19191 CONTENTS. V 



Page. 



[Botany and phytopathology, Canada], Crerar 655 



Plant diseases [in Ireland] 655 



List of diseases of economic plants in Bombay Presidency, Chibber 655 



Foot and stalk disease of wheat, Foex 655 



The black stem rust and the barberry, Stakman 655 



Immunity and inheritance in plants, McAlpine 656 



A little known disease of alfalfa, Fron and Lasnier 656 



The secial stage of alsike clover rust, Davis 656 



Diseases of the potato, Heald 656 



Potato leaf roll, Blanchard and Perret 656 



Potato spraying trials in the Cambridgeshire Fens, 1918, Petherbridge — 656 



Bacterial blight of soy bean, Tisdale 656 



A disease of tomato and other plants, Pethybridge and Lafferty 656 



Dry-rot of turnips. — Suggestions regarding control, Cockayne 657 



Orchard experimental work by Stoke Fruitgrowers' Association 657 



Treatment of apple canker diseases, Whitten 657 



Apple powdery mildew a serious menace to orchards, Fisher 657 



Apple scab and its control, Eastham 658 



A new and effective disinfectant for pear blight, Reimer 658 



June drop and its relation to the weather, Jensen 658 



Psorosis (scaly bark) of orange ti-ees in California, Fawcett 658 



On the life history of the rose blotch fungus, Alcock 658 



Fomes lucidus as a parasite of trees, Nowell 658 



Control of oak mildew, van Poeteren 659 



Pine rust in Sweden, 1917, Sylvan 659 



Pine rust {Melampsora pmitorqua), Sylvan 659 



[Pine rust in Sweden], Sylven 659 



Summary of the white pine blister rust situation, Metcalf 659 



Further notes on black-stripe canker, Belgrave 659 



Field notes and observations on brown bast, Belgrave and South 659 



Experiments on the prevention of brown bast, Belgrave 659 



A study of He*erodera radicicola and its control, Duruz 660 



ECONOMIC ZOOLOGY — ENTOMOLOGY. 



Federal protection of migratory birds, Lawyer . 660 



Life histories of North American diving birds. — Order Pygopodes, Bent 660 



Report of the entomologist, Pettit 660 



Entomology 660 



Report of the division of entomology, Sherman 660 



Notes on some insect pests of Costa Rica, Zetek 660 



[Contributions on economic Insects] 660 



Insect pests on the rosella, Jarvis 661 



Common insecticides. — Their practical value, Wilson 661 



Derris as an insecticide, Mclndoo, Sievers, and Abbott 661 



Economic poisons used in control of pests in California, Gray 662 



Locust destruction 662 



The Coccobadllus acidiomm of d'Herelle, Quiroga 662 



Does Bordeaux mixture repel the potato leaf-hopper? Fluke 662 



The life history and biology of Macrosiphum solanifolii. Smith 662 



The durra asal fly (Aphis sorghi) in Anglo-Egyptian Sudan, King 664 



Controlling mealy bugs by their natural enemies, Armitage 664 



A new scale insect {Xylococcus alni) on alder, Oguma 664 



New studies and observations of Argentine Pieridse, Giacomelli 665 



Ear worm injuries to corn and resulting losses, Smith 665 



Status of codling moth in its relation to walnut industry, Mackie 665 



Notes on lepidopterous borers found in plants, Mosher 665 



Notes on life history of pine tube moth {Eiilia pinatubana), Hartzell 665 



What hinders dried fruit sales? de Ong 665 



Observations on the food of Anopheles larvae, Metz 665 



Some aspects of malaria control through mosquito eradication, Metz 666 



Infection of A. plumbeus with Plasmodium vivax, Blacklock and Carter- 666 



Variations in length of flaxseed stage of Hessian fly, McCoUoch 666 



