HYLESINUS (?) SP. 259 

Polygraphus major, MS., which it resembles in size though not 
in colour or habits. The beetle is polygamous and as many 
as eight egg-galleries (?), (e), give off from the central pairing 
chamber, (p), (see Pl. XVI, fig.3, 4(p), (Z)) though there may be 
only 5. [ am not, however, able to say whether each is made by 
a separate 2 although several of the galleries were found to 
contain each a beetle. Although the beetles appeared to be 
boring the egg-galleries, | have not as yet seen any eggs or 
larve, and do not know how or where the latter feed. When 
the beetle first appears and the number of generations in the 
year isunknown. The insects found would not unlikely be 
those of the first generation of the year engaged in laying the 
eggs of the second generation. The difference in the life 
history between this and the larger Polygraphus may be 
summed up as follows :— 
P, major was at the time only just maturing as a beetle 
(first generation) in the branches of the Blue Pine. 
It was numerous in the tree from which A7ylesinus 
sp. was obtained. 
P, major does not attack the main trunk of the tree, 
The tunnels (egg-galleries) of Hylescuus sp, differ 
entirely from those of the large Polygraphus. 
Locality from where reported. 
This beetle was found in Tehri-Garhwal (Jaunsar Division) 
in the North-West Himalayas in 1902. 
Relations to the Forest. 
Until more is known about the life history of this Hylesinus 
it is impossible to say what damage it does to the trees 
it infests. The chief point to be ascertained is, whether fresh 
bark is a necessity to the insect for egg-laying or not, When 
eggs or young larve have been discovered we shall be in a 
position to form a conclusion on the subject. 
Points tn the life history requiring further observation. 
1. How the beetle lays its eggs, the number laid, and the 
time passed in the egg stage. 
2, Length of time passed in the larval state and the 
food of the larva. 
