly subprominent; base slightly wider than the apex 

 (cf ), subequal in the smaller prothorax of the female; anterior im- 



