CONTENTS 



PAGE 



Miscible Oil Versus Fish Oil Soap Sprays for the Control of Florida Aleyrodids 



E. A. Back and S. S. Grossman 453 



How to Test for the Presence of Nicotine on Sprayed Plants V. I. Safro 459 



A Clerid Larva Predaceous on Codling Moth Larvse D. E. Merrill 461 



Hibernation of the House Fly in Minnesota C. W. Howard 464 



An Improved Method of Rearing Tabanid Larvae Werner Marchand 469 



An Infestation of Potatoes by a Midge Edith M. Patch 472 



The Cocoanut-tree Caterpillar, Brassolis isthmia, of Panama L, H. Dunn 473 



Notes on the Life-history of Marmara elotella Busck, a Lepidopterous Sap 



Feeder in Apple Twigs S. C. Vinal 488 



New Species of Economic Mites H. E. Swing 497 



Scientific Notes 502 



Editorial 50'' 



Reviews 50 < 



Current Notes 508 



