PROC. ENT. SOC. WASH., VOL. 22, NO. 4, APRIL, 1920 75 



nica Lee., but if the heart is gone there will be no gibbsii. The 

 beetles of gibbsii transform in the spring and emerge before sum- 

 mer so that the chopping for them should be done during May 

 and June. So far as known the species confines itself to oak, in 

 California apparently to the black oak. It was described from 

 specimens collected in Washington State and there probably lives 

 in the Garry oak (Q. garryana), which is the only oak native to 

 that State. 



B. viridisuturalis Nicolay & Weiss. This apparently good 

 species only recently named has been mixed in many collections 

 with gibbsii. It lives in the wood of various species of cotton - 

 wood (Popidusfremontu, P. trichocarpa, P. deltoides) and the white 

 alder (Alnus rhonibifolid) . Messrs. F. B. Herbert and R. D. 

 Hartman, of the Forest Insect Laboratory, found the species 

 fairly common at an elevation of 800 ft. near Three Rivers, Tulare 

 County, on the road to the Sequoia National Park. Mr. Herbert 

 also obtained specimens at Red Bluff, Tehama County, at an 

 elevation of 300 ft. Like gibbsii this species appears to prefer 

 heart wood, especially the heartwood of dead trees. Pupation 

 and the transformation to the adult take place during the spring, 

 so that the collecting for live beetles should be done during May 

 and June. Specimens have been taken from southern Oregon to 

 Southern California. 



B. confluenta Say. This, one of the most beautiful as well as 

 rare species, is fairly common in the aspen (Populus tremuloides} 

 forests near Lake Tahoe, Calif., at elevations of 5700-7500 ft. 

 The beetles transform in the spring and may be chopped from 

 their cells in the wood of dead and down trees during June and 

 July. Specimens have been found in the aspen and cottonwood 

 (P. deltoides} in Utah and Colorado. 



Chrysophana Lee. 



C. placida Lee. This small woodborer, while rather rare in 

 collections, is common in many of the Rocky Mountain and Pacific 

 Slope forests. In El Dorado County, Calif., the beetles are found 

 at all elevations from 1500 to 7500 ft. and in practically all of 

 the coniferous trees except the cedar and juniper. The wood of 

 the lower suppressed limbs, scars and dead stubs produced many 

 specimens. Around the San Francisco Bay region and in southern 

 Oregon it is common in the hard woody cones of the knobcone 

 pine (Pinus attenuata). In Utah numerous specimens were cut 

 from the wood of the trunks of fire-killed fir (Abies concolor). As 

 the beetles transform in the 'fall they may be collected from the 

 wood or cones from the first of September until the first of June. 



