668 FAMILY IV. SCOLYTIDJE. 



aa. Beak not carinated; small, slender, dark brown, elytra coarsely punc- 

 tured in rows, with rows of short, suberect hairs. 



c. Intervals of elytra opaque, rough with small granules. 1081. TENTHS. 

 cc. Intervals of elytra somewhat shining, rugose. 1082. EXILIS. 



H. nigrinus Mann, mentioned by Evans (1895) and H. scobinosus Eich. 

 (1868, 146) are omitted as doubtfully occurring in eastern America. 



1079 (9192). HYLASTES. PORCULUS Erichs., 1836, 49. 



Cylindrical, stout, narrowed in front. Nearly black, except feet and 

 antennae which are chestnut red. Beak short, stout, obliquely excavated on 

 side for reception of antennae, which have short, 7-jointed funicle, small 

 oval, distinctly annulated club, of which the basal half is shining and nearly 

 glabrous; head visible from above. Thorax deeply excavated for reception 

 of head, deeply punctured, marked with a distinct smooth dorsal line. 

 Tibiae broadly dilated and serrate; first and fifth ventral segments con- 

 spicuously longer than others. Length 4 4.5 mm. 



Malaga, N. J., April 30, in pine roots. (Wenzel.) Occurs in 

 the Atlantic coast states from New York to Florida, west to 

 Michigan, Colorado and Alaska, "in bark of dying pine." (Hop- 

 kins. ) Fitch's type was captured the middle of July in his yard. 

 H. carbonari us Fitch and ccircmosus 7Amm. are synonyms. 



1080 ( ). HYLASTES SALEBROSUS Eich., 1868, 146. 



Resembles the preceding so closely that the differences only will be 

 given. Zimmerman says "prothorax slightly longer than wide [but shorter 

 than in porculus], less deeply punctate, elytra very deeply striate, striae 

 less evidently punctured, intervals very deeply rugose," Eichhoff (1896) 

 says "disk of elytra strongly convex, fine punctures at the bottom of the 

 narrow elytral striae, and with coarsely transversely rugose interstices, 

 which are wider than in the allied species." Length 4.5 5 mm. 



Occurs in Atlantic States and Eastern Canada. Food plant, 

 unknown. This is the porculus of LeConte (1ST6), he having 

 erred in identification. H. scabripenms Zinim. is a synonym. 



1081. (9196). HYLASTES TENTHS Eich., 1868, 147. 



Slender, dull black, tolerably thickly clothed with short yellow hairs. 

 Beak not carinated, broadly transversely impressed near tip, antennae and 

 head as in preceding. Thorax longer than wide, thickly punctured, with a 

 smooth, slightly elevated line, somewhat indistinct, nearly straight on the 

 sides, apex broadly, base feebly rounded. Elytra with broad flat striae 

 thickly set with transverse punctures, intervals very narrow and elevated; 

 tibiae coarsely serrate. Length 2 3.75 mm. 



Sanford and Dunedin, Florida, scarce. January 14 Nov. 1 ; 

 taken beneath bark of pine. Occurs in Atlantic States, from 

 Quebec to Florida and Texas; also in California. Food plant, 



