168 Fort i- FIFTH Report on the State Museum. 



From perhaps a dozen of the burrowed twigs subsequently sent to 

 me by Mr. Rose in the spring after the girdling had been marked in 

 the preceding spring, a single exami)le of the perfect insect was 

 obtained. It had become moldy and was set aside for cleaning, after 

 an unsatisfactory comparison with the Fitch description had been 

 made, which seemed to indicate a different species. Unfortunately the 

 specimen has been mislaid and can not now be found. 



Nematus Erichsonii Hartig. 

 llie Larch iSaw-ffi/. 

 This insect is still continuing its ravages in the Adirondack Moun- 

 tains. On August 7, 1891, many of the larches observed from the road 



Fig. 23.— The larch saw fly, Nesiatus Erichsonii, in natural size and enlarged, and the larvae in 

 different stages in natural size. (After Packard.) 



in passing from the Wilmington Notch to the Mountain View House 

 in North Elba, in Essex county, were seen to be nearly or entirely 

 stripped of their leaves. Quite a number of dead larches were noticed 

 which it was thought had been killed by their annual defoliation for 

 a few years past — the attack having been observed by me in the Lake 

 Placid region in the summer of 1888. 



At this time the larvje had entirely left some of the tree.«, while on a 

 few they were still feeding in small numbers. 



