North Americmi Species of Trogophloeus. 331 



than the prothorax, each broadly and distinctly impressed near the 

 suture toward base ; disk somewhat coarsely, but not very densely 

 punctate. Abdomen slightly narrower than the elytra, much narrower 

 at apex than at base ; border rather narrow and deep ; surface polished, 

 not at all reticulate, each segment moderately coarsely, but not densely 

 punctate at base and almost impunctate at apex. Length 2.8 mm. 



Kentucky 2, Mr. Lugger ; Virginia (Lee Co. 1), Mr. Schwarz. 



The above description is taken from the male. In the female 

 the antennae are much shorter, equal in length to the head and 

 prothorax, the outer joints shorter and more robust, two to four 

 decreasing very rapidly in length, the ninth and tenth equal in 

 length, and both distinctly transverse. The abdomen, also, is 

 less distinctly narrowed at apex. For the genus Trogophloeus^ 

 these sexual differences are very marked. 



4. T, corvinus n. sp. — Robust, moderately depressed, intense black 

 throughout, tarsi very slightly piceous ; pubescence rather coarse, long 

 and rather conspicuous on the abdomen, elsewhere short ; integuments 

 polished. Head distinctly narrower than the prothorax, moderately 

 convex, deeply, moderately coarsely, and rather densely punctate later- 

 ally, almost impunctate in the middle ; prominences rather short, 

 strong ; eyes moderate, convex, and, but slightly prominent ; tempora 

 broadly rounded and convergent to the neck, short, not at all promi- 

 nent ; antennae slightly longer than the head and prothorax, moder- 

 ately slender ; joints two to eight longer than wide, two to four de- 

 creasing slowly in length, ninth as wide as long, slightly longer than 

 the tenth which is one-third wider than long. Prothorax two-fifths 

 wider than long, widest in the middle, where the sides are obtusely and 

 distinctly subangulate, thence feebly convergent and feebly arcuate to 

 the apex, more strongly convergent and distinctly sinuate to the base, 

 which is four-fifths as wide as the disk, and but slightly narrower 

 than the apex, the latter truncate ; apical angles not appreciably 

 rounded ; disk deeply, moderately coarsely and densely punctate through- 

 out ; basal impression strong, nearly transverse and abruptly arcuate 

 laterally, the surface immediately behind it strongly tumid. Elytra 

 slightly wider than long, one-half longer and nearly one-half wider than 

 the prothorax, broadly impressed near the suture toward base, deeply, 

 coarsely and moderately densely punctate. Abdomen very slightly 

 narrower than the elytra, slightly narrower at apex ; segments sparsely 

 punctate, the punctures coarser toward the base of each. Length 2.7 

 mm. 



Massachusetts (Lowell 2). Mr. F. Blanchard. 



This description is also taken from the male, the female pre- 



