IV CONTENTS. • 



Page. 



The management of Englemann spruce-alpine fir stands, Spencer 739 



Monterey pine, Larsen 739 



Eysenhardtia polystachya, source of lignum nephrlticum mexicanum, Safford. . . 740 



DISEASES OP PLANTS. 



The investigation of physiological plant diseases, Smith 740 



A new phase of the problem of physiological diseases of plants, Lipman 740 



Bactericidal products in healthy and diseased plants, I, Wagner 740 



[Adaptative specialization of vegetable parasites], Heske 740 



Disease resistance in plants, Appel 740 



Some problems of plant pathology in reference to transportation, Stevens 741 



Report of the division of botany, Giissow 741 



[Plant diseases in Southern Nigeria], Farquharson 741 



Two rust fungi from the Royal Botanic Garden, Edinburgh, Wilson 741 



Ustilago vaillantii on Chionodoxa lucillise, Davie and Wilson 742 



The crown gall of alfalfa, Wilson 742 



Gummosis of beets, Arnaud 742 



Late blight of celery, Rees 742 



A bacterial disease of lettuce. Brown 742 



Some diseases of potato. — IV, Late blight or Irish potato blight, Doidge 742 



Distribution and prevalence of three important sweet potato diseases, Harter. . 743 



New light on curly top of the sugar beet. Smith and Boncquet 743 



Sugar beet mosaic, Townsend 743 



Tobacco root rot observations, Barnet 744 



A serious new wheat rust in this country, Carleton 744 



Control of stinking smut of winter wheat with formaldehyde, Miiller and Molz . 744 



Role of sucking insects in dissemination of fire blight, Stewart and Leonard. . 744 



Three strawberry fungi which cause fruit rots, Stevens 744 



A nasturtium wilt caused by Bacterium solanacearum, Bryan 744 



Oak fungus or Armillaria mellea in connection with nursery stock, Home 744 



Oak mildew, Neger .^ 745 



Dry rot of telegraph poles, Havelik 745 



ECONOMIC ZOOLOGY — ENTOMOLOGY, 



Food habits and distribution of the Texas homed lizards, Winton 745 



Entomological yearbook. — Calendar for insect collectors, edited by Krancher. 745 



Report of the entomologist of Arizona for 1914, Morrill 745 



Report from the division of entomology for 1914, Hewitt 746 



Nematus erichsonii, Athalia spinarum, and Eylemyia antiqua, Levtejev 746 



Insect enemies of Sudan grass, Newell 746 



The insect enemies of the fig, Picard 747 



Development of Bacillus pestis in Cimex lectularius, Bacot 747 



Natural enemies of sugar beet leafhoppers in California, Hartung and Severin. 747 



Catalogue of recently described Coccidse, V. Sasscer 748 



Occurrence of an intermediate in Aphis pomi, Turner and Baker 748 



Further studies of the embryology of Toxoptera graminum, .PhilUps 748 



A catalogue of Portuguese aphidids, Tavares 748 



Ravages of the forleule {Panolis piniperda) in 1913, Nechleba 748 



Combating Euxoa segetum, Enildev 748 



The morphology and biology of Carpocapsa pomonella and C. funebrana 748 



Descriptions of new North American Microlepidoptera, Busck 748 



The losses to rm-al industries from malarial mosquitoes, Thibault, Jr 749 



Occurrence of Aedes calopus {Stegomyia fasdata) in Russia, Marzinowsky 749 



Notes on two parasitic Diptera, Gahan 749 



Medullary spots and their cause, Grossenbacher 749 



Length of time that fleas are able to reinfect with plague, Bacot 749 



Fleas found on rats and other rodents Living with man, Bacot et al 749 



Descriptions of Braconidae, Rohwer 749 



Note on Bracon sp., a parasite of the cotton bollworm, Willcocks 750 



The white grubs of sugar cane in Queensland, Girault 750 



The date stone beetle, Willcocks 750 



Parasitic and other nematodes biologically associated with bark beetles, Fuchs. 750 



Two blossom weevils {Anthonomus pomonim and A. rubi), TuUgrcn 750 



A hymenopteran parasitizing the oothecse of a blattid, Alfieri 750 



The North American fever tick: Notes on life history, Cotton 750 



