204 A FURTHER NOTE ON SCOLYTUS MAFOR, MS. 

galleries, c c...the enlarged pupating chamber in the wood at 
the end of the larval tunnel. 
The pupa is white and has the ordinary beetle form, the legs, 
antennze, and wings being free and folded close on the breast. 
The beetle does not die when it has finished egg-laying, 
but is to be found in the egg gallery or entrance hole until the 
larvee are full grown (in the case of the first generation). I have 
not yet ascertained how long after this period it remains alive. 
When the mother beetles die, they do so in the entrance holes, 
the posterior end of the abdomen protruding from, or being 
close to, the exterior opening of the entrance hole. In this way 
predaceous insects are prevented from entering the egg gallery 
which, together with the entrance hole, is kept quite free of 
wood dust. 
The young beetles on maturing bore a horizontal tunnel to 
the outside of the tree and escape. 
Relations to the Forest. 
The further study I have been able to make on the life his- 
tory of this beetle has shown that it is a most dangerous pest, 
since it will attack the largest deodar trees. It evidently prefers 
freshly-felled timber, failing which it attacks sickly trees and on 
occasions, undoubtedly, green saplings. The point to draw 
attention to here, however, is its preference for fres’aly-felled 
trees. Insome deodar fellings inspected towards the end of June 
(1902) the cut trees lying on the ground still unconverted were 
covered, in the instances examined, from top to base between the 
bark and wood with galleries of this and the smaller Scolytus 
containing mature larvee, the mother beetles being in most cases 
still alive. (Plate XI shows a portion of a pole attacked in 
this way). The trees had been felled at the end of April and 
beginning of May just about the time the beetles of the last 
generation of last year (1901) were issuing to lay the eggs of the 
first generation of the present one. These eggs were deposited 
in the bark of the felled timber in bole, top, and large branches, 
From measurements taken at the time I have made the following 
calculation :— 
_ The cut portion of a tree measured had a diameter of 3 feet 
at base, 10 inches at top (a length of 16 feet had broken off 
