PINE BORERS. 701 
of Europe, the larva living in the trunks of pines, excavating a wavy 
shallow track under the bark, which is packed full of sawdust, and 
when almost fully grown sinking itself obliquely downwards several 
inches into the wood, to repose during its pupa state. 
Specimens occur in which the thorax is plainly narrower than the 
wing-covers, more distinctly puuctured, and destitute of the two im- 
pressed spots. These are the violet-colored Callidium, G.janthinum of 
Dr. Le Conte and of Dejeau's Catalogue. But individuals appear to 
occur of all intermediate varieties, and I am therefore inclined to think 
they can scarcely be regarded as constituting two distinct species. 
(Fitch.) 
We have observed this beetle in considerable numbers under pine 
boards, and also flying, at Brunswick, Me., in the middle of May. Mr. 
George Hunt h as observed it in pine trees at Providence, R. I. We found 
at Providence, May 14, a dozen or more individuals under the bark of a 
dead Juniperus virginiana. The track made by the larva, as we sup- 
posed it must have been of this insect, was irregularly wavy, like that 
of other longicorn grubs, and filled its castings compactly with a fine 
dust ; it was shallow and 4 or 5 inches long. Whether it was made 
before the death of the tree is unknown, but the work of this and its 
fellows had loosened the bark, several larvae having been at work 
together. 
Regarding the confusion existing between this beetle and Pseno- 
cerus supernotatus Dr. John Hamilton writes as follows (Can. Ent.) : 
Five times this has appeared on the lists of some of the more accurate of my cor- 
respondents, and as many times, instead, have I been sent Psenocerus supernotatus 
Say. I could scarcely account for this, and for the great demand for so common and 
so widely distributed an insect as P. supernotatus, till an appeal for the correctness 
of the determination pini was made to the Journal of the Acad. Nat. Sci., ser. 2, v. 
2, p. 158, the writer stating that Dr. Le Contfi had several years ago so named his 
insect. Reference to the place cited shows that Dr. Le Conte then regarded the Cal- 
lidium pini Oliv. and the Clytus supernotatus Say as one species, which he placed in 
the genus Psenocerus. Subsequent investigation proved that pini (which had been 
unknown in nature to Dr. Le Conte) was different from supernotatus, both as to spe- 
cies and genus. The error was corrected in the books, but it has given rise to a great 
mistake in the tradition of the insect. I have not yet seen pini, but from the descrip- 
tion of Dr. Le Conte (Smithsonian Misc. Coll., 1873, vol. vi, p. 202), it certainly 
resembles P. supernotatus. To distinguish them at a glance, it is only necessary to 
remember that the thorax of the former, instead of being pitted, is longitudinally 
rugose, and that there is on the elytra anterior to the middle a smooth, ivory white, 
obliquely transverse line which is wanting on the latter. E. pini seems rare. P. super- 
notatus is one of the few Cerambycids that occasionally hybernate. In February of 
the present year I found three in the folds of a Cecropia cocoon taken from some 
currant bushes. 
