CONTENTS— COM*. 



PAGB 



France : The Cultivation and Utilisation of Pyrethrum . . , . 554, 573, 574 



France : The Utilisation of Trap Trees for Bark-beetles . . . . . . 555 



France ; A Paint for Use against Phylloxera . . . . . . . . 566 



France : Coleopterous Fests of imported Timber . . . . . . . . 574 



France : Mealy-bugs and Sooty Fungus on Vines . . . . . . 582 



Germany : A Coleopterous Pest of Orchids . . . . . . . . 546 



Germany : The Feeding Habits of Zabrus gibbus . . . . . . . . 551 



Germany : Acantholyda stellata in Bavarian Forests . . . . . . 559 



Germany : The Biology of Habrobracon brevicornis . . . . . . 566 



Germany : A Mite infesting Tenebrio molitor . . . . . . . . 567 



Germany : The Biology and Control of the Beet Nematode . . . . 568 



Germany : The Occurrence of Two Generations in Cabbage Flea-beetles 569 

 Germany : Notes on the Beet Fly, Pegomyia hyoscyami . . . . . . 569 



Germany : Important Forest Insects {Review) . . . . . . 569, 570 



Germany : Capsid Bugs injurious to Fruit. . . . . . . . . . 583 



Germany : An Apparatus for catching Beetles in Willow Plantations 



Guiana, British : Miscellaneous Pests in 1920 



Holland : A Note on Habrobracon brevicornis 



India : New Scolytids 



India : The Food-plants of Forest Insects . . 



India ; Chalcid Parasites of Forest Pests . . 



Italy: The Argentine Ant Problem. . 



Japan : Studies on the Peach Sawfly 



Japan : The Occurrence of Potato Leaf-roll Disease 



Malaya : Notes on Miscellaneous Pests 



New Zealand : Notes on Insect-infesting Fungi . . 



New Zealand : The Breeding and Distribution of Aphelinus mali 



Panama : The Red Ring Disease of Coconut Palms 



Panama : The Use of Carbon Bisulphide against Insects . . 



Russia: Dates for sowing Cereals against OscweWa/ni .. 



Russia : Experiments with Poisons against Locusts 



Russia : Notes on the Larvae of Dociosiaurus maroccanus 



Seychelles : Legislation against Plant Pests 



Spain : A Campaign against Dociosiaurus maroccanus 



Spain : The Occurrence of Helerodera radicicola . . 



Switzerland : The Phylloxera Problem 



Switzerland : A Plea for the better Organisation of Economic Ento 



mology 

 Switzerland : Insect Pests of Pinus strobus 



U.S.A. : Wood-boring Beetles of the Genus Agrilus in New Jersey 

 U.S.A. : Mango Pests in Florida 

 U.S.A. : Disinfecting Cotton Seed to prevent the Spread of the Pink 



BoUworm . . 

 U.S.A. : A new Lepidopterous Enemy of Yellow Pine in Oregon. . 

 U.S.A. : Notes on the Periodical Cicada . . 

 U.S.A. : Tylenchus dipsaci on Lucerne in Oregon . . 

 U.S.A. : The Transmission of Celery Mosaic by Aphids . . 



U.S.A. : The Aetiology of Potato Tip Bum 



U.S.A. : Control of Melon Aphids in Ohio . . 



U.S.A. : The Use of Aeroplanes in Dusting Tall Trees 



U.S.A. : Dusting Vegetable Crops in Virginia 



U.S.A. : The Oriental Fruit Moth in Virginia 



U.S.A. : Insect Pests of Vegetable Crops in Ohio . . 



U.S.A. : Notes on the Feeding Period of Melanoplus femur-rubrum 



U.S.A. : Insect Pests in Virginia in 1920-21 



U.S.A. : The Bionomics of the Woolly Aphis in Virginia . . 



West Indies : Insect Pests in Antigua in 1920-21 



The Hopkins Bioclimatic Law 



A Bibliography of the Plant Protection Literature in 1921 



A Note on Pantomorus godmani 



Insects as Disseminators of Plant Diseases 



Fertilisation in Ephestia kuhniella 



The Anatomy and Classification of Nematodes 



Studies on the Anatomy of Coccids . . 



A Summary of Knowledge concerning Termites 



Forest Lepidoptera {Reviews). . 



A Plague of Necrobia rufipes on Board Ship 



Oleoresins as Insecticides 



Legislation : Against Plant Pests in Seychelles 



584 

 561 

 573 

 542 

 565 

 573 

 558 

 558 

 558 

 557 

 542 

 575 

 581 

 582 

 546 

 546, 547 

 547 

 576 

 559 

 583 

 537 



553 

 556 

 538 

 538 



539 

 543 

 543 

 544 

 544 

 544 

 548 

 548 

 559 

 560 

 560 

 579 

 579 

 580 

 554 

 540 

 540 

 540. 541 



544, 545 

 545 



545, 546 

 545 

 570 



569, 570 

 573 

 582 

 576 



