240 INSECTS INJURIOUS TO FOREST AND SHADE TREES. 
17. THE PINE LEAF MINER. 
Gelechia pinifoliella Chambers. 
The leaves of the fir were found at Brunswick, Me., to be affected by this 
miner much as in the pitch pine (p. 208), the terminal third of the leaf 
being paler than the rest. A dead pupa skin was found July 15. 
18. THE FIR SCALE INSECT. 
Lecaniuwm. 
On the upper side of a fir leaf a single specimen of Lecanium was 
found at Brunswick, which was low, flat, broad oval, blackish, almost 
as broad as the leaf. 
19. THE PINE MITE. 
Order ARACHNIDA; suborder ACARINA. 
Quite prevalent on the fir, working at the base of the leaves at the 
ends of the twigs, in summer and early autumn, in Maine; little dark 
mites, with rounded bodies, and quite active in their movements, caus- 
ing the leaves of the fir especially to curl up, and to show the light under 
side. These little active mites spin a slight web in the axils at the end 
of the shoots. They are dark brown, with a yellowish head and thoracic 
region, while the legs and under side are of the same yellowish tint. ~ 
They were observed from the middle of July until the first of September 
at Brunswick, Me., and occurred on the white pine as well as the fir 
trees. 
INSECTS INJURIOUS TO THE HEMLOCK (Abies canadensis). 
1, THE CANADIAN LEPTURA. 
Leptura canadensis Fabricius. 
Order COLEOPTERA ; family CERAMBYCID®. 
Probably mining the trunk of the hemlock, a longicorn larva changing to a rather 
large handsome black beetle, with the black wing-cases deep red at the base, and an- 
tenn broadly ringed with reddish. 
Dr. Fitch refers to the remarkable immunity of the hemlock from the 
attack of insects, and our experience of twenty years corroborates his 
opinion. He states, however, that the porter Hylotrupes (H. bajulus 
Linn.) is reported to sometimes attack this fortunate tree, and that the 
larvee of the pine Hacles imperialis is said to occasionally feed on it, as 
well as a bug. 
Mr. George Hunt, of Providence, tells me that he has found the pupa 
of Leptura canadensis in the stumps of the hemlock in July in the Adi- 
rondacks, New York. The beetle is rather a large one and is black, the 
surface coarsely and densely punctured. It may readily be identified 
by the base of the wing-covers being deep red, while the antennz are 
broadly ringed with paler red, the joints in the middle being alter- 
nately red and black. It is three-quarters of an inch in length, and is 
