386 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. . 
6. TlIE PEACH AND CHERRY FLAT-HEADED BORER. 
Dtoerea divaricate Say. 
Order COLBOPTRUA ; family Buprestid.i:. 
(Larva, PI. xvi, tig. 2.) 
Boring in red maple stumps, a flat-headed borer whose prothoraeic segment is not 
so wide in proportion to the two following segments as in Chrysobothris larva-. 
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 larvae, 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 ,m " 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. — Prothoraeic 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 segments about two-thirds 
as wide as the third thoracic, and round and thick. The termi- 
nal segment a little over one half as wide as the one before it. 
Prothoraeic segment with a large broad rough chitiuous surface, 
with an inverted narrow V with long slender arms to the V* 
On the underside of the segment the rough surface is divided 
into two by two nearly parallel longitudinal smooth lines. 
Length of body, 35 mm ; length of prothoraeic segment, 5 mm ; 
Fig. 143. -Dicerca breadth, ? mm ; width of metathoracic segment, 5 mm ; width 
divaricata. Marx del. P ■, , . , .„,„ 
of an average abdominal segment, 4 mm . 
The beetle. — Wing-covers much elongated and spreading widely apart at the end ; 
the i nsect copper-colored, thickly covered with little 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, 18 to 23 mni . 
In addition to the above description of the larva, the following 
characters may be given. The mouth-parts are as described in Chryso- 
bothris femorata, and a drawing could not well show the generic or 
specific differences between Chrysobothris femorata and D. divaricata as 
regards these parts. They are as described in C. femorata ; the labium 
is the same, but with the front edge perhaps a little less full and rounded. 
The maxillae are perhaps a little fuller. Antennae the same, the third 
joint minute and rounded. Un the whole, the antenna? and maxilla? are 
a little stouter, and slightly more developed than in C. femorata. The 
labrum is, however, less full and rounded on the front edge. On the 
mesothoracic segment is a transverse narrow chitiuous area, while that 
