IV CONTENTS. 



Page. 



The influence of forest cover on the temperature of the soil, Cuif 44 



InvoHtigations on the pruning of forest trees, Zederbauer 44 



Sil vi.al leaflets 44 



The natural pine forests on the Ulea River, North Central Finland, Trice 45 



Experiment with seed of riiiiis s/ilrentrin, Story 45 



Connnercial importance of the White Mountain forests, Ayres 45 



Forest conditions in the Crow's Nest Valley, Alberta, Macmillan 45 



The forest trees of Canada 45 



Kejjort of the superintendent of forestry, Campbell 45 



Resistant eucalypts for planting in southern Arizona, Thornber 45 



[Rubber investigations at the Hawaii Station], Wilcox 45 



[Pot experiments with fertilizers for rul)ber], Tiionipson 46 



Caoutchouc and gutta-percha in the Dutch East Indies 46 



Ecanda rubber {Raphionacme utilis) 46 



DISEASES OF PLANTS. 



The development of disease-resistant plants. Reed 46 



Some plant bacterial diseases, Sackett 46 



Plant diseases, Collens 47 



The life history of the cedar rust fungus, Heald 47 



Influence of chemical stimulation upon Melanosporapampeana, Heald and Pool. 48 



The life history and parasitism of Diplodia ze:e, Heald, Wilcox, and Pool 48 



Investigations on the combating of barley snmts, Appel 48 



The rust of wheat, Vernet 49 



Fungus maladies of the sugar cane, Cobb 49 



The root rot of tobacco caused by Thielavia basicola, Gilbert 49 



Cucumber and tomato canker, Massee 50 



The gummosis of fruit trees, Blin 50 



Spraying for apple scab or black spot, Mally 50 



The control of black rot of the grape. Shear, Miles, and Hawkins 50 



Coffee diseases of the New World, Massee 51 



Notes on the Hemileia disease of coffee, Von Faber 51 



Mulberry diseases, Butler 51 



The white-pine blister rust, Pettis 52 



Note on the biology of Pesialozzia hartigii, Fischer 52 



Fomes lucidua, a suspected parasite, Butler 52 



Wood-destroying fungi, Schorstein 52 



Some common ])lant diseases, McCallum 53 



Directions for the control of Nebraska plant diseases, Wilcox and Stone 53 



ECONOMIC ZOOLOGY — ENTOMOLOGY. 



Biological investigations in Alaska and Yukon Territory, Osgood 53 



The rabbits of North America, Nelson 53 



[The introduction of the American robin into England] 53 



Index-catalogue of medical and veterinary zoology, Stiles and Hassall 53 



Zoological yearbook, 1908, Mayer 53 



Our insect friends and enemies. Smith 53 



The role of air in the ecdysis of insects, Knab 54 



Contribution to the biology of the Aphididse, Mordwilko 54 



Contributions to experimental entomology, Reiff 54 



Notes on microlepidoptera, with descriptions of new species, Busck 54 



First report on suppressing the gipsy and brown-tail moths, Kirkland 55 



Second report on suppressing the gipsy and brown-tail moths, Kirkland 55 



Third report on suppressing the gipsy and brown-tail moths, Kirkland. 55 



The Angoumois grain moth, Symons 55 



Mosquitoes of Brazil, Peryassu 55 



Chemical observations with the meat fly Calliphora, AVeinland 55 



Further observations on the developmentof trypanosomes in Glossinse, Kleine. 55 



Further investigations on the etiology of sleeping sickness, Kleine 56 



Siphonaptera observed in the plague campaign in California, McCoy 56 



The Colorado potato beetle in Virginia in 1908, Popenoe 56 



The blue-green beetle, Houser 57 



Notes on some of the Eucnemidse of the Eastern States, Van Horn 57 



Some species of Calligrapha, Knab 57 



The sweet-potato weevil ..- 57 



