92 



THE REPORT OF THE 



No. 19 



First, then, there is the broad-necked Sawyer, (Prionus laticollis, Dru). 

 Fig. 13. I have not met with this in Quebec, but I have seen a specimen 

 that was taken near Sherbrooke. This fine beetle is two inches long, and 

 broad in proportion. Its larva feeds on the roots of the tree. 



Boring in the trunk is the carpenter worm — the larva of the fine moth 

 Prionoxystus rohiivioe, Peck. This caterpillar is nearly three inches long. 

 It has a livid, reddish body, and a glossy black head. It makes a tunnel 

 as large as the bore of a half-inch auger. When nearing perfection it 

 works its way to the surface of the wood, and prepares a way of exit for 

 the future moth. It then retires about three inches, and spins a cocoon, 

 in which it undergoes the pupal change. In due time the pupa breaks 

 from its cocoon, works its way to the opening made by the caterpillar, and 

 allows the moth to escape. The moth appears in June and July. This 

 species tunnels in the locust tree {Rohinia pseudacacia, L.,) as well as in 

 the oak, and from this it derives its specific name, rohiniae. 



■ Fig. 13. 



Mr. Albert F. Winn, of Westmount, P. Que., has found upon oak trees 

 on Mount Royal specimens of the fine moth, Prionoxystus Macmurtrei Guer- 

 in-Meneville. The larva of this species is known as "The Lesser Oak Car- 

 penter Worm." 



A great variety of beetle-grubs are miners in the oak, and are very 

 injurious to it, Buprestidce, CurcuHonidce, Cerumbycidce, Scolytidce, etc. 



The specimen I exhibit is Urograyhis fasciatus, De Geer, one of the 

 Cerambycidse. The species to which it belongs is found throughout the 

 United States and Canada. Notice the long ovipositor of the female in- 

 sect. With this she pierces the outer layers of the bark of the oak, that 

 she may deposit her eggs in the softer layers within. 



The larvae tunnel in the bark close to the white wood, and pack their 

 passageways so full of fine frass that it is hard to trace them. The beetles 

 appear early in June. The larvae and pupae should be looked for early 

 in the spring. 



It may have been to this beetle that the damage we noticed to the oaks 

 in the grounds of Mr. Wade at New Liverpool, two or three years ago, was 

 due. 



Another injurious beetle is Ithycerus noveboracensis, Forster. This is 

 the largest of our weevils or curculios. (Fig. 14c.). The female gnaws 

 a small opening in a branch of the oak, (Fig. 14a), and then deposits an 

 egg in it. The larva (Fig. 146.) burrows in the twigs. 



