THE NANTUCKET PINE MOTH. 747 
there are numerous, often partially confluent, short bars or stripes on the upper half 
of the wing, and, next the inuer margin, very brief similar bars, increasing in size 
toward the base, aud on the Dasal third forming a dull pearly patch. The whole of 
the basal third or fourth of the wing is traversed irregularly by transverse pearly 
lines, often nearly or quite confluent ; and in some individuals the whole basal half 
is of nearly uniform pearly hue. Many of these pearly scales appear to have fuligin- 
ous bases, so that where the patches are broadest the color is usually duller. The 
outer edge of the wing is marked by scattered black scales, edged within and some- 
times without by a delicate white line ; and the fringe, which is very long, especially 
below, is pearly fuliginous, often deepening apically to black, and with all the 
scales minutely white tipped, forming transverse lines of white upon the darker 
ground. Hind wings very pale silvery gray, slightly infuscated, the fringe infus- 
cated only at base, outside of a silvery hue. Legs silvery gray, the tarsi infuscated 
above at the base of all the joints. Abdomen silvery gray, more or less infuscated 
above, or sprinkled with brownish fuscous scales. 
Expanse of wings, 12 to 14 mm ; length of body, 4.75 to5.75 mm ; length of antennae, 
3.5 mm . Described from twenty specimens. 
There seems to be no colorational distinction between the male and the female, 
but considerable general variation, both in the markings and in the tints of this 
beautiful but destructive insect. Some individuals occur in which the deeper colors 
are intense, while at the other extreme the pearly scales have spread so widely, and 
at the same time the more brilliant tints have become so subdued, as to give the 
whole insect a drab appearance. The two shades of umber also grade into each 
other in all cases, being seldom sharply separated. The markings as above described 
are those most prevalent. 
The eggs seen were not described. 
Larva (fig. 4). — Slender, cylindrical, slightly depressed, of a pale-brow^ color 
above, the thoracic segments slightly darker, with a faint pale mediodorsal line 
which broadens and becomes somewhat yellowish on the two hinder segments, on 
the last occupying nearly the whole breadth of the segment ; the lower part of the 
sides and the under surface are dirty luteous. The head varies from castaneous to 
pitchy castaneous, is broader than long, obscurely 3ubcordate, the lateral hemis- 
pheres being tumid above, and separated by a deep and narrow groove ; the antennae 
and most of the mouth-parts are pale luteous, the ocelli black. The prothoracio 
shield is of the color of the head, transversely obovate, more than twice as broad as 
long, and divided by a pale mediodorsal stripe ; the hinder margin is broadly rounded, 
the front margin nearly straight, and the lateral margins rounded subangular, poste- 
riorly melting into the hind margin. The anal plate is scarcely darker thau the body, 
small, almost semicircular, but less than twice as broad as long, and slightly tumid. 
The legs are of the color of the under surface of the body, but are marked with fus- 
cous, the claws reddish ; the prologs are also fuscous, and the spiracles edged with 
piceous. The body is uniformly but rather sparsely clothed with microscopic hairs, 
scarcely perceptible with a good lens ; and besides these has longer and stouter, but 
still delicate pale hairs, about as long as the width of the body, scattered over the 
upper surface, arising one each from minute piceous warts, which are definitely 
arranged on both sides of the body; two on a segment in a dorsal-pleural row, two 
on a segment in a ventro-pleural row, and one on a segment in a stigmatal row. 
There are similar hairs scattered more irregularly on the head and prothoracic. 
shield. Length, 13 nim ; breadth, 2 mm . 
Chrysalis (figs. 2, 2a, 3, 3a).— Almost uniformly castaneous, with wing-cases, 
eye-covers, antennae, aud sometimes some of the hinder edges of the dorsal scuta of the 
abdomen dusky. The rostrate prolongation of the anterior extremity of the body (fig. 
2) is bent downward at a slight angle, preserving above the curve of the head, pretty 
strongly and uniformly compressed, docked apically, triangular as viewed laterally, 
the sides hollowed, and the upper surface slightly sulcate, its lateral edges a little 
