164 
A further note on the life history of 
SINOXYLON CRASSUM, 
LESNE. 
(See pp. 12-15 tn No. 1 of these Notes.) 
Trees attacked :— Shorea robusta (Sal); Terminalia tomen- 
tosa, Roxb, 
Description. 
The beetle varies greatly in size. Specimens taken in the 
Dehra Dun sal forests are as much as Sth of an inch (7°8 millim.) 
in length. 
Life History. 
This insect has been found boring into sAl shoots and seed- 
lings by students Littlewood and B. C. Gupta! The insect 
was found in the beetle stage in the third week in February, 
and examination showed me that it was egg-laying. It bores a 
large circular entrance hole into the wood and then mines 
up the shoot. The shoots infested were dead ones at the 
end of the branches of sal poles, and the beetles were plenti- 
ful. Student Littlewood made the following note: “The 
beetles were found in little bores in the dead upper part of young 
sil shoots ; almost every shoot was bored into, the entrance hole 
being usually above a node and the gallery proceeding down- 
wards. Beetles found in the Phandowalla sAl areas.” 
The beetle has not previously been reported as commencing 
the first egg-laying of the year before April. The fact that 
it begins work so much earlier in the year in the Dun forests 
and that itis of so much larger size would appear to be of 
some importance, and its life history in these forests requires 
working out. 
Owing to its large size, I was doubtful of its identity with 
S. crassum. Mr. Lesne, who settled this point for me, tells 
me that he has already had it reported as infesting the sAl, 
but does not mention from where the insect was sent. 
S. crassum was also found infesting the TZerminalia 
toméntosa last year in the Central Provinces, ° 
* Of the Imperial Forest School, Dehra Dun. 

