CONTENTS OF THIS NUMBER 



Smith, C. P. — A Preliminary Study of the Araneas Thera- 

 phosae of California 207 



Davis, J. J.^-Studies on Aphididae 251 



Needham, J, G. — Critical Notes on the Classification of the 

 Corduliinae (Odonata) 273 



Riley, W. A. — Muscle Attachment in Insects 265 



Howard, L. O. — ^A Key to the Species of Prospaltella with 

 Table of Hosts and Descriptions of Four New Species. . .281 



Hood, J. D. — Two New Species of Idolothrips 285 



Index 291 



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