CONTENTS— con(. 



U.S.A. : A New Matsuecocus on Piues in California. . 



U.S.A.: New Species of O^it/s . . 



U.S.A. : The Importance of Federal Quarantine Measures. 



U.S.A. ; Interstate Quarantine against the Alfalfa Weevil . 



U.S.A. : Measures against the Alfalfa Weevil in Utah 



U.S.A. : The Successful Extermination of Pectinophora gossypiella 



in Texas 

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

 U.S.A. : The Bionomics of Pyrmista penitalis infesting Water-lilies 

 U.S.A. : Insect Pests in 1917-18 in Kansas . . 

 U.S.A. : Plant Pest Legislation in Kansas . . 

 U.S.A.: Garden Pests in Ohio . . 

 U.S.A. : Tinea cloacella bred from Fungi 

 U.S.A. : The Hymenopterous Parasites of Kermes 

 U.S.A. : Legislation against Plant Pests in Colorado 

 U.S.A. : The Bionomics and Synonomy of the Aphids infesting 



Apple 

 U.S.A. : Insect Pests in 1918 in Alabama , . 

 U.S.A. : Insect Pests in 1918 in Indiana 

 U.S.A. : The Bionomics of Galleria mellonella in Texas . . 

 U.S.A. : Measures against the Gipsy Moth in Massachusetts 

 U.S.A. : Sprays for Aphis pomi in New York 

 U.S.A. ; Experiments m destroying Aphid Eggs 

 U.S.A. : An Injurious Leaf-miner of Honeysuckle . . 

 U.S.A. ; Notes on the P\ipae of Pyrawsta nubilalis and P. penitalis 

 U.S.A. : The Hibernation of Cooomellids 

 U.S.A. : Xanthoma villosula injuring Forest Trees in New York 

 U.S.A. : An imported Moth infesting Stored Peanuts 

 U.S.A. : Paratetranychus pilosus attacking Apple Foliage. . 

 U.S.A. : The Spread of Pyransta nubilalis . . 

 U.S.A. : Notes on Bark-beetles of the Genus Pityophthorus 

 West Indies ; Insect Pests in the Virgin Islands m 1918-19 

 The Economic Importance of Aphids . . 

 Present Day Problems in Entomology. . 

 The Transmission of Plant Diseases by Insects 

 The Early History of Entomology 

 Notes on Weevils of the Genus Aorus , . 

 The Adulteration of Insect Powder with Powdered Daisy Flowers . 

 The Influence of Migration on the Distribution of Insect Pests 

 A Useful Breeding Cage. , 

 Notes on the Classification of Aphids . . 

 Citrus Fumigation with Liquid Hydrocyanic Acid . , 



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