349 
A predaceous Enemy of the Wood-borers Rhyncholu 
sp. and Hylastes sp. 
NIPONIUS CANALICOLLIS, Lewis. 
Reference :—Lewis A. M. N. H., Ser. 7, Vol. viii, Nov. 1901. Steb. Dep. 
Not. Insec. aff. For. No. 2, p. 248. 
Classification:— Order, COLEOPTERA. Family, Histeride. 
Predaceous upon Rhyncholus sp.and Hylastes sp. in spruce. 
Already reported as predaceous uponthe Blue pine bark-borers 
Tomicus sp. and Polygraphus major and mtnor. 
(Vide No. 2 of these Notes, p. 248.) 
Description of Pupa. 
Pupa.—Longish, straight, white with a vertical head and 
free limbs, wings etc. Length 4 millim. 
Life-History. 
A further addition is here made to the. notes on the life- 
history of this Niponius, In the last number of these notes we 
saw thatit preyed upon Tomicus sp, and Polygraphus major 
and minor. The beetles had been found in the Blue pine chiefly, , 
but also in one instance in some deodar saplings where it was 
feeding upon P. major. 
I have now. found it preying upon the two wood-boring 
beetles Rhyncholus sp.,, and Hylastes sp., following them into 
their tunnels in the wood. It was taken in the middle of June 
in tunnels in a large dead spruce which was being riddled by the 
above-mentioned Scolytid borers, the former being especially 
plentiful. Since these two borers are usually found together it 
is probable, I think, that this Vipontus also attacks the Hylastes : 
but it may confine itself to the Rhyncholus beetles, which it 
resembles in build. I think there is no doubt that it follows 
these beetles, into the tree by entering byjtheir galleries, feed- 
ing upon them and laying eggs in such a position as will enable 
the young larva on hatching out to feed upon the Rhyncholus 
and Hylastes larve. 
Nitonius canalicollis has now been found in Blue pine, 
deodar and spruce wood. The insect either spends a long 
