CONTENTS— conf. 



Potato Pests in Canada 



Experiments with Cutworm Baits in Indiana 



The Early Stages of Empoasca trifasciata in New Jersey 



A List of the Cerambycidae of California 



Notes on the White- marked Tussock Moth in Quebec 



Physical Properties governing the Efficacy of Contact Insecticides 



The Bionomics of Nysius ericae, the False Chinch Bug, in U.S. A 



The Bionomics of Aphis bakeri in Idaho 



Sprays for San Jo86 Scale in Idaho 



The Establishment of Beneficial Parasites in Hawaii 



Pests of Plum-Trees in Northern Africa 



Oeroplastes ruhens, a Pest of Citrvis in Japan . . 



An Apparatus for the Preservation of the Egg-Parasites of the 



Rice-borer in Japan 

 Insect Pests of Bamboo in Formosa . . 

 Chalcids infesting the Seeds of Conifers in Japan . . 

 Nephopteryx ruhrisonella, a Pest of Pears in Japan . . 

 Methods of destroying Camponotus rufipes in Brazil 

 Insect Pests in Germany in 1915 . . . . 



Applied Forest Entomology in Austria 

 The Biological Method of Combating Plant Pests in Austria 

 Pests of Vegetables in Germany 

 The Classification of Gall-forming Mites 

 A New Gall- mite in Java 

 Remedies for Eriosoma lanujerum in Austria 

 New Chalcids infesting the ISeeds of Conifers in Austria 

 Observations on the Maize Moth, Pyrausta nuUlaUs, in Hungary 

 Lepidopterous Pests of Cotomaster in Hungary 

 Cutworms infesting Vineyards in Austria 

 The Occurrence of Agrotis c-nigrum in Silesia 

 An Outbreak of DendroUmus pini in Prussia 

 Aporia crataegi in Rumania 

 A Note on Hylurgus piniperda in Bohemia . . 

 Remedies for the Asparagus Beetle in Austria 

 Bark Beetles in Coniferous Forests in Bosnia 

 An Outbreak of CepJialeia abietis in Germany 

 Stroiigylog aster cingulatus infesting Pine Trees in Germany 

 The Economic Importance of Ants in Germany 

 Insects damaging Fruit-trees in France 

 Insect Pests in Ontario in 1917 

 A New Species of Eleodes in U.S.A. 

 Miscellaneous Insect Pests in U.S.A. . . 

 Haltica ampelophaga infesting Vineyards in Spain . . 

 Insect Pests in Spain 



An Organised Campaign against Pieris in Switzerland 

 Cherry Fruit Flies and their Control in Canada 

 Observations on a Fungus Enemy of the Walnut Aphis in Southern 



Cahfornia 

 The Alternation of Hosts among Economic Aphids in U.S.. 

 Experiments in Cyanide Fumigation under Tents in U.S. A 

 Notes on the Boet Leafhopx)er,. Eutettix tenella, in California 

 The Control of Insects in Stored Foods in California 

 The Time Factor in Fumigation with Hydrocyanic Acid Gas 

 A Native Food-plant of Bhagoletis fcmsta in -North America 

 Aphis bakeri and its Allies in U.S.A. . . 

 Notes on some Borers of the Genus Buprestis in U.S.A. 

 The Presence of Forficula auricularia in U.S.A. 

 Nicotine Oleace, a Promising New Contact Insecticide 

 Experiments with Oils for trapping Trypetidae and Ortalidae 



in Cahfornia 

 The Food-plants of Bhagoletis pomonella in the U.S.A. 

 The Raspberry and Loganberry Beetle, Byturus tomentosus, and its 



Control in Britain . . 



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