108 INSECTS INJURIOUS TO FOREST AND SHADE TREES. 
5. THE PEACH AND CHERRY FLAT-HEADED BORER. 
Dicerca divaricata Say. 
Order COLEOPTERA; family BUPRESTID.S. 
Boring in red maple stumps a flat-headed borer whose prothoracic segment is not so 
wide in proportion to the two following segments as in Chrysobothris larvie. 
Although Fitch says that the beech is undoubtedly the original resi- 
dence of this borer, now destructive to cherry and peach trees, and 
that ‘‘wherever a dead tree of this kind occurs some of these beetles 
will almost always be found upon it on sunny days in midsummer,” we 
have found several of the fully and half-grown larve, with the dead 
beetle, in a partly rotten stump of the swamp maple at Providence, 
June 1. The hole for the exit of the beetle is oval cylindrical, 8™™ in 
its longer diameter and 4"™ in its shorter. The following description of 
the larva was drawn up from the larger specimens; that of the beetle 
is quoted from Harris: 
Larva.—Prothoracie segment moderately broad, not so long as wide, but not so wide 
in proportion to the two succeeding segments as in Chrysobothris; the second thoracic 
segment trapezoidal, narrower than the first by two-thirds of its length ; third thoracic 
segment a little narrower and a little longer than the second. All the abdominal seg- 
ments about two-thirds as wide as the third thoracic, and round and thick. The ter- 
minal segment a little over one-half as wide as the one before it. Prothoracic seg- 
ment with a large broad rough chitinous surface, with an inverted narrow Y with 
long slender arms to the Y. On the under side of the segment the rough surface is 
divided into two by two nearly parallel, longitudinal smooth lines. Length of body, 
35™™; length of prothoracic segment, 5™™; breadth, 7™™; width of metathoracic seg- 
ment, 5™™; width of an average abdominal segment, 4™™. 
The beetle.-—Wing-covers much elongated and spreading widely apart at the end; 
the insect copper-colored, thickly covered with liftle punctures; the prothorax slightly 
furrowed in the middle; the wing-covers marked with numerous fine irregular im- 
pressed lines and small oblong square elevated black spots; middle of the breast fur- 
rowed ; the male with a little tooth on the under side of the shanks of the middle pair 
of legs. Length, 18mm_93mm_ 
6. THE QUERCITRON BARK BORER. 
Graphisurus fasciatus (De Geer). 
Order COLEOPTERA; family CERAMBYCID-%. 
This beetle, more commonly found on the oak, has been found in the 
pupa as well as adult stage under the bark of the sugar maple in North- 
ern New York by Mr. George Hunt; and we have reared the beetle 
from a pupa found under the bark of the red or swamp maple, at Provi- 
dence, June 1. The cell made by the larva for the repose of the pupa 
is about an inch long, one-third of an inch wide, and one tenth deep. 
(See, also, p. 22.) 
7. Xyloterus politus Say. 
Order COLEOPTERA ; family SCOLYTID®. 
In this species, according to Leconte, the elytra have ill-defined dis- 
tant rows of punctures, with interspaces equally strongly punctured, 
