CONTENTS vii 



PAGE 



Sasscer, E. R. Important Insects Collected on Imported Nursery 

 Stock in 1920 353 



Severin, H. H. p. Summary of Life History of Beet Leaf hopper, 

 Eutetlix tenella Baker 433 



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

 Experiments with a Dusting Machine to Control the Beet Leafhopper, 

 Eutettix tenella Baker, with Nicotine Dust. 405 



Sherman, F. Observations on the Natural Enemies of the Fall Canker-- 

 worm, Alsophila pometaria, in Forests of Southern Alleghany Mountains 

 in 1920 478 



Smith, H. S. Biological Control of the Black Scale, Saisselia oleae 

 Bern, in California 348 



Smith, R. C. Observations on the Fall Army Worm and Some Control 

 Experiments' 99 



Observations on the Fall Army Worm, Laphygma frugiperda Smith 



and Abbott, and Some Control Experiments 300 



Smith, R. H. Anuraphis helichrysi Kalt., a Pest of Prune, Plum and 

 Red Clover in Idaho 422 



Snyder, T. E. Injury to Structural Timber by Lepidopterous Larvae 366 



White-Ant-Proof Wood for the Tropics 496 



Stearns, L. A. Parasitism and Nicotine in the Control of the Oriental 

 Peach Moth: A Second Report 336 



Sturtevant, a. p. Mixed Infection in the Brood Diseases of Bees 127 



Swezey, O. H. Some Recent Insect Immigrants in the Hawaiian Islands 254 



Tanquary, M. C. Legislation for the Control of Foul Brood 121 



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



Wadley, F. M. Life History of the Variegated Cutworm 272 



Webster, R. L. Fumigation with Hydrogen Cyanide for Control of 

 Pear Psylla' 154 



Weldon, G. p. Thrips Injury to Peaches in Southern California 424 



Wilson, H. F. Spread and Control of American Foul Brood' 134 



