RHYNCHOLUS SP. 199 
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parallel, and more. or less cylindrical, thickening to a certain 
extent posteriorly, Rostrum, head, prothorax, and body above 
and below thickly punctured, the punctures being lighter on 
dorsal surface of head. Elytra channelled by longitudinal, deep, 
striz, and punctured. Length gynd to 4th inch. (See Pl. X, 
fig. 1, a.) | ; 
Life History. 
This beetle is a wood-borer, and appears on the wing in the 
spring about the second week in May, from which date it may 
be found till the end of June in considerable quantities boring 
into the wood of blue pine and spruce to lay its eggs. I am 
of opinion that the beetles found during these six weeks are 
those of one and the same generation, which is probably the 
first one of the year. I am at present unable to say whether 
_ there is another generation, or more than one, ata later period 
inthe year. The beetles of the May-June generation attack the 
- trees in swarms, and may be found at this period either in or 
beneath the bark, or on or in the sapwood, They bore either 
horizontally or at an angle into the dead bark of the standing 
tree, and, on reaching the sapwood, either continue their burrow 
into it or more usually move about for a time between the saps 
wood and bark cutting a long groove in the latter before going 
into the wood. Having selected a suitable spot, they then bore 
into the sapwood usually atan angle. This tunnel is carried for 
about 1 inch or less into the wood, and the insect then turns 
and burrows up the long axis of the tree for as much asa couple 
of inches. The eggs appear to be laid at the end of this long 
gallery. The latter is not always straight, but may bend yet 
again and go further into the solid wood. PI. X, fig. 1, b (1) shows 
a curved boring of this beetle. 
Ihave not yet found larva, and am not at present aware 
how they feed, 
Localities from which reported. 
The insect was first found in 1901 in dead blue pine at 
Kathian, Jaunsar Division, North-West Himalayas. The follow- 
ing year it was found plentifully in blue pine and spruce at 
elevations of between 5,500 and 7,500 feet in the same division, 
P 
