CONTENTS. V 



Page. 



Control of loose smut of wheat and of barley, Appel and Riehm 546 



Cabbage disease in Langendijk, Ritzema Bos and Quanjer 546 



The brunissure of cotton in Algeria, Maige and Nicolas 546 



Control of blackleg disease of the potato, Morse 546 



On tumor and canker in potato, Home 547 



Bacterial fibrovascular disease and leaf-roll disease of potato, Spieckermann.. 547 



The leaf-roll disease. — II, The oxidases of resting and sprouted tubers, Doby.. 547 



Protection of tubers by spraying with Bordeaux mixture, Quanjer 548 



Heterosporium variabile, Reed and Cooley 548 



Blight of the sugar beet and protection therefrom, Hegyi 548 



The red rot of sugar cane, Edgerton 548 



Notes on tomato diseases with results of selection for resistance, Essary 549 



Diseases of citrus fruits, Rolfs, Fawcett, and Floyd 549 



Blemishes of citrus fruits, Coit 549 



A Loranthus affecting citrus trees 549 



Method of infection of grape leaves by Plasmopara viticola, Ravaz and Verge. . 550 



The develoijment and treatment of downy mildew of grapes, Faes 550 



Simultaneous occurrence of mildew in distant localities, Capus and Bailly. . . . 550 



A study of roncet of the grape, Averna-Sacca 550 



Diseases of the prickly pear, Tryon 551 



The chestnut-bark disease, Rane 551 



The fate of the chestnut tree, Hitler 551 



Notes on the oak Oidium in France, Arnaud and Foex 551 



Expert opinion on dry rot, Wehmer 551 



A disease of sweet peas, asters, and other plants, Massee 551 



On the biology of the anther smut of Melandrium album, Werth 552 



Parasitic bacteria on leaves of Elodea, Merker 552 



ECONOMIC ZOOLOGY — ENTOMOLOGY. 



Economics of ornithology in South Africa, Roberts 552 



Conifers damaged by squirrels. Hill 552 



Nomenclature of economic insects, Lefroy 552 



Our insect friends and foes, Duncan 552 



The principal insects injurious to agriculture during 1908-9, Swenk 553 



Insect pests 553 



Injurious insects and other animals observed in Ireland during 1910, Carpenter 553 



Report of the Government entomologist, Green 553 



A bacterial epizootic among locusts in Mexico, D'Herelle 553 



Some new California and Georgia Thysanoptera, Jones 553 



Tetrastichus gentilei and its relation to the olive Phlceothrips, Del Guercio 553 



On a new species of Phloeothripidse of Japan, Okamoto 553 



The red or orange scale {Chrysomphalus aurantii), Quayle 553 



The black scale (Saissetia olese), Quayle and Rust 554 



Parasitism of the black scale 556 



Locomotion and length of life of young of Pulvinaria vitis ribesise, Collinge. . . . 556 



Bird enemies of the Chinese cotton scale, Arnold. . 556 



Preliminary note on the silk glands of Bomhyx mori, Tanaka 556 



Studies on the anatomy and physiology of the silk-producing insects, Tanaka . 556 



The leopard moth (Zeuzera pyrina), Britton and Cromie 556 



A parasite of the eggs of the cochylis and eudemis moths, Marchal and Feytaud . 557 



The plum leaf-miner (Nepticula sling erlandella), Crosby 557 



The structure of certain dipterous larvae in human foods. Banks 558 



The cheromyias, new Diptera with larvae which suck blood, Roubaud 559 



Systematic studies of the hematophagous Muscidse of the genus Lj'perosia, Bezzi 559 



Mosquito sucked by a midge, Gravely 559 



Some experiments on larvicides, Ross and Edie 559 



A catalogue of the Coleoptera 560 



Two apple-tree borers, Wilson 560 



The dying hickory trees: Cause and remedy, Hopkins 560 



The occurrence of Necrobia and Dermestes in cotton bales, Mangan 560 



The tobacco beetle and a method for its control (Lasiodervia sp.), Mackie 560 



The bark beetles of northern and central Japan, Niisima 560 



Insect damage to standing timber in the national parks, Hopkins 560 



