70 THE SCOLYTID BEETLES. 



Section al. 



Length 3 to 5 mrn., brownish, to nearly black; elytral rugosities fine, densely placed, 

 the ^striae obscure and but slightly or not at all impressed. California, Oregon, 



Washington, and Idaho, in Pinus 1. brevicomis Lee., page 81. 



Length 2.5 to 4.7 mm., brownish to black; elytral striae moderately to distinctly 

 impressed ; interspacial rugosities moderately coarse and obtuse to coarse and acute. 

 Arizona, New Mexico, southern Colorado, southern Utah, and southern California. 



2. barberi n. sp., page 85. 

 Section a%. 



Head without frontal tubercles or groove, but with posterior impression. 



Subsection bl, page 70. 



Head with more or less prominent frontal tubercles each side of a distinct median 

 groove Subsection b2, page 70. 



Subsection bl. 



Length 4 to 6 mm.; reddish-brown to black, shining; body slender; elytral rugosities 

 moderately coarse but not densely placed, except toward base, the striae faintly 

 impressed, with rather coarse indistinct punctures; pronotum with long, erect 

 hairs on the entire lateral area; declivity shining. Arizona, New Mexico, south- 

 ern Colorado, and southern Utah, in Pinus 3. convexifrons n. sp., page 87. 



Subsection b2. 



Elytral striae distinctly punctured Series cl, page 70. 



Elytral striae not distinctly punctured Series c2, page 70. 



Series cl. 



Length 2.5 to 4 mm.; brownish to black; elytral rugosities obtuse, moderately coarse, 

 not very densely placed, and but moderately coarser toward the base and vertex 

 than elsewhere; pronotum usually with a few long hairs on the anterior section 

 of the lateral area. Pennsylvania to Florida, westward to Ohio and Texas, in 

 Pinus and Picea 4. frontqlis Zimm., page 90. 



Length 4 to 5 mm.; brownish to black; elytral rugosities subacute, moderately coarse 

 and distinctly coarser toward the base and vertex; pronotum with long erect hairs 

 on the anterior half of the lateral areas; elytra with long hairs confined to declivity 

 and posterior areas. Central Arizona, in Pinus 5. arizonicus n. sp., page 95. 



Series c2. 

 Striae distinctly impressed. 



Length 3 to 4.5 mm.; brownish to black; elytral rugosities distinctly coarser 

 toward the base and vertex, and with an evident row of acute rugosities on the 

 first interspace; pronotum clothed with stout reclining hairs and the entire 

 lateral area with long, erect hairs; elytral striae moderately distinct. Southern 



Mexico, in Pinus 6. mexicanus Hopk., page 97. 



Striae not distinctly impressed. 



Length 5 to 6 mm.; black; elytral rugosities obtuse, rather densely *placed, mod- 

 erately coarse toward dorsal suture, fine and less evident toward side; striae 

 obscure, especially on the side; pronotum distinctly pubescent, with very long 

 erect hairs on the entire lateral area; punctures moderately coarse. Southern 



Mexico, in Pinus 7. parallelocollis Chap. , page 99. 



Length 4 to 7.4 mm.; black; elytral rugosities rather coarse and sparse; the striae 

 toward the side rather distinct; pronotum moderately pubescent, with long, 

 hairs on the anterior two-thirds of the lateral area; punctures usually fine. 

 Arizona, New Mexico, southern Colorado, and Utah, in Pinus. 



8. approxi f matus Dietz, page 101. 



