20 
Indian Forest Becords. 
[ VoL. II. 
DistribuHoa. 
Naini Tal Oak Forests, N.-W. Himalaya (as at present known). 
Description. 
Larva . — Small white oval. Very convex above and much corrugated 
and channelled (PI. VI, fig. 1). 
Beetle. — Short, oval, very convex. Black with antennae slightly 
lighter and tarsi ferruginous. 
Head punctate, more strongly so at sides, hairy at vertex. Prothorax 
1 ^ times as broad as long, base bordered and produced backward to form 
an obtuse angle, the angle truncate, concave on either side, emarginate 
anteriorly and sides rounded and narrowed anteriorly, a narrow elevated 
line down centre more prominent and shining at base and not reaching to 
anterior margin ; coarsely and somewhat closely rugose ; a few stout 
bristles, yellow in colour, on anterior outer margin. Scutellum squarish, 
oblong, punctate. Elytra slightly wider than thorax, not quite twice as 
long as latter, conjointly emarginate at base, basal borders crenate, basal 
angles strongly rounded and sides rounded from base to apex. Almost 
black with a dull reddish tinge on them ; striate, the striae deep and 
prominent, but not reaching to base of elytra, shining, flat with scattered 
punctures, the interstices slightly elevate and convex, coarsely rugose 
punctate. Under surface black, with a scattered yellow pubescence, abdo- 
minal segments 1 and 5 large and equal to one another, 2, 3 and 4 much 
narrower, punctate with sparse yellow hairs on them. Long 3 millim. 
(Figs. 2, 2fl, PI. VI, show a dorsal and side view of this beetle.) 
Life History. 
Very little is known upon the subject of the life history of this bark 
borer. Nearly full-grown laiw® were found in their galleries in the tree 
towards the end of May, these being the larvte of the first generation of 
the year. The beetles mature about 1st to 2nd week in June. We have 
yet to discover how many generations of the insect there are in the vear. 
In the case of its sal tree confrere in the Dun four, and a partial fifth, 
generations are passed through, and it is probable that the oak species has 
at least three life cycles in a season. It is important that this fact 
should be definitely and accurately determined. Fig. 3 shows the 
diagram of the egg and larval tunnels made in the sapwood and bast by 
this insect. 
