558 FIFTH REPORT OF THE ENrOMOLOGICAL 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. 



Beetle. — Black, with short gray hairs ; a 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 ; antennae 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 bands, in each of which are two 

 spots on each side; the second band is on the middle ; near the tip 

 are one or two common spots ; tip entire. Length nearly half an 

 inch. (Say.) 



Fig. iil.—Xylotre- 

 chus annosus. — 

 Smith del. 



'2. Pogonocherua mixtua Haldeman. 



That this longicorn bores in the willow has been ob- 

 served by Mr. F. B. CaulGeld (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 pojition could with difficulty be distinguished from 

 the withered buds. I observed several pairs in coitu, but none of the females were 

 ovipositing. T ley appeared to be very sluggish, lying almost motionless, although 

 the sun was shiuing 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"^™ in length; prothoracic segment 3""" wide. 

 A pair of prothoracic spiracles and the usual eight pairs of abdominal 

 ones. Antennoe 4-jointed ; labrum as long as broad; maxillse 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. 



