130 ENTOMOLOGICAL NEWS. [Mar., '17 



3. Dicerca sexulis Cr. 



This is one of the handsomest species of the genus and is 

 found throughout the northern part of the State. I have taken 

 it from Douglas fir, which seems to be its principal host plant ; 

 also from yellow pine. Dr. Van Dyke has taken it from 

 knobcone pine at McCloud, in June, 1914. I have taken speci- 

 mens emerging from Douglas fir on April 4, at an elevation of 

 3500 feet in the Santiam National Forest of Oregon. 



4. Dicerca tenebrosa Kirby. 



Of this species Dr. Van Dyke writes as follows : 

 Have found the western phase of this species about Fallen Leaf Lake, 

 Lake Tahoe, in July, 1915, on dead lodge pole pine, in which it no doubt 

 breeds. It probably extends south through the Cascade-Sierra range in 

 the lodge pole pine belt. 



I have never encountered this species in California, but in 

 the Blue Mountains of eastern Oregon it is the most common 

 member of the genus and breeds in both Pinus ponderosa and 

 P. contorta. Near Klamath Falls, Oregon, it was taken from 

 Abies concolor. 



5. Dicerca hornii Cr. 



This species breeds in Alnus and Ceanothns in most coun- 

 ties of northern California. It is quite common locally at cer- 

 tain periods. 



6. Dicerca pecterosa Lee. 



This rare species was taken by Dr. Van Dyke at Lake Tahoe 

 in July, 1915. In Oregon it breeds in peach, and I have taken 

 it on the lodge pole pine in Grant County, Oregon. 



7. Trachykele opulenta Fall. 



I quote from Dr. Van Dyke on the two species of this genus : 

 A number of brilliantly green specimens of Trachykele were beaten 

 from the alpine juniper on the ridge above Lake Tahoe, during July, 

 IQIS. by Ralph Hopping, E. P. Van D'uzee and myself. Many borings in 

 dead juniper limbs were also observed which were no doubt due to this 

 species. This species, I have generally been considering as Fall's opu- 

 lenta, though it may be true blond ell Mars, about which there has been 

 so much uncertainty. It is quite similar to other specimens which I 

 have from Seattle, Washington, where it no doubt lives on Thuja pli- 

 cata, from Shasta County, California, in the territory of Sargent cy- 

 press in Marin County. In the southern Sierras, this species is also 



