Article beginning on page 174.
Psyche 3:174, 1880.

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of eggs to cocoons, mostly in midsum-
mer, to be 52 dins. Ati Coalb~irgh, the
broods ran from 33 clays in April
and May to 28 days in June and
July. The larval period only at Albany
was 33 days, at Coalburgh 22 and 18
cLzys. Perhaps in attaining to a clouble or triple annual generation, the species has come to have its larval stages dimin- ished by one, and in W. Va. molts three
times while at Albany it molts four times. Mr. Trouvelot (Amer. Nat., v. 1 ,p. 37)
has recorded his observations on the
allied silk-worm moth Telva. polyphems,
and says ; " The poh/phemiis worm, like
all other silh worms, c/tcmges its s h five times diirinq its larval life.''
In the Ent~~iaologist, London, 1879,
v. 12, 11. 26 et seq., Mr. P. 13. Go~e
details at great length the larval liistory of Attactis atlas from farther Asia. bred by him from eggs obtained from the fe-
male which had emerged from cocoon in
Europe. He describes in full five molts. The only other large moth whose lar-
val stages I have carefully watched is
DWCI~~L~)II imperirilis, which has four
molts only.
EFFECT OF COLD APPLIED TO CHRYSALIDS OF LIMENITIS DIS IPP US.
BY WILLIAM I1 : EDWARDS, COALl~L'I~GII. W. VA. I SUCCEEDED in bringing two larvae
through the last winter.
No. 1 pupated
at 8 P. M., 22 April.
At 9 P. x., same
clay, I placed the chrysalis in an ice box, where it remained till 9 P. M., G May, 14 days. No. 2 pupated at 7 r. M., 27
April, and at 7 A. M., next day, the
din salig was put on ice and remained till 7 A. x., 7 May, 10 days. Temperature,
40å F. [4O 0.1. (In 1880,I subjected two chrysalids of this species to a teinpcra- tare of 32' F. [0å C.], and killed both.) On 13 May, two butterflies eniergwl:
from No. 1, a <? ; the other Q . Both
are alike in color above and below :
above dark, resembling~outhern Dmtais
arc7~ippus. In the 8 , the black mesial
band on hind wings is wider than nsual,
though I have one example, bred at
Coalburgh, like it ; but in the female, tins hiintl is extraordinary, nearly three times as wide as nsnal. ineasiiring 2.5 mm. at the cell. Beneath, in both, the whole
hind wing is very light. a fawn-color.
with no fnlvons tint, quite unlike any
Coalbnrgh 01- western or sontliern cx-
ample, though resembling Catskill exam-
ples, except that these have a tint of
fulvous .
As appears, the change is most decided
in the female, though this was exposed
when 1'2 hours old and for 10 days
o~~ly, against 14 days in the male, at 6 hours old.
I had hoped to see the butterflies
much inelanized. and so approachiiig
Limenitis proserpina, from which it has
been conjectured disippus is derived.
But nothing has occurred in support of
that view.




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