IV CONTEXTS. [Vol.40 



FORESTRY. 



Page. 



National Forest areas 447 



Timber supplies and forestry in the Union, Legat 448 



Report on forest administration in Sou*h Australia, 1917-18, Gill 44S 



Effect of grazing upon aspen reproduction, Sampson 448 



Manuring of Hcvea bra/tiliensis, Anstead 44S 



Scientific principles of the budding of Hevca brasilicnsix. Bobilioff 44 s 



Structure, degeneration, and regeneration of latex rings. Keuchenius 44s 



Tapping on renewed bark, retch 44*. > 



The African oil palm, its possibilities in Malay. Eaton and Spring 440 



Note on the resin (yacca gum) in Xanthorrhcea quadrangulato, Osborn__ 4»'.» 



DISEASES OF PLANTS. 



The relation of phytopathologists to plant disease survey work. Lyman__ 4-10 



I Report of] the botany and bacteriology department. Swingle ll'.i 



Seed treatment of cucumber angular leaf spot, Gilbert and Gardner _. _ 440 



f'opper sulphate as a disinfectant fur potatoes, Bisby and Tolaas 4."i0 



Two Illinois rhubarb diseases, Stevens 450 



Physiological studios of normal and blighted spinach. True et al 456 



Brown blotch of the Kiofl'er pear. Martin 4."»1 



Plum pocket and loaf gall on Americana plums. Swingle and Morris 4o2 



The life history and parasitism of Eocronartiwn muacicola, Fitzpatrlck__ 452 



ECONOMIC ZOOT.OOY — ENTOMOLOGY. 



[Economic insects and their control in Kansas] 4.">J 



[Report of] the entomology department, Cooley 452 



Fifteenth annual report of the State entomologist of Montana, Cooley 452 



[Economic insects in Cuba], Cardln 4.~>.". 



[Insect pests in St. Lucia, 1917-18], Hutson 453 



Report on the work of the entomological division. Spoyer 453 



Insects affecting the castor bean In Cuba, Cardln 4">:; 



The insect pests of maize. Gurney _ 463 



Insects bred from bark and wood of American larch, Blackman and Stage. 153 



Fungi cultivated by termites in vicinity of Manila and Los Bafios, Brown. 453 



Machine gun work with 8 new formula on red spiders. .Tones 458 



The mixing of oil emulsions with lime-sulphur solutions. Vothers .\:.\ 



The toxic action of KCN and its relation to the cell, Lund 4.",.", 



The tarnished plant bug and its injury to nursery stock. Ilaseman 455 



Value of high temperature for controlling the common bedbug, Gibson 456 



A contribution to the physiology of wing development in aphlds, Shlnji___ 45a 



Genetic relations in the aphid MacroHphum solanifolii, Shull 4.mi 



Prevention and arresl of lice-borne diseases by disinfection. Hunter 456 



Notes on Japanese Lepidoptera and their larva. I-V. Wlleman 4.".c> 



Control work with grapevine cochylis in Vaudols vineyards in 1917, Faes 156 



The large aspen tortril, CiK-'irciii i on flic-tana, Criddh- 4.-,C, 



The origin of the pink bollworm, Marlatt 456 



Walnut worm threatens industry. Smith 456 



The bean By, Otanes y Quesales 4.~>7 



Oviposltion in the celery fly. Taylor 4".7 



Winter hibernation of Anopheles larvse, Griffitts — 15 , 



On mosquito larvicides. Kirk 158 



A contribution to the knowledge of the Brazilian (Estrimp. Lutz 15S 



Distribution of nose fly and other species of Gastrophllus, Bishopp 



Oa8trophilu» duoilcnalis. Mendy 458 



A serious pest to stored wheat, the lesser grain borer, Froggatt— .— 158 



Four new African Hymenoptera belonging to Microgasterime. Cahan 



Beekeeping may increase the cotton crop. Meade 458 



Description and notes on some Ichneumon flies from Java. Rohwer 458 



Descriptions of some sawflies from the Australian region. Rohwer 4.".:> 



An entomogenous fungus growing from the cocoon of a braconid, Lyle i:.\> 



The biology of fruit-fly parasites in Hawaii, Pemberton and Willard 



Adult habits of some hymenopterous egg parasites of Orthoptera. Brues___ 4r,r> 



[Leaf gall on American plums], Swingle and Morris ^- 459 



The common cattle tick in Argentina. Jasschke 459 



