Platynin.^ 91 



with truncate apex. The mentum tooth is well developed and 

 triangular, the palpi only moderate in length, the second joint but 

 little thicker than the others and the fourth longer than the third. 

 The antennae are very slender and filiform, with the third and 

 fourth joints equal. The prothorax is extremely finely margined 

 but not reflexed at the sides, and the foveae are narrow and very 

 feeble; they are distant from the sides as in Elliptoleus. The 

 narrow elytra have the humeri rapidly rounded, the hind wings 

 being well developed, and the striation is extremely feeble — also 

 as in Elliptoleus. The prosternum is unusually long before the 

 coxae, the met-episterna relatively narrower than in any other 

 generic group, and the coloration of the body is peculiar. The 

 anterior tarsi of the male are extremely feebly dilated. The very 

 slender hind tarsi have the lateral grooves feeble; the claws are 

 small and unusually arcuate and thick. Our two species are the 

 following: 



Body slender, moderately convex, smooth, with extremely minute and 

 feeble micro-reticulation, rather shining, flavate, the head black, 

 the pronotum broadly blackish along the middle, the elytral suture 

 also clouded except apically; under surface and legs flavate, the 

 abdomen black except at apex; head evidently though only slightly 

 narrower than the prothorax, with well developed and somewhat 

 prominent eyes, the anterior impressions very small, short and 

 feeble; antennae blackish, with the first three joints pale, scarcely 

 half as long as the body; prothorax very slightly longer than wide, 

 widest at the middle, the sides there more rounded, oblique and 

 less so anteriad and posteriad, feebly subsinuate for a short distance 

 near the rounded basal angles; base as wide as the rectilinearly 

 truncate apex, arcuate laterally; anterior impression angulate and 

 evident, the posterior nearly obsolete, the stria rather strongly 

 impressed and conspicuous, extending only between the impressions; 

 surface smooth, with some feeble transverse lines toward the stria; 

 elytra four-fifths longer than wide, three-fourths wider than the 

 prothorax, parallel, rounded at apex, without distinct sinus; striae 

 very fine, feebly impressed, finely subpunctulate; dorsal punctures 

 three. Length (cf) 5.5 mm.; width 1.45 mm. Lake Superior to 

 British Columbia. The described specimen from the latter region. 



nigriceps Lee. 



Body still more slender and smaller, similar in coloration and lustre; 

 head narrower but as wide as the prothorax, the eyes not quite so 

 large but more prominent, the impressions longer but finer; antennae 

 similar but longer, three-fifths as long as the body; prothorax nar- 

 rower and more elongate, almost a fourth longer than wide, the 

 parallel sides more feebly and subevenly arcuate, simply a little 



