ECCOPTOPTERA SEXDENTATA. 285 

the branch above and thus provide a supply of dying wood for 
the larva to feed upon. The larva on hatching out bores up 
the branch mining out a fairly deep gallery in the sapwood. 
This gallery may be straight or may curve about but always 
goesup the branch. The wood consumed by the larva is passed 
out at its anal extremity and fills up the part of the gallery it has 
already gnawed out. When full fed, the grub enlarges the top of 
the tunnel formirg a pupal chamber and presumably pupates in 
this. Itis in this enlarged chamber at the head of the gallery 
that the beetles were obtained, in every case the gallery below 
the chamber being invariably blocked up with the wood excreta 
of the larva. There are no offshoots to the tunnel. In some cases 
I noticed that branches were ringed in several places at succes- 
sive nodes. In each case a gallery was present above the girdle. 
Whether this was the work of the same beetle or of different 
ones I was not able to determine. In none of the galleries from 
which beetles were obtained was any opening to be seen on the 
outside of the branch, the girdle and the dying or dead condi- 
tion of the branch being the only external evidence of the 
beetle’s work. Branches attacked in previous years showed, 
however, in the cases where the dead portion above the girdle 
had not already been knocked or dropped off, a small round hole 
of exit communicating with the outside from the pupal chamber, 
and it is evident that the beetle leaves the branch by boring 
horizontally through the bark. 
I am at present unable to state whether this beetle has 
more than one generation in the year. I found on the 5th July 
two newly-ringed branches, and it is probable that the beetle lays 
her eggs soon after issuing, about the middle of the month. 
Locality from which réported. 
This beetle was found in Silver Fir (Adies webdcana, Lindl.) 
in a forest near Baghi in the Bashahr State in the North-West 
Himalayas, at an elevation of about 8,000 feet. 
Relations to the Forest. 
The damage done is to the side branches of the silver fir. 
The beetle rings these at a point generally about two-thirds to 
