CAMBRIDGE ENTOMOLOGICAL CLUB. 
OFFICERS FOR 1917. 
Presidente O62 SNe Om Oe taal oie Gx.) CANTO Eee 
Vice-president) bo ay aia S. W. DENTON. 
Secretary.) Gk es Re ag eel VS ce A eee ev 
TTOOSUTET NE SO 2 grok Chane tate iin H. A. PRESTON. 
Executive Committee 
A. F. Burasss, F. W. Donan, R. W. GuasEr. 
EDITORIAL BOARD OF PSYCHE. 
EDITOR-IN-CHIEF. 
C. T. Brusrs, Harvard University. 
ASSISTANT EDITOR. 
W. M. Mann, Harvard University. 
ASSOCIATE EDITORS. 
C. W. JoHNson, V. L. KEttoca, 
Boston Society of Natural History. — Stanford University. 
A. L. MELANDER, A. P. Morse, 
Washington State College. Wellesley College. 
J. H. Emerton, J. G. NrEpHam, 
Boston, Mass. | Cornell University. 
: W. M. WHEELER, 
Harvard University. 
PsycuHeE is published bi-monthly, the issues appearing in February, April, June, August, 
October and December. Subscription price, per year, payable in advance: $1.50 to subscribers 
in the United States, Canada or Mexico; foreign postage 15 cents extra. Single copies, 35 cents. 
Cheques and remittances should be addressed to H. A. Preston, 17 East Highland Ave., 
Melrose Highlands, Mass. 
Orders for back volumes, missing numbers, notices of change of address, etc., should be sent 
to Dr. W. M. Mann, Bussey Institution, Forest Hills, Boston, Mass. 
IMPORTANT NOTICE TO CONTRIBUTORS. 
Manuscripts intended for publication, books intended for review, and other editorial 
matter should be addressed to Professor C. T. Brugs, Bussey Institution, Forest Hills, 
Boston, Mass. 
Authors contributing articles over 8 printed pages in length will be required-to bear a part 
of the extra expense for additional pages. This expense wil! be that of typesetting only, which 
is about one dollar per page. The actual cost of preparing cuts for all illustrations must be 
borne by contributors; the expense for full page plates from line drawings is approximately 
%3.60 each, and for full page half-tones $4.80 each, smaller sizes in proportion. 
REPRINTS OF ARTICLES CAN BE SUPPLIED AT THE 
FOLLOWING RATES: 
| 
Number | 50 copies ¢ 100 copies 50 copies 100 copies 
of pages without covers without covers with covers | with covers 
: ; re | 
14 $1.50 $2.50 $3.50 
5-8 3.50 5.80 5.50 
9-12 4.25 7.05 6.25 
13-16 4.75 790 6.75 
No reduction can be made for less than 50 copies. 
