1150 General Notes. [November, ) 
her. To the end of her abdomen were attached a few fragments 
of the reddish inner bark of the fir, and two or three small green 
pellets, probably excrement; but this showed that she hai 
already deposited at least one egg, and that the labor of oviposi- 
tion was slight, the end of the abdomen probably being simply 
extended and thrust intọ the gape of the incision. 
By prying up the pad formed by the jaws, a shallow but roomy 
cell or chamber is made for the egg, which lies nearly or quite 
horizontally, not vertically, to the trunk of the tree. 
The egg is very large, ovo-cylindrical, well rounded but taper- 
ing somewhat at each end, of a dirty white color, and in length 
is Oe ca : 
On visiting the tree a week later and removing a portion of 
the bark and examining it Sept. 6-8, the eggs had in some cases 
hatched and the larvæ had begun to descend slightly into the 
bark. On hatching they begin at once to gnaw a mine, throwing 
their castings out through the gash originally made by the 
so that it was easy to ascertain, without disturbing the bark, 
whether the eggs had hatched or not. The larva indifferently 
lies with either side, dorsal or ventral, presented outwards. be 
days after (Sept. 12) several had bored through the pieces of a 
making the usual flattened oval hole, but probably in nature? 
larva remains hidden in the bark through the winter, not begin- 
ning to penetrate the wood until the following spring. xi 
The length of the larva when freshly hatched was 5-6™ 
e body was rather stouter than in the full-grown larva. but 
many eggs are laid by the female is not known, Dut | 
probably, judging by their large size, comparatively few. hundred 
Another female was found on the same tree. Over a? ai 
gashes had been made on the western side of this fir n | 
space four feet long. The gashes were so fresh that they pe w 
been made on that and a few previous days. They Y th their 
conspicuous and could, after one had become familiar ee i 
appearance, be detected at the distance of at least five or wring 
r his 
hes, whita 
€ region where they were thickest, forty were oe pass 
Square foot, Of course when they hatch all do not AV seeks 
os ets of Mär hiding places. So far as my observation 
