North American Species of Trogophlmus, 373 



more than usually interallied; they are easily distinguishable in 

 common by the form of the prothorax, its general freedom from 

 any distinct impressions, and by the slightly more robust and 

 convex form. These species generally resemble the genus 

 Bledius, and often display a decidedly close aflBnity with it, 

 merely, however, in external form, for all the generic'characters 

 are perfectly Trogophloeoid. The resemblances are, therefore, 

 probably as likely to have resulted from mimicry or similarity 

 of physical conditions of life, as from any other circumstance. 



51 T. simplarius Lee— Trans. Am. Ent. Soc, VI., p. 344. 



The original description appears to coincide with the type, 

 except the phrase " Prothorax . . . without dorsal line. ^^ There 

 is a very fine but distinct median impunctate line as in palli- 

 duhis, 



52 T, pallidulu§ n. sp. — Rather robust, moderately convex, pale 

 castaneous; abdomen darker, nearly piceous; legs pale flavate; antennae 

 pale rufous; pubescence very fine, short and dense; integuments aluta- 

 ceous. Head nearly five-sixths as wide as the prothorax, feebly convex, 

 excessively minutely and densely punctate; prominences very large 

 and strong; eyes large, very coarsely faceted, rather prominent; an- 

 tennae short and rather robust, shorter than the head and prothorax, 

 outer joints slightly transverse; basal joint as long as the next two to- 

 gether, second very slender, as long as the next two together, fourth 

 scarcely longer than wide. Prothorax large, two-fifths wider than 

 long, widest slightly behind the middle, where the sides are obtusely 

 subangulate, the angle slightly rounded, thence just visibly convergent 

 and feebly arcuate to the apex, more strongly convergent and straight 

 toward base; the latter subtruncate between the very broadly rounded 

 basal angles, nearly four-fifths as wide as the disk; apex distinctly 

 wider than the base, broadly, feebly arcuate; apical angles nearly right, 

 very narrowly rounded; disk broadly, evenly convex, without trace of 

 impression, with a very narrow, smooth, impunctate median line^ 

 minutely, evenly and extremely densely punctate. Elytra about equal 

 in width to the prothorax and one-third longer, slightly shorter than 

 wide, broadly, feebly impressed on the suture at base, finely, very 

 densely punctate; punctures separated by their own widths; inner apical 

 angles narrowly rounded. Abdomen very slightly narrower than the 

 elytra; sides parallel, nearly straight; border relatively narrow, mode- 

 rately deep; segments scarcely perceptibly impressed at base; surface 

 feebly convex, very minutely and densely punctate. Legs slender. 

 Length 2.9 mm. 



