CONTENTS— con/. pao« 



New Guinea : Measures against Coconut Pests . . . . . . . . 107 



New Zealand : The Utilisation of Cattle against Grass Grubs . . . . 106 



Palestine : Measures against Locusts . . . . . . . . . . 107 



Samoa: Report on Plant Protection . . .. : 108 



Spain : The Problem of PA>'//o;verfl in Vineyards . ; 133 



Switzerland : Forficula auricularia as a Pest of Pear-trees . . . . 135 



Switzerland : Stenolechia gemmella, a Microlepidoptftron injurious to 



Oaks 136 



Switzerland : The Association of Bark-beetles with Fungi in Fruit-trees 136 

 Tripoli : Notes on Cotton Pests . . . . . . . . . . . . 139 



U.S.A. : Pests of the Almond in California . . . . . . . . . . 97 



U.S.A. : Parasites of Mealy Bugs in California . . . . . . . . 100 



U.S.A. : The Aphididae of California 101, 102 



U.S.A. : Notes on Beneficial Coccinellids in California . . . . . . 101 



U.S.A. : Studies on the Parasites of the Termites . . . . . . . . 102 



U.S.A. : The Ribbed Pine-Borer, Rhagium lineatum, in New York . . 102 

 U.S.A. : Precautions against imported Pests in Florida . . . . . . 103 



U.S.A. : The Bionomics and Control of Chrysomphalus dictyospermi in 



Florida 104 



U.S.A. : The Yam Weevil intercepted in Florida . . . . . . . . 104 



U.S.A. : Insect Pests in North CaroUna in 1919 104 



U.S.A. : Insect Pests in Oklahoma in 1919 105 



U.S.A. : Empoasca malt as a Potato Pest . . . . . . . . . . 105 



U.S.A. : Insect Pests and their Control in 1919-20 HO 



U.S.A. : The Effect of Severe Cold on Insect Pests 114 



U.S.A. : The Importance of Applied and Commercial Entomology .. 115 

 U.S.A. : Methods of estimating the Value of Codhng Moth Treatments. . 115 

 U.S.A. : The Symbiosis of Blastophaga and Figs . . . . . . . . 115 



U.S.A. : Combating the Sugar Beet Webworm on a large Scale . . . . 116 



U.S.A. : Washing Experiments for Control of the European Elm Scale. . 117 

 U.S.A. : Daylight Orchard Fumigation with Hydrocyanic Gas . , . . 117 



U.S.A. : The Spread of Epilachna corrupta in Alabama . . . . . . 118 



U.S.A. : The Effect of Alabama argillacea on Boll Development and 



Cotton Yield 118 



U.S.A. : A Grasshopper predaceous on Lachnosterna . . . . . . 118 



U.S.A. : A Blossom-destro)dng Beetle on Mango and Avocado . . . . 118 



U.S.A. : A Dipterous Parasite of the Parsnip Webworm . . . . . . 118 



U.S.A. : A New Apple Pest in Pennsylvania. . .. .. .. ..119 



U.S.A. : Achatodes zeae not a Pest of Maize . . . . . . . . 119 



U.S.A. : Insect Pests in Arizona in 1918-19 119 



U.S.A.: New Predaceous and Parasitic Mites .. .. .. ..119 



U.S.A. : Sprays for Cydia pomonella in Washington . . 119, 120, 121 



U.S.A. : Measures against Grasshoppers on Vegetables . . . . . . 121 



U.S.A. : Notes on the Working of the Federal Plant Quarantine Act . . 126 

 U.S.A. : The European Corn Borer Situation . . . . . . . . 132 



U.S.A. : Dusting Experiments against Fruit Pests in Delaware . . 134, 135 

 U.S.A. : A New Aphid injurious to Plum Trees . . . . . . . . 136 



U.S.A. : A Review of State Quarantine Regulations 136 



U.S.A. : Measures against the Pink Bollworm 143 



West Indies : The Discovery of the Pink Bollworm and Measures 



against it . . . . . . . . . . . • • • • • • • 99 



West Indies : The Transmission of Mosaic Disease of Sugar-cane by 



Aphids 100 



West Indies : Pests of Sugar-cane in Barbados . . . . . . . . 105 



Transference of Beneficial Nematodes for Economic Purposes . . . . 97 



New Species of Tropical Fruit-boring Flies . . • . . . . . . . 97 



The Protection of Timber from Termites . . . . . . . . . . 106 



Plant Pests in the Tropics . . . . . . . . . . . . . . 107 



The Causes of Bud-rot in Coconuts . . . . . . . . . . . . 108 



Chloropicijn as a Fumigant . . . . . . . . . . . . . . 108 



Notes on Petroleum Insecticides .. .. .. .. .. ..114 



Hopkins' Bioclimatic Law . . . . . . . . . . . . . . 126 



The Influence of Hydrocyanic Acid Gas on Seed Germination . . . . 139 



The Value to Agriculture of the Study of Parasites of Insects . . . . 140 



