24 INSECTS INJURIOUS TO FOREST AND SHADE TREES. 
dle of its anterior side, and opposite to this on its hind side a large angular projection 
extending backward. Immediately back of this band is an irregular spot of a 
paler black color, which is sometimes confluent with the band; and there is also a 
small blackish spot on the outer side of the tips. The tips are cut off, sometimes 
transversely in a straight line, but usually concavely, and sometimes presenting a 
slight tooth-like projection on each side. The legs are ash-gray, the thighs with two 
black spots on their upper side, and the shanks with a black band at their base and 
another at their tip, these bands being more broad on the hind pair. 
On elevating the loose bark of fallen trees the fore part of June, these insects wily 
be found therein, lying in the cavities already mentioned, some of them being still in 
their pupa state, whilst others are changed to their perfect form, ready with the stout 
Jaws and sharp teeth with which they are furnished to gnaw their way through the 
bark and come abroad. 
This species occurs throughout the United States and Canada. Different specimens 
of it, however, vary greatly in their aspect. Even when newly born, among the in- 
dividuals in the bark of the same tree, considerable diversities in size and markings 
may be noticed. And the beetles found in this situation have their colors so much 
brighter and their spots and bands so much more distinct and clearly defined, that I 
supposed them to be a different species from fasciatus for several years, and until spec- 
imens came to hand showing a gradual transition from these to the older individuals 
which we usually capture abroad, and meet with preserved in cabinets, in which the 
colors have become faded and dim and the marks obscure and partially obliterated. 
In the shape of some of its parts, also, different specimens are liable to vary. (Fitch.) 
9. THE Oak LEIOPUS. 
Leiopus querci (Fitch. ) 
Order COLEOPTERA; family CERAMBYCID 2. 
A very small, long-horned beetle, which I am unable to refer to any of the de- 
scribed species, I am assured lives at the expense of the red and white oak, from 
meeting with it upon those trees standing apart from others in fields. As the larve of 
kindred species burrow in the bark of trees, this will probably be found in the same 
situation in oaks. The beetle is met with upon the leaves of these trees early in July. 
It is very closely related to the Facetious Leiopus. 
It is 0.20 inch long, and black, with ash-gray wing-covers, which are punctured and 
marked with a large black spot on the base of their suture in the form of a cross, and 
a broad black band slightly back of their middle, which is angulated, somewhat re- 
sembling an inverted letter W, this band often having a small ash-gray spot placed 
in it near its outer ends. Forward of this band are two black dots or short lines on 
each wing-cover, and sometimes a third dot back of it. There is also a dusky spot» 
usually on the tips of the wing-covers, and their deflected outer margin is black, The 
wing-covers are rounded at their tips. The thorax sometimes shows three faint gray 
stripes above. It is narrowed anteriorly, and on each side slightly forward of the 
base is a short, broad, sharp-pointed spine, from the tip of which, forward, the sides 
are straight. The long, thread-like antenn are dull yellow, with a slight duskiness 
at the end of each joint. The legs are blackish, with the bases of the thighs, and 
frequently of the shanks also, pale dull yellow, the hind thighs being less thickened 
towards their tips than the four forward ones. (Fitch.) 
10. Tork THUNDERBOLT BEETLE. 
Arhopalus fulminans (Fabr.). 
Order COLEOPTERA; family CERAMBYCID2. 
Excavating a burrow in the soft sap-wood, about three inches long and 0.20 inch 
in diameter, a worm like the apple-tree borer, which changes to a long-horned beetle: 
This beetle is said by Fitch to infest the oak, excavating a burrow in 
