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CONTENTS 



Page 



Further Observations on the Effect of Certain Chemicals upon Oviposition 



in the House Fly, Musca domesHca S. E. Crumb and S. C. Lyon 461 



Dusting vs Spraying for the control of Insect Pests of the Avocado G. F. Moznette 465 



Control of Two Scale Insects of the Mango G. F. Moznette 469 



Arizona Wild Cotton or Thurberia and its Insect Enemies in Relation to the 



Cotton Industry of the Southwest A. W. Morrill 472 



Observations on the Natural Enemies of the Fall Cankerworm, Alsophila- 



pometaria, in Forests of Southern Alleghany Mountains in 1920 F. Sherman 478 



The European Corn Borer and the Sugar Cane Moth Borer: A Comparison 



T.E.Holloway 481 



Controlling the Army^yorm in Southeast Missouri 



Vernon King and G. W. Barber 486 



Factors Determining Local Infestation of the Grape Berry Moth 



/. G. Sanders and D. M. Belong 488 



The Effect of Time of Sowing upon the Control of the Wheat Sheath Worm, 



Harmolita laginicolum T. H. Parks 490 



Sources of Infestation of Thrips tabaci J. L. Horsfall 493 



White-Ant-Proof Wood for the Tropics ~ T. E. Snyder 496 



Leafhoppers Injuring Woodbine G. W. Barber 502 



A Seed Potato Maggot, Hylemyia trichodactyla 0. A. Johannsen 503 



A Lamp for Taxonomic Work in Entomology W. J. Phillips and F. W. Poos 604 



The Argentine Ant Builds Earthen Protectors for Mealy Bugs E. 0. Essig 506 



A Home Made Mechanical Poison Bait Mixer B. G. Thompson 508 



Scientific Notes 509 



Reviews 512 



Editorial 513 



Current Notes 514 



