720 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 
rows; tin" upper pari <>t" the apical deohvity moderately depressed io the middle, 
producing s Blight concavity in its outline irhen viewed from above anteriorly, the 
Butnre n<»t elevated in this depression, but Bhowing a slightly impressed line along 
each side; the hind end bearded with hairs similar to those npon the front. Under 
Bide black, the Kegs and antennae i>;il»' dull yellow. (Fitch.) 
We have found this beetle in the pine woods of Maine; it was kindly 
identified for us by Dr. Le Oonte. It bores deep into the sap-wood of 
FlfMM strolrts in long nearly straight burrows ; the beetles may be found 
in them in March, their heads pointing towards the center of the tree. 
46. (inathotrichua aaperulna LeC. 
Mr. Sohwarz remarks that this beetle is perhaps not rare, but not 
easily recognized. " It bears a close resemblance to the smaller and 
rubbed specimens of Pityophthonts minutissimus, from which it differs 
mainly by the vestiture of the autennal stub. I beat two specimens 
from Pinus inops near Washington in May. In this tree it will prob- 
ably be found boring in the same manner as G. materarius. Le Conte 
gives its length as 1.5 mm (.06 inch.) " 
Mr. W. H. Harrington states that about the middle of May pine sap- 
lings may often be seen with drops of balsam oozing out of the bark and 
standing like beads of amber all over the trunk and limbs. Each of these 
drops show where one of these minute beetles has perforated the bark. 
On examination, many will be found still in their tiny burrows beneath 
the bark, usually in groups of three or four, and others will be found 
boring their way through the bark to deposit eggs. 
47. Pityophthorus 8parsu8 LeConte. 
The late Dr. Le Conte wrote on October 13, 1881, as follows regard- 
ing this, beetle: 
The species found by Blauchard (to me No. 36) under white pine bark is P. aparsua 
and is easily known by the prothorax having a smooth spot each side behind the 
middle, and by the very shining luster. The elytra are feebly and sparsely punct- 
ured, the declivity is deeply sulcate near the suture, and on the outer limit of the 
groove are two or three acute cusps. This species is depredated on by Hypophlaus 
ttnuits. 
48. Xyleborus 8parau8 LeConte. 
A number of beetles from the bark of a dead white pine (Pinus 
strobus) received from the Peabody Academy, Salem, Mass., were re- 
ferred to this species by Dr. Horn. 
41). The spruce timber beetle. 
Xylottrua bivittatua Mannheim. 
(Larva and papa, Plato XXIV, lige. 1, 1°.) 
This insect, though common under the bark of the white pine in 
Maine, is especially destructive to the spruce and fir, and for a further 
account the reader is referred to spruce insects. 
