IV CONTENTS. . [Vol. 41 



FOBESTBY. 



Page. 



A national lumber and forest policy, Graves 149 



Vacation days in the Battlement National Forest 149 



Report of the superintendent of forestry, Judd 149 



Report of the forest nurseryman, Haughs 150 



Report on forest administration in Bengal 1916-17, Farrington 150 



Forest administration in Northwest Frontier Province for 1917-18, Par- 



nell 150 



Forest administration in Bihar and Orissa for 1917-18, Trafford 150 



The resources of our colonial forests, Boutteville 150 



Official note on the colonial woods 150 



Selection and thinning, Rutgers 150 



The structure of the lactiferous vessel system of Hevea, Arisz 150 



The effect of time intervals in rubber tapping, Peteh 151 



Influence of a change in tapping surface on latex and rubber, de Vries 151 



Rubber tapping experiments: Two cuts v. one cut, Petch 151 



Latex and rubber from upper and lower cut, de Vries 1 152 



DISEASES OF PLANTS. 



Physiological specialization of parasitic fungi, Reed 152 



Studies in the genus Gymnosporangium, I, Dodge 152 



Obtaining abundant sporulation in Macrosporium solani, Kunkel 152 



Notes on methods and terms employed in studying the Uredinales, Rosen 152 



The Uredinales of Oregon, Jackson 152 



The relations of crown gall to otlier overgrowths in plants. Smith 152 



An automatic spore trap, Fromme 153 



[Plant diseases and treatments], Waterbury 153 



Report of the division of plant pathology, Carpenter 153 



Pathological laboratory [notes] 154 



Pathological problems in distribution of perishable plant products. Shear 154 



Seed disinfection by formaldehyde vapor, Thomas 154 



An epidemic of corn smut following hail, MacMillan 154 



Varietal susceptibility of beans to Colletotrichum lindetnuthianum, Barrus 154 



Varieties of beans susceptible to mosaic, Reddick and Stewart 155 



A storage fermentation of dasheens, Wilson 155 



Ramularia root rots of ginseng, Zinssmeister 155 



Diseases of parsnips. Cotton 155 



Potato leaf roll : Its diagnosis and cause, Wortley 155 



Two tomato diseases, Reynolds 156 



Tomato wilt 156 



The origin and spread of tomato fruit rots in transit, Rosenbaum 156 



An apple canker due to Cytospora, Stevens 156 



Peach diseases, Manns 157 



Wood rots of peach by Coriolus proHficans and C. versicolor, Elliott 157 



A Sterigmatocystis smut of figs, Hodgson 157 



Early occurrence of citrus scab in Japan, Lee 157 



Problem of imported plant disease as illustrated by blister rust. Metcalf_ 158 



The overwintering of Cronartium ribicola on Ribes, YorC and Spaulding_ 158 



Overwintering of the seciospores of Cronartium- ribicola, Dosdall 158 



ECONOMIC ZOOLOGY — ENTOMOLOGY. 



Report of State entomologist of Connecticut for 1918, Britton 158 



[Insect notes] 159 



Thirty-third report of State entomologist of New York, 1917, Felt 159 



[Experimental entomological work], Waterbury 160 



Insects injurious to the hop in New York, Hawley 160 



The Ohio wheat survey, Gossard and Parks 162 



Insects in relation to wbeat flour and wheat flour substitutes. Chapman — 162 



New phases of the entomology of disease, hygiene, and sanitation, Pierce. 162 



Grasshopper control in Indiana, Davis 162 



The meadow plant bug, Osborn 162 



Kerosene emulsion v. nicotin solution for potato aphid, Britton and Zappe 162 



Life history and habits of the mealy plum aphis, Davidson 163 



Seventeen-year locusts due in western Ohio. Gossard 163 



An European scale insect becoming a menace in Pennsylvania, Sanders__ 164 



