New YorK AGRICULTURAL EXPERIMENT STATION. 205 
black in color, being made up of very fine splinters. The exu- 
dations thrown out from the heart wood are clean, usually 
white, and larger both in length and thickness. In opening the 
channels, a few splinters or chips can always be found; but 
when the larva is ready to pupate, the channel is packed for 
the full length, with the exception of the pupal chamber at the 
upper end. After filling the channel with chips and making 
the pupal chamber, the larva turns itself head downward, in 
which position the pupa will be found. 
DESCRIPTION: OF .THE ,PUPA. 
The pupa is about one-fourth of an inch long, being some- 
what stout and of a pale yellow color. The head, rostrum, and 
other parts of the body have a number of small tubercles, most 
of which bear curved brown hairs. The antennal case is nearly 
parallel with and slightly overlaps the femur of the foreleg. 
The wing cases are partly covered by the first two pairs of legs 
and in turn almost cover the third pair. The tip of the ab- 
domen is provided with a pair of short strong inward-curving 
hooks. , , 
THE LENGTH OF THE PUPAL STAGE. 
In the vicinity of Geneva, most of the larvae pupate some 
time during July, as is shown by the following observations. 
In an examination of some twenty larval channels, made July 8, 
one adult, two pupae and fifteen larvae were found. In another 
examination of some larval channels on July 12, four adults, 
four purpae and ten larvae were found. While there were many 
adults in the larval channels up to the latter date, none had 
emerged. The appearance of the trees on July 30 seemed to 
indicate that practically all of the beetles had emerged. ‘The 
pupal stage lasts from ten to sixteen days. In one instance, 
a larva ready to pupate was kept under observation. Pupation 
occurred during July 13 and the adult emerged July 27, the 
period being fourteen days. 
A DESCRIPTION OF THE BEETLE. 
The body of the beetle varies from one-third to three-eighths 
of an inch in length. The general color is a dull black, though 
the rear third of the wing covers, the basal half of the front 
thighs, and the ventral part of the prothorax, are covered with 
white scales. The other portions of the body are covered with 
