DIMORPHISM IN TERAS OXYCOCCANA. 23 
dimorphism is unusual in the family, and though some time since re- 
corded by Professor Riley, has not been accepted by Professor Fernald, 
Dr. Brakeley had several years ago reached that conclusion. The gray 
moth is called by Packard “the Glistening cranberry moth,” and de- 
scribed as follows: 
The body is of a dark slate color, and the palpi, which are large and project well 
beyond the head, are of the same color, with a few bright reddish scales at the end 
of the second joint. The tuft of hair on the abdomen is much paler than the rest of 
the body and of the same color as the legs and the hind wings, being of a glistening 
gray color. The fore wings are of a uniform reddish brown color, with a peculiar 
glistening or greasy hue. ‘The red tint is due to scattered, bright red scales. There 
are no other spots or markings on the wing, and the fringe is mottled with red and 
gray scales as on the wings. On the hind wings the fringe is long, silky, glossy, gray- 
ish white. Beneath, the fore wings are pale gray, the hind wings being paler than 
the. fore wings. Length of the body 0.25, expanse of the wing 0.640f aninch. It may 
be readily known by the peculiar, shining, greasy look, and by the rich red scales scat- 
tered over the plain, unadorned fore wings. 
Dr. Packard records his specimen as having been found in October, 
and the description shows it to have been a fresh specimen, and judg- 
ing from the size, probably a female. Of those collected by me, the 
females are, as a rule, considerably larger than the males, though there 
are large malesand small females. After a few days the moths largely 
lose their red scales, which rub off very easily, and they appear then 
of a uniform gray slate color. 
These insects, emerging from the chrysalis in October—in my experi- 
ence, on the 9th and after—pass the winter in this stage, seeking shelter 
in crevices, outhouses, and rubbish heaps. Dr. Brakeley informs me 
that he has often seen them in his eranberry house, and on bright, 
sunny days in winter flying at the edge of woods. In the spring, about 
the middle of April and to the first of May, they deposit their eggs 
and disappear. After the beginning of May they are rarely seen. By 
the 15th of May, or a few days before, the eggs hatch and the larva 
commences its career precisely as does the Anchylopera, except that it 
does not first burrow into the leaf. Some collected by me changed to 
pupe May 24, and transformed into moths June 4; these moths were 
smaller in size than the gray specimens and entirely different in color, 
_ being yellow, with ochreous mottlings, but no distinct markings on the 
fore wings, and silky white on the hind wings and body. On fresh 
specimens the ochreous or reddish scales are dense, and give the insect 
a deeper color; flown specimens lack these scales and appear uniformly 
yellow. The sexes do not differ in size, and none expand more, and 
many less than 0.5 inches. None of these insects showed the slightest 
tendency to the slate-colored form. The second brood of larvie ap- 
pears toward the end of June or early in July, and has precisely the 
same blossom- and berry-eating habit as the Anchylopera ; in fact, I found 
that the berry-eating larve were mostly those of this species. They 
continue this until nearly half grown, and then spin up sprays and leaves, 
