CAMBRIDGE ENTOMOLOGICAL CLUB 



OFFICERS FOR 1920 



President C. A. Frost 



Vice-President W. L. W. Field 



Secretary J. C. Emerton 



Treasurer F. H. Walker 



Executive Committee 



S. W. Denton, L. W. Swett, P. G. Bolster 



EDITORIAL BOARD OF PSYCHE 

 EDITOR-IN-CHIEF 



C. T. Brues, Harvard University 

 associate editors 

 C. W. Johnson, V. L, Kellogg, 



Boston Societ}^ of Natural History Stanford University 



A, L. Melander, a. p. Morse, 



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: $2.00 to subscribers 

 in the United States, Canada or Me.xico; foreign postage 15 cents extra. Single copies, 40 cents. 



Cheques and remittances should be addressed to Treasurer, Cambridge Entomological Club, 

 Bussey Institution, Forest Hills, Boston 30, Mass. 



Orders for back volumes, missing numbers, notices of change of address, etc., should be sent 

 to Cambridge Entomological Club, Bussey Institution, Forest Hills, Boston 30, Mass. 



IMPORTANT NOTICE TO CONTRIBUTORS 



Manuscripts intended for publication, books intended for review, and other editorial matter 

 should be addressed to Professor C. T. Brues, Bussey Institution, Forest Hills, Boston 30, 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 .11.20 per page. The actual cost of preparing cuts for all illustrations niust 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 



of Article. 



1 to 4 pages 



5 to 8 pages 



9 to 12 pages 



13 to 16 pages 



17 to 32 pages 



Offprints, if occurring in one signature, per 100, $2.50; if in two signatures, $4.50. 



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 1103, Act of October 3, 1917, 

 authorized on June 29, 1918. 



