842 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 
During the past summer (1887) 1 have found this caterpillar most fre- 
quently on the common bush juniper in .Maine, but in former years have 
beaten the ehrysalids out of the trees already mentioned. 
The caterpillar is found in July, but becomes fully grown from the 
1st to the 15th of August. Before transforming, it spins the leaves 
together with a few coarse silk threads and remains in the tree. Those 
reared on the juniper became ehrysalids by the 19th or 20th of August, 
and the moths appeared by the 9th of September, so that the pupa 
state lasts about three weeks. The mot lis continue to appear until the 
middle or last of September. Those found on the spruce appeared Sep. 
tember 15, and a pupa found on the white pine disclosed the moth Sep- 
tember 13. Probably by the middle of September all the moths have 
appeared. Whether they hibernate and lay their eggs in spring, or 
whether their eggs are laid in the autumn on the terminal twigs, and 
the species is alone represented during the winter by the eggs, remains 
to be ascertained. 
The moth is easily recognized by the sharp fore wings with the nar- 
row, dark, mesial band, which is black and very narrow on the inner 
edge, and by the pale zigzag line re-appearing beneath, also by the 
black streak near the apex and a smaller apical black dot. It is closely 
related to the European T. juniper ata, which feeds on the common 
juniper. 
Larva. — Body smooth, cylindrical ; head smooth, slightly bilobed, not quite so 
wide as the body. Head aud body green, the color of the upper side of the juuiper 
leaves on which it feeds. A broad pale glaucous white dorsal baud, on each side of 
which is a yellowish-white line, which extends along the sides of the supra- anal plate, 
but not meeting its fellow at the apex. Anal legs broad and large, green, with two 
tubercles which are large and rounded conical. Thoracic legs pink. Length, 16 mm . 
Pupa. — Of the usual family shape ; green, with a white lateral stripe from the head 
to the tip of the abdomen, and another lower down along the abdomen, as well as 
two parallel dorsal whitish stripes. Abdominal spine larger aud longer than usual, 
flattened vertically, acute, surface corrugated ; two stout terminal bristles excurved 
at the ends, a much smaller pair at base of these and along the sides of the spines two 
additional pairs. Length, 6 mm . 
Moth. — Pale ash, base of fore wings with two bent parallel black lines, the outer 
heavier, and marked with longitudinal stripes on the veinlets. Beyond is a broad 
pale band slightly bent on the median vein. Still beyond is a median band margined 
with black, narrowing more than usual on the inner margin of the wing, where the 
two black margins meet, forming two contiguous black patches; in front the band 
incloses obscure ashen ringlets. A black discal dot : beyond, an obscure pale patch- 
A white zigzag marginal line, the sharp scallops inclosing dark dots. Hind wings 
uniformly pale ash color, crossed by two dusky lines. Expanse of wings, 25 mm (one 
inch). 
23. Eupithecia larva. 
This caterpillar was beaten from spruce trees June 11, at Beede's, 
Adirondacks. 
Larva. — Body very slender. Head much flattened, as wide as the body in front, 
the latter widening a little towards the first pair of abdominal legs. Supra-anal plate 
ending iu two large long spines; lateral ridges distinct, narrow; below it a little 
