SPHROTRYPES SIWALIKENSIS, tt. sp. 391 
FFF 
to the beginning of May I have a complete record of the beetles’ 
‘life-history, The following are notes for 1901-02 :-— 
On September 22nd, 1901, larve in the tunnels were nearly 
‘full-grown, as evidenced by the length of the larval tunnels. 
“The mother beetles were still alive in the egg-galleries or in 
‘the entrance tunnel in bark. | 
- Pupz also present and one or two mature beetles, 
On October 4th beetles were issuing. 
On October 26th larve present in galleries and mature 
‘beetles. These are those of the fourth (or fifth) generation, 
About the middle of November mature beetles issued, 
December 16th.—Tunnels contain only full-grown larvae, 
_pupz and mature beetles. These were hibernating through the 
winter. The pupz in severe winters would probably get killed 
-off. 
Fanuary t&th, 1902.—Larve and mature beetles found hiber- 
nating in galleries. 
February 25th.—Mature beetles cut out from the bark of 
‘standing, living but stag-headed Sal trees. These beetles had 
-issued from the trees in which they had matured some time in 
November and then bored a short way into the thick bark of 
‘neighbouring Sal trees, and were hibernating through the winter 
in this position. 
March 15th—Mature beetles taken on wing. The insects 
had begun egg-laying. The winter and spring of;1goI-02 were 
-exceptionally dry and were thus entirely favourable to insect- 
life. 
April 16th.—Egg galleries of ¢ to 1 inch long with larval 
galleries of 1-1} ich long containing young larve. Dead 
beetles in entrance holes. In many instances these galleries had 
evidently been made by beetles which had hibernated in the bark, 
.as although externally the entrance hole was seen to be old and 
the entrance burrow also fora short way in, its continuation 
down into the bast was fresh as also were the egg and larval- 
-galleries. The larve in these galleries were, of course, those of 
the first generation of the year. 
