CONTENTS 
Sprinkling Sewage Filter Fly, Psychoda alternata Say 
T. J. Headlee and C. H. Beckwith 
The Use of Palliatives for Mosquito Bites H. E. Ewing 
A Note on the Life Cycle and Fertility of the Body Louse, Pediculus corporis 
J R.H. Hutchinson 
Av: i 
Cooperation among Agricultural Workers J. J. Davis 
Observations on the Silk Industry in China , C. W. Woodworth 
Clytus devastator, a New Pest of the Florida Orange E. A. Back 
Insect Enemies of the Chinch-bug W . P. Flint 
A New Species of Sciara Bred from Red Clover Crowns F. W. Pettey 
New Economic Pests of Red Clover A. C. Burrill 
Experiments in Cockroach Control . >;■ E. V. Walter 
Notes on a New Mite Attacking Valley Cottonwood P. J. O'Gara 
Scientific Notes 
Editorial 
Obituary 
Stuart C. Vinal 
Harold O. Marsh 
Current Notes 
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439 
