11 
Glover's account of their working dowiiwanl in the old t wios from the 
teiniiiial buds before the startinf>- of the leaves in April :ii)i)areiitly 
can not be questioued, but seems not to be tlie normal course, as shown 
b}' the observations since made. 
In our experience, the hirva* be^in to mi f> rate only after the new 
fidiage has be<;un to put out, and they attack the new shoots at any 
point, .lienerally, however, from one-half inch to an inch from the apex, 
eiiher near or in tlie crotch formed by the leaf petiole and the stem. 
The longest burrow observed was l.J inches and the shortest one-fourth 
inch. Sometimes the burrow extends about one eighth inch above tlie 
the entrance, and occasionally the larva' simply eat into the shoot as far 
as the pith and then go elsewhere. The larva? are seemingly restless 
and not easily satisfied, and are continually moving from one shoot to 
another, and are most active travelers. In this way a single larva may 
destrvoy or injure several shoots 
before reaching maturity, thus 
greatly increasing the damage. 
Professor Com stock's observa- 
tions on the habits of the larvie in 
the young shoots are slightly at 
variance with the above. He says 
the larvje puncture the shoots at 
the base, eating them oft" com- 
pletely, the severed twigs remain- 
ing attached to the branch by the 
gummy substance which exudes 
from the wound. This particular 
form of injury we have not noted. 
When working in the succulent 
new growth the larvie bores rather 
rapidly, sufficiently so at least to 
excavate a burrow two-thirds of its length in an hour. The length of 
time spent by the hibernated larva? in coming to full growth in the 
green sh.oots is comx^aratiAely short, not exceeding ten to fifteen days. 
In California and also in Washington the larvie begin transforming to 
pupic in the latter part of Ainnl, and the moths of the first brood emerge 
throughout May. 
The adult larva tapers strongly toward either end, and attains a 
length of three-eighths to a half-inch, or slightly more when in motion. 
It is of a dull reddish- brown color, the reddish color predominating 
before maturity and the latter after maturity, and the head, and the 
cervical and anal shields are dark brown or almost black. The space 
between the segments is not-iceably light colored, and especially between 
the second and third thoracic segments. The hairs are long and spring 
singly from minute tubercles. Other details of structural features are 
shown in the illustration (fig. 2 h). 
In confinement the larva on reaching full growth spins a scanty web, 
Fig. 2. — Aiiarsia lineatella: a, new shoot ofpeacli 
withering from attacks of larva> : b, larva en- 
larged : c, pupa enlarged (original). 
