150 MISC. PUBLICATION 2738, U. S. DEPT. OF AGRICULTURE 
Three other species of this genus are found in the Western States 
doing similar work in various cedarlike trees. 
Species of Trachykele ws Hosts and distribution 
EOD Ulenta aera eee Incense cedar, big tree, western red cedar, 
and related trees. California, Oregon, 
and Washington. 
TT RiMbOsSd2 Wallies eke ae ais Balsam firs and mountain hemlock. Cali- 
fornia, Oregon, Washington, and British 
Columbia. 
TP Snhartimant burkel-=3 2s es Sargent cypress. California. 
Below are listed other western species of wood-boring. buprestids 
that may cause damage of some economic importance: 
Species Hosts 
iPOCCILONOUG ‘Spp)=e2 2224-6 See About 5 species which breed in willows and 
poplars. 
Chrysobothris- spp eS aes About 26 species in both conifers and 
broadleaved trees. 
ACMOGCOGCrAASPD2 se eee About 18 species in various broadieaved 
trees and shrubs. 
Polycesita spp 232 e a eee Three species in broadleaved trees and 
shrubs. 
(Also see bark-, twig-, or cone-bearing buprestids, pp. 21, 35, 132.) 
THE ROUNDHEADED WOOD BORERS 
(Cerambycidae) 
The roundheaded borers or long-horned beetles (27) have been 
previously discussed (p. 184) under the section of miners of the inner 
bark and cambium region. The western members of this 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 wormholes are a serious defect 
in lumber, and if these are numerous the wood becomes worthless 
for lumber purposes. Dying or dead trees, those killed by insects 
or fire, or trees felled in cutting or by windstorms are most fre- 
quently selected for attack; and if such timber is not promptly 
removed from the woods, it may soon be completely ruined for 
commercial purposes. The salvage of fire-killed trees frequently 
depends upon the rapidity with which they can be removed from 
the danger of attack by these borers. Unpeeled logs left in the 
woods during certain seasons of the year are often seriously 
damaged. 
There is no way, in which these insects can be controlled in the 
woods, and there seems little likelihood that practical methods will 
be developed that will prevent attack on dead or dying trees or 
recently felled logs. As with other insects that attack unseasoned 
wood, about the only thing that can be done is to remove the logs 
from the woods as quickly as possible and place them in water or 
run them through the mill and kiln-drying process. A few of these 
insects, however, are of importance even after the lumber is placed 
in storage. 
