INSECT ENEMIES OF WESTERN FORESTS 191 



Jeffrey pine in California. Other common western species of 

 Chrysobothris include : 



Species Hosts and distribution 



breviloba Fall Ponderosa, pinyon, limber, and lodgepole pine, 



and Douglas-fir. Rocky Mountain region. 

 carinipennis Lee Douglas-fir, probably also pines and larch. 



Rocky Mountain region. 

 caurina Horn Ponderosa, sugar, and Jeffrey pine, and other 



conifers. Western States. 



dentipes (Germ.) Pines. North America. 



dolata (Horn) Ponderosa pine, fir, and Douglas-fir. Pacific 



coast and Idaho. 



falli V. D Lodgepole pine. California and Oregon. 



ignicollis Horn Juniper and cypress. Rocky Mountain region 



and Southwest. 

 monticola Fall Pines. Pacific coast and northern Rocky Moun- 

 tain region. 



octocola Lee Mesquite. Southwest. 



pseudotsugae Van D Firs and Douglas-fir. California, Oregon, and 



Idaho. 

 semisculpta Lee Ponderosa, Jeffrey, and sugar pine. Pacific 



Coast States. 

 sylvania Fall Douglas-fir. California, Oregon, and British 



Columbia. 

 texana (Lee.) Juniper and cypress. Southwest, California, 



Utah, and Colorado. 



Other western genera of wood-boring buprestids that may cause 

 damage of some economic importance are listed below: 



Genus Hosts 



Acmaeodera About 18 species in various broadleaved trees 



and shrubs. 

 Poecilonota About 5 species which breed in willows, poplars, 



cottonwoods, and alder. 

 Polycesta Four or more species in broadleaved trees and 



shrubs. 

 (See also bark-, twig-, or cone-boring buprestids, pp. 23, 46, 169.) 



ROUNDHEADED WOOD BORERS 



The roundheaded borers or long-horned beetles (Cerambycidae) 

 (33) have been previously discussed (p. 173) under the section 

 Miners in the Inner Bark and Phloem. The western members 

 of tfrfe family, however, are much more important from the 

 standpoint of damage to forest products than in the role of killers 

 of living trees. Most of the species are typically cambium-wood 

 insects, in that the larvae first mine in the cambium region of 

 dying or dead trees and then extend their tunnels into the sapwood 

 and in some cases into the heartwood. The large, broadly oval 

 worm holes are a serious defect in lumber, and if these are numer- 

 ous the wood becomes worthless for lumber purposes. Dying or 

 dead trees, those killed by insects or fire, or trees felled in cutting 



