1917] CONTENTS. V 



Page, 



Some Septorias of wheat, Grove 149 



Smut of wheat, Devoto 149 



Some bacterial diseases of vegetables found in Ontario, Jones 149 



Club root of crucifers and its control, Werth 150 



A new host of Ascochyta hortorum, Gabotto 150 



Controlling cabbage yellows, Green and Humbert. 150 



Potato diseases, Heald 150 



Important potato diseases and their control, Schander 150 



Osmotic pressure of cell sap in relation to mosaic disease, Sprecher 150 



Tomato fruit diseases, Waters 150 



Manual of fruit diseases, Hesler and Whetzel 151 



Bitter pit, McAlpine 151 



The Illinois canker, or the blister canker of the apple tree, Lewis 151 



Apparent relation between aphids and fire blight, Merrill 151 



Ripe rot of stone fruits, Mansfield 151 



Grape downy mildew in Algarve, Judice ._ 151 



Vine mildew in Piedmont, Italy, in 1915, Martinotti 152 



Treatment of downy mildew, Convergne and Trouchaud-Verdier 152 



Treatment of O'ldiuJn, Capus 152 



Fog and grape diseases, Larue 152 



[Treatments for grape troubles], Causse 152 



The effect of asphyxiating gases on grapevines at the battle front, Viala 153 



The effects of asphyxiating gas on vines, Cordonnier and Richez-Pechon 153 



Effects of gases from aeroplane bombs, Cordpnnier 153 



Citrus blast, a new disease in California, Coit 153 



Citrus blast, a new disease, Hodgson 4. 153 



A new bacterial citrus disease, Lee 154 



The cause of June drop of navel oranges, Coit and Hodgson 154 



Spraying for ripe rot of the plantain fruit, Dastur 154 



[Notes on some pineapple diseases], Johnson 155 



Rusts of cultivated trees and their treatment with lime-sulphur, Savastano. . . 155 



Carnation leaf spot in Italy, Turconi 155 



Sweet-pea diseases and their control, Taiibenhaus 155 



Oak mildew, Schoevers 155 



White pine blister rust. Duff 155 



ECONOMIC ZOOLOGY — ENTOMOLOGY. 



Animal micrology, Guyer. . . — . — 155 



Notes on some animal parasites in British Guiana, Bodkin and Cleare, jr 155 



More minor horrors, Shipley 156 



The domesticated silver fox, Dearborn. . . 156 



Habits and food of the roadrunner in California, Br>'ant. 156 



Insert behavior as a factor in applied entomology, Hewitt 156 



Theories of hibernation, Rasmussen 156 



Simple apparatus for insect photography, Walden. 156 



Eighth annual report of Quebec Society for Protection of Plants, 1915-16 156 



The principal insect pests and plant diseases, Huard 157 



Garden and truck crop insect pests, Sanborn 157 



Potato insects, Yothers 157 



South American crickets, Gryllotalpoidea and Achetoidea, Bruner 157 



Notes on black apple leaf hopper (Idioarusfitchi), Brittain and Saunders 157 



Additions to the list of Missouri Cicadellidae, Gibson 157 



Three new species of Jassoidea from Missouri, Gibson 157 



The bay flea louse, Trioza alacris, as a new pest in New Jersey, Weiss 157 



Relation between aphids and fire blight {Bacillus amylovorus), Merrill 157 



Synopsis of the genus Saltusaphis, Baker 157 



The California species of Myzus, with description of a new species, Shinji 158 



Mealy bug control, Woglum 158 



A list of the Coccidse of Porto Rico, Jones 158 



A new scale insect affecting sugar cane in New Guinea, Rutherford 158 



The development of the silk glands in the chief races of silkworms, Bucci 158 



Genetic studies on the silkworm, Tanaka 158 



The Lepidoptera of the Isle of Pines, Holland 158 



Hyponomeuta species and their control in Sweden, Tullgren 158 



An outbreak of the eight-spotted forester in New Haven, Conn., Lowry 158 



Notes on the peach-tree borer {Sanrwioidea exitiosa), Becker 158 



