CONTENTS OF THIS NUMBER. 



TowKR, D. G.— The External Anatomy of the Squash 



Bugf 



^ - 427 



Johnson, Chas. W.~-The Dipteran Fauna of Bermuda 443 

 KwiNG, H. E.— The Taxonomic Value of the Charac- 

 ters of the Male Genital Armature in the Genus 

 Tetranychus D'ufour 



DiETz, W. G.— A Synopsis of the Described North 



American Species of the Dipterous Genus Tipula L. 461 



Gillette, C. P.— Sorae Pemphiginse Attacking Spec- 

 ies of Populus in Colorado 43c 



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