8 
[March 
have always found it in those that spring from the trunk. Its mine is 
extremely long and very narrow, being only a tract beneath the young 
and delicate cuticle of the branches^ sufficiently wide to accommodate 
the body of the miner. At first it is difficult to detect the mine, but 
after some months it is easily traced by the elevated line of reddish- 
brown matter that marks the coarse of it. Thus it is easily found in 
early spring before the buds have expanded, and the larva may be 
sought in April and is easily reared, In the spring the larva is of a 
dark lemon-yellow color without markings, and at this time the larva 
can be seen through cuticle of the branch. About the middle of May 
or rather about the 10th of the month, the larva will be found banded 
alternately with red and yellow, with two black dorsal dashes on the 
second segment. (I regard the. head as the first.) This is the indication 
that it has reached its maturity and in a day or two it cuts the cuticle 
and leaves the mine to weave its cocoon, sometimes in the angle of a 
bud on the branch of which it has been feeding, and sometimes on ad¬ 
jacent substances. 
In rearing this insect, it is simply necessary to thrust the branches 
of the willow into wet sand contained in some convenient vessel and 
to protect them so that the larvae cannot wander after leaving their 
mines. 
The perfect insect appears after a pupation of about a month, or as 
in the case of one specimen specially observed in 26 days. It may be 
found as an imago, therefore, about the middle of June. 
GLYPHIPTERYX, Hiibner. 
Wings oblong or elongate, with moderate long cilia. Hind wings 
rather ovate or lanceolate. The costal vein is conspicuous, free and 
simple. The subcostal simple, attenuated towards the base. The dis- 
cal vein gives rise to two discal nervules. The median subdivides in¬ 
to three branches, the upper two arising from a common base. 
In the anterior wings the secondary cell is distinct and the subcostal 
vein subdivides into four branches, the first arising behind the second¬ 
ary cell and three from its hinder end, the last of which is delivered 
to the tip of the wing. Beneath these are three nervules thrown olf 
from the middle of the disk. The median is 8-bran died, giving ofi' 
the nervules somewhat aggregated. 
Head smooth. Forehead broad. Ocelli large. Antennm slender, 
short, not one-half as long as the fore wings, with distinct joints. Lab- 
