INSECT ENEMIES OF WESTERN FORESTS 47 



Species Hosts and distribution 



Anthaxia aeneogaster Cast.. Pines, true firs, cypress, redwood, oak, willow, 



and other forest and shade trees. Western 

 States. 

 Chrysobothris femorata 



(Oliv.) (21+) Alder, ash, aspen, oak, poplar, willow, maple, 



beech, and many other hardwoods. Through- 

 out the United States. 



mali Horn (24) Alder, ash, aspen, beech, maple, poplar, willow, 



and many other hardwoods. California; 

 throughout the Western States. 



nixa Horn California incense cedar, cypress, and juniper. 



California, Oregon, and Nevada. 



viridicyanea Horn Juniper and cedar. California, Nevada, and 



Oregon. 

 Chrysophana placida (Lee.) . Pines, true firs, Douglas-fir, hemlock, and wes- 

 tern redcedar. All Western States. 



The adult long-horned beetles of some species of the family 

 Cerambycidae girdle the limbs and twigs of various hardwoods 

 and thus prepare them for the feeding of the larvae. These round- 

 headed borers are very similar to flatheaded borers, except that 

 the body is usually thicker and has a horny plate only on the upper 

 surface of the first enlarged segment. The larvae feed under the 

 bark and through the deadwood of the killed twigs, forming 

 broadly oval tunnels, which are filled with boring dust. The beetles 

 that are most frequently involved in this type of damage are the 

 following : 



Species Hosts and distribution 



Methia juniperi Linsley .... Juniper. Southern California. 

 Oncideres rhodosticta Bates 



(100) Mesquite. Texas, New Mexico, and Arizona. 



quercus Skinner (100) . . . Oak. Southern Arizona. 

 Styloxus bicolor (Champlain 



and Knull) Juniper. Southern California, Arizona, and 



New Mexico. 



calif or nicus (Fall) Oak. California and Oregon. 



Other species of roundheaded borers that may be found in twigs 

 and branches of western forest trees include the following : 



Species Hosts and distribution 



Callidium calif ornicum Casey Juniper and California incense cedar. Califor- 

 nia, Nevada, Oregon, and Washington. 



juniperi Fisher Juniper. Arizona and New Mexico. 



pseudotsugae Fisher Douglas-fir. California and Oregon. 



senipervirens Linsley Redwood. California. 



sequarium Fisher Giant sequoia. California. 



vancouverense Van D Douglas-fir. Pacific coast. 



Lophopogonius crinitus 



(Lee.) Oak. Pacific Coast States. 



Xeoclytus muricatulus 



(Kby.) Douglas-fir, true fir, larch, spruce, and pines. 



Western States. 



Oberea ferrugiaea Csy Willow. Colorado. 



quadricallosa Lee Willow, Pacific Coast States. 



Oeme costata Lee Ponderosa and pinyon. Colorado and Arizona. 



Opsimus quadrilineatus 



(Mann.) Spruce, Douglas-fir, true firs, hemlock, and 



pine. Pacific coast — California to Alaska. 



