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CONTENTS 



Page 

 Proceedings of the Sixth Annual Meeting of the Pacific Slope Branch of the 

 American Association of Economic Entomologists 



Part I, Business Session 389 



Part II, Papers and Discussions 



Dust Insecticides in California E. 0. Essig 392 



Notes on the Use of Nicotine Dusts A. W. Morrill 394 



Two Mechanical Devices for Controlling Western Cucumber Beetles 



R. E. Campbell and W. H. Nixon 400 



Experiments with a Dusting Machine to Control the Beet Leaf- 

 hopper, Eutettix tenella Baker, with Nicotine Dust 



H. H. P. Severin, W. J. Hartung, E. A. Schwing and W. W. Thomas 405 



Distributional and ecological Notes on Anopheline Mosquitoes in 



Califprnia W. B. Herms 410 



The Seasonal History of Anopheles occidentalis D. & K. in California 



S. B. Freeborn ilb 



Anur aphis helichrysi Kalt., a Pest of Prune, Plum and Red Clover in 

 Idaho R.H.Smith 422 



Thrips Injury to Peaches in Southern California G. P. Weldon 424 



The Results of Using Certain Oil Sprays for the Control of the Fruit 

 Tree Leaf -roller in the Pajaro Valley, California D. P. Penny 428 



Summary of the Life History of the Beet Leafhopper, Eutettix tenella 

 Baker H. H. P. Severin 433 



Observations on the Biology of Apple Aphids F. H. Lathrop 43iJ 



Life History of the Codling Moth in Walnuts at Santa Ana, California 



H. J. Quayle 440 



Cold Storage Control of Insects £. R. De Ong 444 



Forest Insect Problems on the Pacific Slope A. J. Jaenicke 447 



Biological Notes on Desmocerus, a Genus of Roundhead Borers, the 

 Species of which Infest Various Elders 11. E. Burke 450 



Emopean Cc^rn Borer Conference '^3 



Editorial 



Current Notes 457 



