North American Species of Trogophlceus. 365 



shortening of the tempora; the latter, however, still remain as 

 prominent as the eye, and it is therefore a more nearly normal 

 form for the group than the following. 



44 T. <1elicatu§ n. sp. — Slender and somewhat depressed, piceous; 

 elytra paler, rufo-piceous; abdomen black; legs dark brownish-flavate; 

 antennae piceo-castaneous; pubescence extremely fine, short, and dense; 

 integuments subalutaceous. Head very slightly narrower than the pro- 

 thorax, moderately convex, minutely and very densely punctate; promi- 

 nences small but strong; eyes large, moderately convex and but slightly 

 prominent, much more than usually finely faceted; tempora short, 

 scarcely more than one-third as long, narrowly rounded and not quite 

 as prominent as the eye; antennae rather slender, distinctly capitate, as 

 long as the head and prothorax; joints two to four decreasing very 

 rapidly in length, the fourth much wider than long, second more robust, 

 tenth distinctly transverse. Prothorax two-fifths wider than long, 

 widest at anterior third, where the sides are evenly and rather strongly 

 rounded and coarctate to the apex, moderately convergent and nearly 

 straight toward base; the latter feebly arcuate, four-fifths as wide as 

 the disk and slightly narrower than the apex; the latter transversely 

 truncate; apical angles slightly obtuse, not distinctly rounded, the basal 

 broadly rounded; disk very fiaely and extremely densely punctate; 

 median line not at all impunctate, although slightly tumid toward base; 

 surface very feebly bi-impressed, the impressions almost completely 

 interrupted in the middle, so as to form four feeble oval impressions. 

 Elytra slightly longer than wide, one-third wider and three-fourths 

 longer than the prothorax, very feebly impressed near the suture to- 

 ward base, finely and densely punctate. Abdomen scarcely at all nar- 

 rower than the elytra, parallel; sides nearly straight; border wide and 

 very shallow; surface finely reticulate, minutely and very densely punc- 

 tate. Legs normal. Length 1.3 mm. 



Michigan (Detroit 1). Mr. E. A. Schwarz. 



Quite distinct from any other in this group, except the pre- 

 ceding, in its larger eyes and relatively shorter tempora; in fact, 

 it constitutes an apparent transition from the present group to 

 the following. 



Group V. 



A large section of this extensive group shows considerable 

 affinity with Bledius in the form of the prothorax, but in scarcely 

 any other way, the species of this section being closely allied 

 and often difficult to identify from descriptions. The group is 

 somewhat heterogeneous, containing several sections which differ 

 considerably from each other in general form and appearance. 



