Article beginning on page 413.
Psyche 3:413, 1880.

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PSYCHE. 413
become greenish or whitish and opaque
after some time ; and, if exposed to too dry an atmosphere, both pupation and
the exclusion of the imago are rendered
impossible or difficult. Therefore, I
imagine a close, inen~brauaceons cocoon
is a necessity ."
I have found, in examining a large
number of specimens of cocoons of C.
swopJi~tilariae, no exception to the exis- tence of punctures in them, altho the
pnnctiires are never large enough to be
termed open meshes. Were it not for
these pimctiires the cocoons of C.
.scrophiiZan'ae would be, to all appear- ances, hermetically sealed. This is not
the case with the cocoons of bowbycidae, as can be seen readily, by covering a
portion of a cocoon with soapy water
and blowing through the portion to be
tested. The numerous bubbles which
form on the outside in such an experi-
ment are clear proof of the passage of
air throngh the cocoon-walls. Even the
very compact inner lining of the cocoon
of A~taciis prometheci readily allows the passage of air.
Treated with dilute acids the cocoon
of C. scrny~~z~lco~ic~e shows little chauge ; alkalies dissolve out of it, as they do
out of cocoons of bombycidae and even
out of portions of insects themselves, a brownish-yellow coloring matter, which
loses its color on being acidulated, and regains it upon again making the solu-
tion alkaline. The whole cocoon of C'.
scroph'idnriae is soluble in strong nitric aci (1.
NOTES ON PTEROPHORIDAE OF NORTH AMERICA. 2. MY GEORGE DIMMOCK, CAMBRIDGE, MASS.
In the list of references concerning
ptwopl~onda~ wliicli 1 published in
PSYCHE, Sept.-Oft. 1883, v. 3, 11. 402-
404, I o.mtted, by some accident, all
references to a paper published b\ Dr.
D. S. Kellicott in tha Bulletin of the
Bnff'tilo souietj of natural scienc?s for Janiiiirj 1892, air1 afterwards as a
separate. Wishing to make my notes
:is complete as possible I add the follow- ing data tsiken from that pap2r. t112 title of which is "Notas on the-larviie of some local pterig)'iorfrftie.''
Platy$fi'lus rardiiidiirtylns Rile!. Kelli- cott (Bull. Buffalo soc. nat. sci., Jan. 1882, v. 4, p. 47) gives notes on the larva and pupa of this species, and states that it is often parasited by a variety of Ichneumon hu?n///s, Provancher.
Oedematophorus crettdactylus Fitch (ist
and 2nd Repts. nox. ins. N. Y., 1856, p. 142). Kellicott (Bull. Buffalo soc. nat. xi., Jan. 1882, v. 4, p. 48-50) describes the larva and pupa of this species. The gregarious larvae feed upon Eapaforimn ĺ´pur/~;renm the
leaves of which they fasten together with a web.
N. Y., Cal., Vancouver's Is].
Lioptilits fio~izodncfylus Walk. Kellicott (Bull. Buffalo soc. nat. xi., Jan. 1882, v. 4, p. 48-50) describes larva and pupa of this spe- cies. The gregarious larvae feed airong
leaves of Eapaio~,/kiii piirfureiim which they have webbed together.
Buffalo, N. Y.
Aci.'pfilus inoiifanns, Wlsm. Kellicott
(Bull. Buffalo soc. nat. xi., Jan. 1882, v. 4, p. 51-52) describes 1 arva and pupa; the former feeds upon the leaves of different species of SoJidqo. Buffalo, N. Y.




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