CONTENTS 



PAGE 



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



Arizona Wild Cotton or Thurberia and its Insect Enemies in Relation 

 to the Cotton Industry of the Southwest 472 



MozNETTE, G. F. Some Insect Problems Confronting the Avocado 

 Grower 341 



Dusting vs Spraying for the Control of Insect Pests of the Avocado 465 



Control of Two Scale Insects of the Mango 469 



Newell, Wilmon. On The Organization of Work in Economic Ento- 

 molog\- '^" 



O'Byrxe, F. M. Standardized Nursery Inspection 183 



O'Kane, W. C. Industrial Support for Scientific Work-i 36 



OsBORN, Herbert. Ecological Observations on the Hemiptera of the 

 Cranberry Lake Region of the Adirondacks' 254 



Paddock, F. B. The Value of Good Queens 101 



Parker, J. R. and Seamans, H. L. Experiments with Grasshopper 



^^ Baits 138 



Parks, T. H. The Effect of Time of Sowing upon the Control of the 

 Wheat Sheath Worm, Harmolita vaginicolum 490 



Parks, Wallace. Some Apicultural Investigations^ 105 



Parrott, p. J. Control of Sucking Insects with Dust Mixtures 206 



Pellett, F. C. vSome Beekeeping Problems for Experiment Stations 114 



Penny, D. P. The Results of Using Certain Oil Sprays for the Control 

 of the Fruit Tree Leaf-roller in the Pajaro Valley, California 428 



Peterson, Alvah. Some Experiments with Paradichlorobenzene and 

 other Chemicals for the Control of the Peach Tree Borer, Sanninoidea 

 cxiliosii^ 154 



PiULLirs, ]•;. F. The Future of Bee Disease Control 317 



Phillips, W. J. and Poos, F. W. A Lamp for Taxonomic Work in Ento- 

 mology 504 



Quaintance, a. L. Dusting versus Spraying of Apples 220 



Quayle, H. J. Life History* of the Codling Moth in Walnuts at Santa 

 Ana, California 440 



Ressler, I. L. Life History of Pyrausta ainsliei Heinr. at Ames, Iowa, 

 during the Season of 1920 277 



Sanders, J. G. The Trend of Horticultural Inspection 161 



Sanders, J. *G. and DeLong, D. M. Factors Determining Local Infes- 

 tation of the Grape Berry Moth 488 



