CONTENTS. 



Structure and life of spruce roots and influence of cultural practices, Matthes. . 645 



Tapping experiments with Kickxia elastica, Zimmermann 645 



Para rubber (Hevea brasiliensis) in Southern Nigeria 646 



The rubber of Mascarenhasia elastica 646 



Third biennial report of the state forester of California, Homans 646 



Report of the state foreeter of Wisconsin for 1909-10, Griffith 646 



Report of director of forestry of Philippine Islands for 1910, Ahern 646 



Official proceedings of division of forestiy of Royal Prussian Ministry, 1909 646 



Forestry, Wells 646 



Publications of the Forest Service 646 



DISEASES OF PLANTS. 



Report of the vegetable pathologist, McAlpine 647 



Report on pests and diseases in West Indies, 1909-10. — I, South 647 



The genus Fusarium, Appel and AVollenweber 647 



The genus Uromyces, II, Sydow 647 



Morphology and physiology of development of Pestalozzia palmarum, Leininger . 647 



A new host for Claviceps, Groh 647 



Experiments in breeding smut-resistant varieties of barley, Broili 647 



Wart disease of potatoes {Synchitrium endohioticum) , Malthouse 648 



A bacterial disease of potato and tomato, Bancroft 648 



Leaf-splitting disease of sugar cane (gele strepenziekte), Wilbrink and Ledeboer . 648 



A bacterial disease of swedes, Priestley and Lechmere 648 



On the mosaic disease of tobacco, Lodewijks, jr 648 



Gooseberry mildew in Cambridgeshire 648 



Cicinnobolus as a parasite on Sphaeroiheca mors uvse, Oberstein 649 



Bacterial gummosis and court-noue in the vineyards of Mendoza, Alazraqui. . . 649 



Intensity of culture and California vine disease in Italian \-ineyards, Pugliese. . 649 



Combined treatment for the Oidium, grape mildew, and Botrytis, Zacharewicz. . 649 



Experiments in treatment of grapevine mildew in Bombay Presidency, Burns. . 649 



The fight against the mildew in Anjou, Maisonneuve 649 



On the treatment of mildew, Gagnaii-e 650 



The physical properties of the grape and resistance to the mildew, Laurent 650 



A new disease of the mulberry, Bubak 650 



The diseases of the orange, Gdndara 650 



Treatment of gum disease. Call 650 



Diseases of the areca palm. — I, Koleroga or rot-disease, Coleman 650 



The fungus causing the dieback disease of cacao and Para rubber, Bancroft 651 



On the formation of diseased heartwood, Miinch 651 



The oak Oidium on the chestnut and beech, Farneti 652 



The black canker of the chestnut, Griffon and Maublanc 652 



A new polypore on incense cedar, Hedgcock 652 



The death of fir seedlings from Rhizina undulata, Eulef eld 652 



The dying of pine trees, von Tubeuf 652 



A new leaf disease of the pine (Pinus sylvestris), Miinch and von Tubeuf 652 



Witches brooms and branch knots of the stone pine. — II, Twig galls, von Tubeuf. 652 



Rust of Tsuga canadensis, Spaulding 652 



A new Taphrina on Polysiichum lonchitis, Herzfeld 652 



The fungicidal properties of liver of sulphur, Foreman 653 



A chapter on lime-sulphur sprays 653 



Lime-sulphur sprays, Barsacq 653 



ECONOMIC ZOOLOGY — ENTOMOLOGY. 



Annual report of the governor of Alaska on the Alaska game law, 1910, Clark. . 653 



The orders of mammals, Gregory 653 



The birds of Illinois and Wisconsin, Cory 654 



A systematic and descriptive catalogue of the birds of Argentina, Dabbene 654 



The echinostomids parasitic in birds, Dietz 654 



Index-catalogue of medical and veterinary zoology, Stiles and Hassall 654 



Third annual report of the state entomologist of Indiana, Douglass 654 



Report of the state entomologist [of Maine], Hitchings 654 



Report of the entomologist [of Nebraska for 1909], Bruner 654 



First report on economic biology, CoUinge 654 



Notes on various truck-crop insects, Chittenden. 655 



