344 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 
dost-. s«*t fine hairs. The hairs on the sides of the prothorsz inclose a conspicuous 
black spot, while the top is hlaek, and more coarsely punctate than the wing-covers. 
The latter air each crossed by four acutely zigzag lines, composed of microscopic hairs, 
forming W-like bands on the elytra, tin- basal lines being less distinctly marked 
than the others. The ends of the wing-covers are also tipped with gray, especially 
on the inner side of the eud. The legs are pitchy brown with light hairs, and with 
a reddish tinge on the terminal joints (tarsi). It is a little over half an inch long. 
3. The noble clytus BORER. 
CalloidtH nobili8 (Say). 
A longicorn borer, probably depredating upon the chestnut, and transforming to a 
large, handsome, black-brown beetle, nearly an inch long, marked with three broken 
yellow lines and a pair of large round yellow dots on the wing-covers. 
Mr. George Hunt iuforms us that he has found this noble Clytus 
under the bark of the chestnut at Providence ; hence it occurs as a 
borer of this tree. Its food-tree has not heretofore been known. 
4. The two-toothed silvan us. 
Silvanus bidentatus (Fabricius). 
Order Coleoptera ; family Atomariid.e. 
Under the bark ot logs and decaying trees, probably loosening the bark from the 
wood, a minute, narrow, flattened beetle, of a light chestnut brown or rust-color, its 
thorax longer than wide, slightly narrowed towards its base and with a small tooth 
projecting outwards at each of its anterior angles. Length, .10 to .12 inch. (Fitch.) 
Fitch observes that this is an European insect, which, like a kin- 
dred species, the Surinam Silvanus, has now become perfectly nat- 
uralized and as common throughout the United States as it is in its 
native haunts. On stripping the bark from recently cut logs of 
chestnut and of oak, this minute beetle, which is so flattened and thin 
that it can creep into the slightest crevices, will be found frequently 
in considerable numbers. 
The beetle.— f he head and thorax often of a darker shade than the wing-covers ; the 
latter with rows of close punctures with a slightly elevated line between each alter- 
nate row. Its thorax also is densely and confluently punctured, and commonly shows 
a very faint elevated longitudinal line in its center. The angles at its base on each 
side are obtuse, and from these angles forward to the projecting tooth the lateral 
edges are crenate-dentate, having sixteen little elevated tubercles or minute teeth 
jutting out at equal distances along the margiu. The point of the large anterior tooth 
forms a right angle. Upon each side of the head behind the eye is also a minute 
tooth of the same size with those along the sides of the thorax. The surface is- 
slightly clothed with minute inclined bristles. (Fitch.) 
AFFECTING THE LEAVES. 
5. The notched-winged geometer moth. 
Eugonia alniaria Hiibner. 
Order Lepidoptkra ; family Phal.enid.e. 
Feeding on the chestnut, a bluish-green caterpillar, with wrinkles, and on the 
eleventh segment two little warts tipped with browu; transforming to a light ocher- 
yellow moth with wings deeply notched. 
