9^ Natural History Bulletin. 



with in the field. I took it at two localities during my recent 

 trip— two specimens at Peach Springs, Arizona," and about 

 sixty at The Needles just inside the boundary of Southern Cal- 

 ifornia. The first one I took on the wing, the next under the 

 bark of a rotten pine log, while the remainder were found 

 in and about a thicket of willows on the banks of the Colora- 

 do river. They particularly affect trees that are somewhat 

 bushy m their growth and at times from three to five of them 

 may be seen resting on the same tree, usually near the top, 

 but occasionally quite close to the ground. Any ordinary 

 shake, such as it is possible to give a tree of from three to five 

 inches in diameter will not dislodge them, therefore it is neces- 

 sary to climb up and pick them off by hand. Great care 

 must be exercised or the beetle will "snap" itself off the Hmb, 

 and, catching hold of a twig in its fall, take flight. Should it 

 fall to the ground it is almost impossible to find it unless the 

 exact spot is noted, on account of dense undergrowth, and 

 dead leaves. 



Both sexes may be found in the trees during the latter half 

 of the day. I have seen them flying as early as ii o'clock a. 

 M„ and as late as 6 o'clock p. m. Their flight is rather heavy 

 and slow, usually about six to eight feet above the ground. 

 They may easily be captured with a net when flying, provid- 

 ing that they are in a spot where the undergrowth is not too 

 thick to allow of chasing them. 



I took the first specimen on the last day of July and contin- 

 ued to find them as late as the 24th of August, when I left 

 that vicinity. I could find no signs of the larvae anywhere 

 though I searched for them carefully. There is but little de 

 caying wood at The Needles and they mav possiblv feed on 

 the roots of the willow trees. Notwithstanding the' fact that 

 I found a dead male under the bark of a pine, this cannot be 

 the usual fcod-plant of this species, as no pine grows anvwhere 

 in the vicinity where C. zvehbii was most abundant "'l took 

 two specimens of Mallodon and one of PoIyphyHa cavifrons in 

 the same thicket. 



