INSECT ENEMIES OF WESTERN FORESTS 149 
Species of Buprestis Hosts and distribution 
BRO CCLUMLC Ce ee Seer Dios OD. Jeffrey, lodgepole, and other pines. West- 
ern States. 
EPRCOMRECLG LON ss see Jeffrey pine and ponderosa pine. California, 
Oregon, Idaho, and Montana. 
Beiacvvuentirs Week sens so oes. Ponderosa pine and other pines and Douglas 
fir. California, Oregon, Washington, Idaho, 
and Arizona. 
B. maculativentris var. subornata 
Lee. Safe, asf iene eae Pines. Western States. 
BeeRUSCUCOTULTH SGU DV eee Douglas fir and balsam firs. Throughout the 
Western States. 
1B) TAGI UO ea CW 0 0 a es Douglas fir and ponderosa pine. All Western 
States. 
B. viridisuturalis N. and W____- Poplar, cottonwood, and white alder. Cali- 
fornia and Oregon. 
ECONTLCWECR SA ee ee Poplar and aspen. Throughout the United 
States. 
AO UO Stale Cente timc ek Se Oak and cottonwood. California, Oregon, 
Washington, and Colorado. 
The dicerca beetles, members of the genus Dicerca, are medium- 
sized, robust, roughly sculptured, metallic, wood-boring beetles of a 
dull bronze color, with the tips of the wing covers prolonged into 
narrow points. The larvae work under the bark and into the wood 
of various species of trees that are sickly, dying, or dead. Of the 10 
species recorded from the Western States, those most frequently 
found breeding in the wood of forest trees are the following: 
Species of Dicerca Hosts and distribution 
D. tenebrosa Kirby (fig. 73) —------. Pines, balsam firs, Douglas fir, and Engel- 
mann spruce. California, Oregon, and 
Eastern States. 
DaSCLUMlusaerotehees “oe Se en eo. Douglas fir, ponderosa pine, Jeffrey pine, 
and knobecone pine. New Mexico, Ari- 
zona, California, Oregon, and Washington. 
DuGEUSSIGONL IS mle Cee ee 2 Lodgepole pine and Douglas fir. California, 
Oregon, and Washington. 
IDS FN AOUOMO UGE \UN CE aS See aes ere Aspen, cottonwood, poplars, alder, and other 
broadleaved trees. All Western States. 
ID (CR, (CrOKe l= 32 ae ee ee Alder, madrofia, oak, sycamore, and other 
broadleaved trees and shrubs. Montana, 
Idaho, Washington, Oregon, and Cali- 
fornia. 
DD OVaGTIGOLOASAYS 2 = Sis ste Alder, birch, and other broadleaved trees. 
Colorado. 
The western cedar borer (7’rachykele blondeli Mars.) (14) (49a) 
mines in the sapwood and heartwood of living, injured, dying, or 
dead trees of western red cedar, cypress, and related species and is 
very destructive to trees used for poles, shingles, cooperage, ship- 
building, or other purposes where sound wood is required. The 
adults, which are roughly sculptured beetles about five-eighths of 
an inch,.in length, of a very beautiful, bright emerald green with 
a golden sheen, lay their eggs on the wood of scars on the trunk or 
ee of standing trees, and the flatheaded larvae mine about in 
the wood for a period of 2 or 3 years before reaching maturity. 
The newly formed beetles remain in the wood for about 6 months, 
from September to May, before they emerge and start a new genera- 
tion. There is no practical means of control under present. forest 
conditions. The variety 7. blondelt juniperit Burke is found in 
junipers in California. 
