PSYCHE 



A JOURNAL OF ENTOMOLOGY 



Established in 1874 



VOL. XXV APRIL, 1918 NUMBER 2 



CONTENTS. 



Key and Descriptions for the Separation and Determination of the First 

 Instar Stem Mothers of the Three Species of Aphids Most Commonly 

 Attacking the Cultisated Apple. M. T. Smulyan 19 



Myriapods from Nash^^lle, Tennessee. R. V. Chamberlain 23 



Notes on Diptera. J. M. Aldrich 30 



Book Reviews: Field Book of Insects, by F. E. Lulz and A Year of Costa 



Rican Natural History by A. S. and P. P. Calvert 36 



Exchange Column 37 



