558 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 
for the stove, he found it to be infested with the larvae of some species 
of longicorn beetle, and placing some of the sticks in one of his breed- 
ing cages, where it remained undisturbed until the 7th of May following, 
he found that nearly all the grubs had assumed the pupa state ; two 
weeks later none but perfect beetles were found. From 
this he inferred that this species requires only one year 
to complete its transformations. 
JUTtle. — Black, with short gray hairs: i triangular carina between 
the eyes. Body black, covered with short, gray, prostrate hairs; 
head with a grooved prominence between the eyes, terminating in 
a short carina; antenna- but little longer than the thorax: the 
latter with a naked dorsal stripe; elytra with the hair more densely 
arranged in some parts, so as to exhibit the appearance of small 
spots, which are arranged in two bauds, in each of which are two 
spots on each side; the second band is ou the middle : near the tip 
are one or two common spots; tip entire. Leugth nearly half an 
inch. (Say.) 
Fig. 187.— Xylotre- 
chus annosus. — 
Smith del. 
2. Pogonocheni8 mixtus Haldeman. 
That this longicorn bores in the willow has been ob- 
served by Mr. F. B. Caulfleld (Can. Ent, xiii, 1881, p. 60), as will be 
seen by the following extract : 
In June, 1873, while collecting in a small swamp on Montreal Mountain, I caught 
a specimen of Pogonocherus mixtus Hald. on my coat-sleeve, and as the insect was 
new to me, I commenced a search for others. Upon examining a dead branch of a 
small willow growing close by, I found that it had been extensively bored by some 
small insect. The part attacked was about three feet from the trunk, and at this 
place the branch for about 12 inches was full of holes, from which the insects 
had escaped. Not finding them, I searched further along the branch, and near its 
extremity, where it was reduced to the thickness of a twig, I found a number of the 
above-named species. They were lying on the branch with their bodies pressed 
closely against it, and in this position could with difficulty be distinguished from 
the withered buds. I observed several pairs in coitu, but none of the females were 
ovipositing. T iey appeared to be very sluggish, lying almost motionless, although 
the sun was shining brightly. Having bottled all that were to be seen, I cut off the 
branch where it had been perforated, and found a number of the beetles in it, but 
neither larva nor pupa. 
3. Saperda on the willow. 
Plates XXI, Fig. 4; XXII, Fig. 4, represent a larva found by Dr. Wat- 
son in the willow. It is 16 mm in length; prothoracic segment 3 mm wide. 
A pair of prothoracic spiracles and the usual eight pairs of abdominal 
ones. Antennae 4-jointed ; labrum as long as broad; maxillae with 
the lobe very large, extending far beyond the palpi, which are small 
and 3-jointed. Labium broad and short ; palpi short, 3 jointed. Man- 
dibles rounded at tip. 
