CONTENTS— COM/. 



PAGE 



Spain : The Occurrence of Icerya purchasi .... . . . . . . 345 



U.S.A.: Miscellaneous Pests in Connecticut in 1921 .. .. .. 337 



U.S.A. : Sulphur Compounds for Rust Mites 341 



U.S.A. : Notes on the Coccinellids of Florida . . . . . . . . 349 



U.S.A. : Nursery Insects in New Jersey . . . . . . . . . . 350 



U.S.A. : Control of the Potato Leafhopper in Iowa . . . . . . 354 



U.S.A. : Lepisma, a Household Pest in Michigan . . . . . . . . 355 



U.S.A. : Papilio zolocaon infesting Citrus in California . . . . . . 355 



U.S.A. : The Cherry Fruit Saw]3y and its Control in Caliiornia . . . . 356 



U.S.A. : Field Control of Bruchus obtectus . . . . . . . . . . 356 



U.S.A. : The Identity of the Citrus Mite in California . . . . . . 357 



U.S.A. : Pests intercepted in Quarantine in California . . . . . . 357 



U.S.A. : Measures against Heterodera radicicola in Florida. . . . . . 361 



U.S.A. : The Cicadellidae of Kansas . . . . . . . . . . 363 



U.S.A. : A new Hymenopterous Parasite of Adult Beetles . . . . 363 



U.S.A. : Dusting against Orchard Pests in New York . . . . . . 363 



U.S.A. : Control of Apple Red Bugs by Dusting in New York . . . . 36ii 



U.S.A. : Notes on Dinapate wrighti in California . . . . . . . . 364 



U.S.A. : Life-history Studies of some Florida Aphids . . . . . . 365 



U.S.A. : A new Thrips from Florida . . . . . . . . . . . . 366 



U.S.A. : Insect Pests in South Dakota in 1920-21 367 



U.S.A. : Notes on the Migration of Melanoplus atlantis in North Dakota . . 368 



U.S.A. : Insect Pests in Wisconsin in 1920-21 378 



U.S.A. : Coccids found on Orchids in Colorado . . . . . . . . 379 



U.S.A. : The External Morphology of Lachnosterna crassissima . . . . 379 



U.S.A. : Notice of Papers on Apiculture . . . . . . . . . . 379 



U.S.A. : Horticultural Inspection in Minnesota and Mississippi . . . . 380 



U.S.A.: Insect Pests intercepted in Quarantine in 1921 .. .. .. 380 



U.S.A. : The Legal Aspect of Pest Control 381 



U.S.A. : The Present Status of the Gipsy Moth in New Jersey . . . . 381 



U.S.A. : The Danger of Introduction of Isle of Wight Bee Disease . . 381 



U.S.A. : The Paradichlorobenzene Treatment of Fruit Trees . . . . 381 



U.S.A. : A Mite infesting Greenhouses in Pennsylvania . . . . . . 381 



U.S.A. : Notes on Rhynchaenus rufipes in Utah . . . . . . . . 382 



U.S.A. : Bark-beetles in the Monterey Pine Forests in California . . . . 382 



U.S.A. : Mealy-bug Control on Pear Trees in California . . . . . . 382 



LT.S.A. : Biological l>iotes on Macrosiphum tanaceti . . .. .. .. 385 



U.S.A. : Tests of the Relation of Insects to the Mosaic Disease of Sweet 



Potatoes 387 



U.S.A. : Making Bordeaux Mixture and other Spraying Problems . . 387 



U.S.A. : Experiments against San Jos6 Scale in Arkansas . . . . . . 388 



IT.S.A. : Pests of Grape Vines in Arkansas . . . . . . . . . . 388 



West Indies : Notice of Pests and Diseases in 1920 . . . . . . 353 



West Indies : Experiments on Red Ring Disease of Coconuts in 



Canada . . . . . . . . . . . . . . . . . . 358 



A Revision of the Pipiza Group of the Family Sykphidae . . . . 341 



A new Solvent for Pyrethrum Extract . . . . . . . . . . 346 



Notes on the Habits of European and North American Cucujidae . . 349 



The Preparation and Use of Bordeaux-oil Emulsion . . . . . . 350 



A Box for collecting and transporting living Insects . . . . . . 351 



New Species of injurious Spider Mites .. .. .. .. .. 354 



The Taxonomic Value of Larval Characters in Tachinid Parasites . . . . 354 



A Review of Vine Pests . . . . . . . . . . . . . . . . 364 



The Diseases and Pests of the Rubber Tree {Review) . . . . . . 368 



Chalcids of the Genus Otitesella and its Allies . . . . . . . . 369 



Protective Appliances for Use when Dusting with Poisons . . . . 370 



Soaps as Wetting Agents in Sprays . . . . . . . . . . . . 370 



Les Insectes et leurs D6gats {Review) . . . . . . . . . . . . 376 



A Revision of the Chalcids of the GenuS Chrysoplaiycerus . . . . . . 378 



The Preparation of Tobacco Sprays , . . . . . . . . . . . 384 



Mathematical Formulae to represent the Activities of Parasites . . . . 386 



An Apparatus for spraying Soil with Chloropicrin . . . . . . . . 386 



The Action of Arsenical Salts as Insecticides . . . . . . . . 386 



Keys to Aphids living on Graminaceous Plants . . . . . ■ . . 391 



Chalcidoid Parasites of Psyllids . . . . . . . . . . . . 391 



New Injurious Neotropical Weevils . . . . . . . . . . . . 391 



Legislation : Summary of Legislative Measures against Plant Pests in 



Western Australia . . . . . . . . . . . . . . • ■ 377 



Legislation : Against Stephanoderes hampei in French Colonies . . . • 369 



Legislation: Against Potato Nematode in Germany .. .. .. 371 



