2962 INSECTS INJURIOUS TO FOREST AND SHADE TREES. 
In my trips to Ktaadn in 1879, 1880, and 1881, I did not see about the mountain, 
nor on the way to and from it, any increase of dead spruces above what I observed 
in my visits of 1869 and 1871. There are now, as in the earlier years, the usual pro- 
portion and no more of dead and bleached spruce trunks standing among the living, 
but none recently dead and retaining their bark. 
I camped in the Basin seven days in 1879, thirteen days in 1880, sixteen days in 
1881. The only borers I ever saw there—to know them—are Prionus wnicolor and 
Monohammus scutellatus. In 1879 I saw more of the former, but this year none of that, 
while the latter swarmed everywhere—but ten days later in the month. These two 
species I have known for years. Thinking that you might possibly find in a list of 
my unexamined species the new destroyer, I asked Dr. Hagen to prepare one. But 
though I have forgotten the name of this recent pest, you will not find it among the 
species collected by me. This fact and the other, that no unusual killing of spruces 
appears to have taken place lately in the Ktaadn region, indicate of course that 
the destroyer has not penetrated thither. 
I took insects only on the highest peak, hoping to get by chance something not 
found lower down, though aware that the season for characteristic Alpine species had 
long passed. But you will probably find in the list only species common at lower ele- 
vations. Their presence on the summits I suppose you will attribute, in part at least, 
to their being blown there by winds. My collection of wild black spiders may, on 
examination, prove different from low-ground species. Please note that this abun- 
dance of M. scutellatus occurs high above the growth of Pines, which are not found at 
all in the Basin. 
Yours, truly, 
C. E. HAMLIN. 
Insects taken on highest peak of Mt. Ktaadn, September, 1881. 
6 Monohammus scutellatus Say. 
1 Leptura canadensis. 
1 Buprestris maculiventris. 
1 Melanotus communis. 
1 Clerus dubius. 
Upis sp. ? 
2 Scymnus sp.? (very small). 
Atta pennsylvanica, 
