72 THE SCOLYTID BEETLES. 



Length 6 mm.; elytra reddish; pronotum darker; elytral striae moderately im- 

 pressed, punctures of striae of dorsal area small, obscure, and those of the lateral 

 area moderately coarse; interspaces flat, with rugosities moderately coarse, obtuse, 

 and rather densely placed; pronotum with punctures more regular in size than 

 usual. Alaska 16. borealis n. sp., page 133. 



Length 6 to 7 mm. ; black; elytral striae but faintly impressed; punctures rather coarse; 

 interspaces flat; rugosities moderately coarse, not dense, acute toward vertex; 

 pronotum with fine punctures, moderately dense, coarser toward sides. Pacific 

 coast, Oregon to Sitjca, in Picea sitchensis 17. obesus (Mann.), page 135. 



Subsection b4. 



Striae of declivity with fine punctures Series c3, page 72. 



Striae of declivity with coarse punctures Series c4, page 72. 



Series c3. 



Length 5 to 7.3 mm.; elytra red; pronotum brown to black; body rather stout; elytral 

 striae scarcely impressed, except on dorsal area; strial punctures moderately 

 coarse; rugosities of interspaces moderately coarse, acute, not dense; pronotal 

 punctures coarse, deep, moderately dense; elytral declivity with interspaces 

 moderately punctured. Lake Superior, in Pinus strobus. 



18. rufipennis (Kirby), page 138. 



Length 5.4 to 6.5mm.; elytra dark reddish; pronotum dark; body somewhat slender, 

 as compared with species 18; elytral striae moderately impressed; punctures 

 coarse, shallow; pronotal punctures coarse, not distinctly irregular and mod- 

 erately dense; elytral declivity with interspaces finely densely produced. 

 Yellowstone National Park and Keystone, Wyoming; Alberta, and British Colum- 

 bia, in Pinus 19. murrayanse, n. sp., page 140. 



Series c4- 



Length 6.5 mm.; brownish; elytral striae impressed; punctures coarse, interspaces 

 narrow and moderately coarse, acute, rugosities coarser toward the suture. 



New York to West Virginia, in Picea 20. punctatas Lee., page 142. 



Length 7 to 8 mm.; brownish; elytral striae not impressed on dorsal or lateral areas, 

 punctures moderately coarse, shallow; interspaces broad, flat, shining; rugosities 

 small, obtuse, sparse. Europe, etc., in Picea, Larix,? and Abies'? 



21. micans (Kug.), page 143. 

 SUBDIVISION D. 



Pronotum somewhat elongate, slightly narrower than elytra, moderately constricted 

 toward head, median and posterior dorsal areas without long hairs, but hairs pres- 

 ent on anterior and lateral areas; head broad, epistomal process usually broad, 

 concave, with sides strongly oblique; elytral rugosities variable, usually coarse. 

 Body black. 



Length 5 to 8 mm.; black; epistomal process moderately broad, with apical 

 angles usually tuberculate; pronotal punctures very coarse, regular, moderately 

 dense, scarcely decreasing in size toward base; elytra without long hairs toward 

 base. Long Island, New York, south to Florida, west to West Virginia and 



Texas, in Pinus 22. terebrans (Oliv.), page 147. 



Body reddish. 



Length 5.7 to 9 mm.; reddish, never black; epistomal process broad, with apical 

 angles obtuse, never tuberculate; pronotum with punctures smaller and denser 

 toward base; elytra with long hairs toward base. Eastern United States and 

 Canada, north of mountains of North Carolina, westward to Pacific coast, south 

 from British Columbia into Mexico, in Pinus and Picea. 



23. valens Lee., page 151. 



