CONTENTS vii 



Pagb 

 Safro, v. I. How to Test for the Presence of Nicotine on Sprayed 



Plants 459 



When Does the Cost of Spraying Truck Crops become Prohibitive 521 



Sanders, J. G. The Committee for the Suppression of Pine BHster 



in North America: Purpose, Personnel and Program 213 



Sasscer, E. R. Recent Vacuum Fumigation Results* 79 



Important Foreign Insect Pests Collected on Imported Nursery 



Stock in 1916 219 



ScAMMELL, H. B. Amphiscepa hivittata in its Relation to Cranberry 552 



ScHOENE, W. J. The Weakness of our Present System of Inspection 



with Regard to Foreign Shipments 216 



Severin, H. H. P. Mediterranean Fruit-fly, Ceratitis capitata Wied., 



Breeds in Bananas 318 



Fruit-flies of Economic Importance in California* 333 



Shaw, H. B. The Activities of the Federal Horticultural Board at 



the Port of New York 217 



Smith, H. S. On the Life History and Successful Introduction into 



the United States of the Sicihan Mealy-bug Parasite 262 



Tucker, E. S. Relation of the Common Root Maggot, Pegomyia 



fusciceps, to Field Crops in Louisiana 397 



ViNAL, S. C. Notes on the Life-history of Marmara elotella Busck, a 



Lepidopterous Sap Feeder in Apple Twigs 488 



Walden, B. H. Simple Apparatus for Insect Photography 25 



Washburn, F. L. Work on White Pine Blister Rust in Minnesota in 



1916 277 



YiNGLiNG, H. C. Aphid Eggs in Texas 223 



Zappe, M. p. Egg-laying Habits of Diprion simile 188 



ZwALuwENBTTRG, R. H. Van. Insects Affecting Coffee in Porto Rico 513 



•Withdrawn for publication elsewhere. 



