CAMBRIDGE ENTOMOLOGICAL CLUB. 
OFFICERS FOR 1918. 
President: 2. 6 OV Ga a WE WH ESEEE, 
Vice-president ior. i) regard pe S. W. DENTON. 
Secretary \! © F, 4 Va se ee ee A. C. Kinsey. 
TPCasuren se ic a A Oh Le, pee ee ool cae ee ee 
Executive Committee 
A. F. Burgess, F. W. Dones, C. A. Frost. 
EDITORIAL BOARD OF PSYCHE. 
EDITOR-IN-CHIEF. 
C. T. Bruzs, Harvard University. 
ASSISTANT EDITOR. 
R. W. Guaser, Harvard University. 
ASSOCIATE EDITORS. 
C. W. JOHNSON, V. L. KELLOGG, 
Boston Society of Natural History. Stanford University. 
A. L. MELANDER, A. P. Morss, 
Washington State College. Wellesley College. 
J. H. EMERTON, J. G. NEEDHAM, 
Boston, Mass. ‘Cornell University. 
W. M. WHEELER, 
Harvard University. 
PsycHE 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 Treasurer, Cambridge Entomological Clnb, 
Bussey Institution, Forest Hills, Boston, Mass. 
Orders for back volumes, missing numbers, notices of change of address, etc., should be sent 
to Dr. R. W. Guaser, 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. Brus, 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 will be that of typesetting only, which 
is about $1.20 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. 
AUTHOR’S SEPARATES. 
Reprints of articles may be secured by authors at the following rates: 
Length 50 Copies, 50 Copies, 100 Copies, 100 Copies, 
of Article. without cover. — with cover. without cover. with cover. 
lto 4 pages $3.00 $7.00 $5.00 $9.00 
5 to 8 pages 7.00 11.00 11.60 15.60 
9 to 12 pages 8.50 12.50 14.10 18.00 
13 to 16 pages 9.50 13.50 15.80 19.80 
17 to 32 pages 18.00 22.00 35.00 39.00 
Entered as second-class mail matter at the Post Office at Boston, Mass. Acceptance for 
mailing at special rate of postage provided for in section 1108, Act of October 3, 1917, author- 
ized on June 29, 1918. 
