66 
First Report on Economic Zoology. 
Fletcher and Slingerland have found that the eggs hatch in late 
summer and early autumn and that winter is passed in the larval 
stage. This is undoubtedly the usual case, but that some hibernate 
in the egg condition I think very probable, as I have found young 
larvae in the early spring not more than one-twelfth of an inch long, 
whilst those that hibernate are considerably larger. 
The eggs (Fig. 5, e) are flat, round or oval, the centre being 
slightly elevated, they are very transparent and look like little drops 
of gum on the leaf. When several are laid together they overlap 
one another like flsh scales. In general appearance they resemble 
the ova of the Codling Moth ; the outer edge is marked with a well 
defined reticulate sculpturing ; the central part of the egg is usually 
green, the colour being due to the developing larva within showing 
through. 
The egg stage lasts from seven to ten days. The young larvae on 
coming from the egg at once commence to feed upon the lower layers 
of the leaf, forming for themselves a little tube of silk open at each 
end and- attached to the leaf, usually at the mid-rib. When feeding 
off the leaf the larvae form a slight silken web 
which serves as a protection for them. In this 
manner the larvae go on feeding until about the 
middle of September, by which time they are 
about half grown. Professors Slingerland and 
Fletcher were the first to show that these small 
larvae pass the winter in small silken cases on the 
trees, as inconspicuous objects covered with dirt 
and not more than one-eiglitli of an inch long. 
These winter houses (Fig. 6) are found at the 
base of a bud or under a dead leaf or bud scale. 
When cpiite young the larvae are green, and 
this is the colour most usually found when 
they are in their “ houses.” When the buds 
commence to swell they crawl out and enter 
them and become dull reddish-brown with black 
Twig with larval cases (a) of head and black first segment; when nearly 
Bud Moth and buds (b). l lv i 
mature they become a more pronounced reddish- 
brown, the dark head, first segment and legs showing up pro- 
minently. When quite mature they reach half-an-inch in length. 
During the latter part of their life they feed amongst the leaves, 
which they spin together, and pupate in a tube of dead leaves 
as previously described. The pupa is bright brown, with two lows 
of backwTirdly projecting spines on each segment. 
