Article beginning on page 170.
Psyche 4:170, 1883.

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170 PSYCHE. [May 1884.
PSYCHE.
CAMBRIDGE, MASS., MAY 1884.
Communications, exchanges and editors' copies should be addressed to EDITORS OF PSYCHE, Cam. bridge, Mass. Communications for pziblication in PSYCHE must be -properly authenticated, and no anony- mous articles will bepublished.
Editors and contributors are only re.~ponsjbZe for fie statements made in their own comwzu;zications. Works on subjects not related to entomology will not be reviewed in PSYCHE.
For rates of subscription and of ad-vertising, seead- vertising CO/~L~~?IS.
- -
PROCEEDINGS OF SOCIETIES.
CAMBRIDGE ENTOMOLOGICAL CLUB.
(Continued from p. 760.)
Mr. G. Dimmock showed the two halves of
a split wing of Attacus rerro-pia, in which the two layers of the wing had been
sep-
arated by the following mode.
The wing
from a specimen that had never been dried is put first into seventy per cent. alcohol, then into absolute alcohol, and from the latter, after a few days' immersion, into turpentine. After remaining a day or two in turpentine, the specimen is plunged suddenly into hot water, when the conversion of the turpentine into vapor between the two layers of the wings so far separates these layers that they can be easily parted and mounted in the
usual way as microscopical preparations on a slide. This is an easy way of demonstrating the sac-like nature of the wings of insects. Dr. H. A. Hagen showed preparations to
illustrate organs, of undetermined function, found on the larvae ofgompkidne, h'bi,Zl~/idae, aeschnidae, but not as yet found on agrionidae, which he believes to be traces of seginental organs. The organs in question are little cavities or invaginations of the epidermis be- tween the segments, one on each side of the median
ventral line, on one, two, or three
abdominal segments according to the family to which the larva belongs. Dr. Hagen gave a brief notice of these organs in the Zoolog- iscfier awzeiger, 5 April 1880, jahrg. 3, p. 161.
Mr. G. Dimmock showed a number of mi-
croscopical preparations to illustrate different points of insect anatomy.
11 JAN. 1884.-The 98th meeting, the tenth annual meeting, and the seventh since the in- corporation of the Club, was held at the Secre- tary's house, 54 Sacramento St., Cambridge, 11 Jan. 1884. This meeting terminated the first decennial of the Club's existence, the first meeting having been held g Jan. 1874. I11 the absence ofthe President. Mr. C. C. Eaton was chosen Chairman. Six persons were pres-
ent.
The Secretary announced the withdrawal
from the Club of Mr. Edward Burgess, of
Boston, Mass.
The following persons were elected to ac- tive membership : Charles C. Beale, of Faulk- ner, Mass. ; Willard Looinis Devereaux, of Clyde, N. Y. ; Thaddeus William Harris
(grandson of She well-known entomological author who bore the same name), of Cam-
bridge, Mass.; and John George Jack, of
~hateauguay Basin, P. Q, Canada.
The following officers were elected for the ensuing year : President, Samuel Hubbard Scudder ; Secretary, GeorgeDimmock ; Treas- urer, Benjamin Pickinan Mann ; Librarian. Clifford Chase Eaton; members at large of the Executive Committee, Roland Hayward
and Thaddeus William Harris. K. P. Mann
was elected managing editor and G. Dimmock associate editor of PSYCHE for the ensuing year.
The annual reports of the Secretary, of the Treasurer, and of the Librarian were read and approved. [See further on.]
The address of the Retiring President, Mr. B. P. Mann, upon "The bibliography of en- tornology" was read by the Secretary. [This address is printed in full in PSYCHE, April 1884, V. 4, P. 1 j.5-159*]




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