78 THE SCOLYTID BEETLES. 



SUBDIVISION B. 



West of western Montana and southwestern Idaho, south through the Sierra Nevada 

 Mountains of California Species 9, page 105. 



Western South Dakota and southern Wyoming, southward through Utah, Colorado, 

 to southern Arizona and New Mexico Species 10, page 109. 



Northern California, southward in Sierra Nevada, into San Bernardino County, Cali- 

 fornia Species 11, page 114. 



DIVISION II. 

 SUBDIVISION C. 



Maine to western Michigan, southward into northwestern West Virginia. 



Species 12, page 117. 



Northern Idaho and Montana, south to southern Arizona and New Mexico, and north- 

 ern Washington, south into Santa Barbara County, California. Species 13, page 121 . 



Section 0,4. 



Maine to northeastern Minnesota, southward to central Pennsylvania. 



Species 14, page 126. 

 Northern Idaho, east to western South Dakota, southward to southern Arizona and 



New Mexico Species 15, page 130. 



Alaska Species 16, page 133. 



Alaska?, along the coast to northwestern California Species 17, page 135. 



Lake Superior region Species 18, page 138. 



Western Montana southeast to central Colorado Species 19, page 140. 



Higher mountains of New York, Pennsylvania, and West Virginia. Species 20, page 142. 

 Central Europe to Denmark, Russia, and eastward into Siberia. Species 21, page 143. 



SUBDIVISION D. 



Atlpntic States south of Massachusetts, to Tampa, Florida, westward to western West 

 Virginia and Texas Species 22, page 147. 



Mountains and foothills of North Carolina, northward into Maine and northwestern 

 Washington, southward into Guatemala Species 23, page 151 . 



Guatemala Species 24, page 157 . 



TABLE SHOWING RELATION OF SPECIES TO HOST TREES. 



DIVISION I. 



Section al . 



Species 1. Pinus lambertiana, ponderosa. 



Species 2. Pinus ponderosa var. scopulorum, edulis; Pseudotsuga faxifolia. 



Section at. 



Species 3. Pinus scopulorum. 

 Species 4. Pinus strobus, txda, rigida, rirginiana, pungens, echinata, glabra, palustris; 



Picea rubens and excelsa. 

 Species 5. Pinus scopulorum. 



Species 6. Pinus teocotlt, lejophilla, and ayacahuite^ 

 Species 7. Same as 6. 

 Species 8. Pinus arizonica, scopulorum. and chihuahuana. 



SUBDIVISION B. 



Species 9. Pinus monticola, lambertiana, ponderosa, murrayana; Picea engelmanm. 

 Species 10. Pinus flexilis and strobiformis. 

 Species 11. Pinus lambertiana and ponderosa. 



