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appearance of his apple nursery, the foliage looking, at a distance 
as it it had been scorched by fire. Upon entering the inclosure 
the authors of the mischief were readily detected. Upon putting 
apart the two halves of the folded leaves, a little worm could occa 
sionally be seen, but at this date most of them had passed intc 
the pupa state, and many of the moths had already emerged, sc 
that a flock of them could be put to flight almost anywhere by 
brushing against the plants. Mr. Wier says that as little known 
as this insect seems to be, this is not the first year that they have 
injured his nursery. 
There are at least two broods of this insect in a season. The 
first brood of moths, according to Mr. Wier, make their appear¬ 
ance early enough to deposit their eggs in the folds of the young 
leaves just as they begin to open. Another brood was just emerg 
i«g, as I have above stated, in the third week of July. This brood, 
as Mr. W. afterwards informed me, by letter, began at once tc 
deposit their eggs upon such leaves as had not been injured. Ac¬ 
cording to my own observation, the caterpillars of the earlier 
brood draw the opposite edges of the leaf upwards, by means ol 
their web, till they meet, thus forming a roof over the insect, 
which protects it from the weather, and must also serve to conceal 
it in a great measure from birds and other enemies. It must also 
form a serious barrier to the effective use of any destructive ap¬ 
plications on our own part. But Mr. Wier informs me that the 
young of the last brood, hatching as they do on the surface of the 
mature and rigid leaf, do not draw its edges together, but simply 
protect themselves by constructing a web over the surface of the 
leaf. From the above account, it is evident that this little insect 
resembles, in most of its habits, the larger and more common Tor- 
trix of the apple and the rose. In what form they pass the win¬ 
ter I believe has not yet been determined. 
If this insect should spread so as to infest other nurseries, as it 
has that of Mr. Wier, it would prove itself a pest of the most se¬ 
rious character ; and, as far as we can judge, from present appear¬ 
ances it will be a difficult matter to reach them with remedial 
agencies, both on account of the closure of the leaf in which they 
dwell, and their webby covering. Fortunately, as is the case with 
most other double-brooded insects, the first brood is comparatively 
limited in numbers ; and Mr. Wier thinks it would have paid him 
