112 THE CANADIAN ENTOMOLOGIST. 



made on the general fascies. The length of the antennae is also of some 

 use, being longer in peregrinus, but the relative length of the first and 

 second joints is not permanent enough to be of value. Fulgidus is 

 taken more commonly in autumn in and about decomposing vegetable 

 matter. Peregrinus abounds all summer everywhere, and is quite 

 arboreal and predaceous. 



Dynastes tityus Lin. A gentleman sent me an immature living male 

 and female of this species. They were taken in Clairborne County, 

 Tennesee, early in December, from the decayed wood and humus that 

 filled the cavity of a large yellow poplar, at the cutting down of which he 

 was present. He writes, "there were a great many of them; they were 

 all encased in oblong cases about three to four inches long and three 

 inches in diameter, composed of the rotted wood in which they were 

 imbedded ; they were all soft and white ; none of the natives had ever 

 seen anything like them." Unfortunately he sent me none of the cases. 

 When received, about three weeks after being taken, the male was 

 assuming the greenish hue, and in three weeks more was normally 

 colored. The female was entirely brown, and in four weeks had 

 changed to nearly black ; the black then began to fade, and in about 

 four weeks more the beetle had taken on the greenish tint with the usual 

 brown maculae. No further change in color has occurred till the present, 

 April 6th. It may be possible that the brown males and females men- 

 tioned by writers are immature individuals, as it would appear from the 

 above that it requires from two to three months to perfect the colors. 

 While no real stridulating organs are present, they have the power to 

 produce a sound that may answer the same purpose, somewhat resembling 

 that of an angry goose. The pygidium and part of the last ventral 

 segment are very hairy, and by withdrawing the abdomen from the elytra 

 so as to admit air, and then suddenly forcing it out through the hair by a 

 sudden extension, a noise is produced that is rather alarming to one 

 unacquainted with their harmlessness. 



Prionus imbricorjiis Lin. Nov. 15th, 1884, I found a larva that in 

 time produced this beetle. As it measured over three inches in length 

 when at rest, it must have been nearly full grown ; the skin was luteous 

 and of a tough leathery consistence. It was about ten inches below the 

 surface of the ground at the side of a large stone which it had struck in 

 its subterraneous travels. The stone and the larva were carefully replaced 



