North American Species of Trogophloeus. 369 



The eyes are very smjill for this geims and are rather strongly 

 dorsal, a portion of the tempora being seen beneath and behind 

 them when viewed vertically. It is therefore one of the inter- 

 mediate forms iQ the grouping here adopted, but belongs to the 

 present group rather than to the preceding. 



46 T, robusliiliis n. sp. — Moderately robust and convex, piceous- 

 black; elytra rufescent; legs pale brown; antennae fuscous; pubescence 

 minute and moderately dense; integuments feebly shining. Head 

 slightly narrower than the prothorax, feebly convex, minutely, veiy 

 densely and feebly punctate, and more strongly subgranulose; promi- 

 nences rather small but strong; eyes moderate, rather convex and 

 slightly prominent; antennae not very robust, very short, distinctly 

 shorter than the head and prothorax, moderately incrassate; second 

 joint nearly as long as the next two together, third more than twice as 

 long as the fourth, the latter subquadrate, tenth slightly transverse. 

 Prothorax one-fifth wider than long, widest at anterior third; sides in 

 the anterior half nearly parallel, broadly, evenly and distinctly arcuate, 

 thence more convergent and more nearly straight to the base, which is 

 nearly three-fourths as wide as the disk and very much narrower than 

 the apex; the latter subtruncate; apical angles slightly obtuse and 

 scarcely at all rounded; disk not impressed, evenly convex, finely and 

 very densely punctate, the punctures not very deep, separated by nearly 

 their own widths; median impunctate area narrow, short and slightly 

 tumid. Elytra very slightly wider than long, one-third wider and 

 longer than the prothorax, feebly impressed near the suture at base, 

 rather coarsely and densely punctate; the punctures deep, more than 

 twice as wide as those of the pronotum, separated by distinctly more 

 than their own diameters. Abdomen slightly narrower than the elytra, 

 parallel; sides very feebly arcuate; border rather narrow and deep; sur- 

 face strongly reticulate, minutely and not very densely punctate. Legs 

 moderate. Length (strongly contracted) 1.8 mm. 



New York 1. 



Allied to the simplariits group, from which it differs in the 

 iorm of the prothorax, which is, however, rather an extreme 

 limit than an essential difference of form, such for instance as 

 is exhibited in the two following species. 



47 T, con finis n. sp. — Rather slender and convex, black; legs 

 piceous, knees, tips of tibiae and tarsi flavescent ; antennae dark piceous- 

 brown, piceous at apex ; pubescence short, rather coarse and dense ; in- 

 teguments distinctly shining. Head slightly narrower than the pro- 

 thorax, fully as long as wide, rather convex, minutely and very densely 

 ipunctate ; prominences rather broad, moderate ; eyes moderate, con- 



