83 



subparallel, serrate distally on the outer margin, with a long process at the 

 inner angle. There are three types in the Leconte collection labelled 

 " Can.", and a fourth specimen from " Detroit, Mich." 



I have seen no others of the species; it is left provisionally in Thysanoes. 



Thysanoes fimbricornis Lee; loc, cit. 370, 1876. 



Length, 1-8 mm. The pronotum longer than wide, sparsely asperate 

 in front, nearly smooth behind the middle; elytra wth rows of small punc- 

 tures, interspaces with a row of short clavate bristles; outer margin of 

 tibiae not serrate. 



Host tree. — Hickory, in twigs. 



Distribution. — Pennsylvania, not known from Canada. 



The genus Micracis is not known from Canada, although several 

 species occur in the Northeastern States. M. opacicollis Lee. is abundant 

 in New York State in dead twigs of oak and chestnut, and an undescribed 

 species is found at Ithaca, N.Y., in poplar shoots. It is a slender species, 

 1-7 mm. long; the eyes narrowly separated beneath; the elytra finely 

 punctured in rows and clothed with short scale-like pubescence. M. riidis 

 Lee. was described from Detroit, Mich., but the few subsequent records 

 are from Indiana, District of Columbia, and southwestern Pennsylvania. 

 Our single specimen is from Georgia. It is a short, rather stout, very 

 coarsely sculptured species; the head deeply excavated, eyes widely separated 

 beneath, the sutures of the club broadly curved; the elytra scarcely pubes- 

 cent, coarsely and roughly punctured; length, 2-5 mm. 



THE IPIN^. 



The Genus Xyloterinus, new genus. 



The male is smaller than the female and has the front convex, not excavated 

 as in Trypodendron; the antennal club has the corneous first segment entirely 

 basal, arcuate on its front margin, not narrowly angulate and produced towards 

 the middle; the metepisternum is narrowed and sinuate in front, with the sides 

 parallel behind. 



The type is Bostrichus politus Say; hitherto included in Trypodendron 

 (Xyloterus) . 



Xyloterinus politus Say; Acad. Nat. Sci. Jour., 5: 256, 1828; ed. Lee. 2: 318; 



(Bostrichus) . 



Length, 2 • 8 to 3 • 5 mm. ; dark brown to nearly black, except the elytra 

 which are usually a nearly uniform reddish-brown; the pronotum with 

 four slender median teeth on the front margin; slightly wider than the 

 elytra, the summit well behind the middle, asperate in front and smooth 

 and very finely punctured behind the summit; the elytra with the striae 

 nearly obsolete, visible on the sides, the strial punctures very small and 

 not deep, not perfectly regular; the interstrial punctures smaller than but 

 as numerous as those of the striae, uniseriate on the disc, confused on the 

 wider lateral interspaces; the declivital striae impressed, the pubescence 

 abundant but fine and rather short. 



Host trees. — Beech, Maple, Birch, and other hardwood trees. In dying 

 trunks and large branches. 



Distribution. — Eastern Canada and Eastern United States. 



36198— 6i 



