CONTENTS— coji^ 



PAGE. 



A Study of the Toxicity of Kerosene 200 



Insecticide Tests witli Biabrotica vittata in U.S.A 200 



Experiments in the Control of Pieris ra/pae in Wisconsin . . . . 201 



Experiments with Poisoned Bait for the Onion Maggot, Rylemyia 



aniiqiui, in U.S.A. . . . . . • • • • • • • • ■ 202 



Notes on the Biology of the Angoumois Grain Moth, Sitotroga 



cerealella, in U.S.A. . . . . • . . . . • • • 202 



The Value of the Economic Entomologist in Connection with Food 



Production in U.S.A 203 



Proposed Kegulations restricting the Importation of Nursery Stock 



into U.S.A .. 204 



The Control of Imported Pests recently foxind in New Jersey . . 204 

 Foreign Insect Pests collected on Imported Nursery Stock in 1917 



in U.S.A 205 



The Kelation of the Spread of Poplar Canker to the Presence of 



Oryptorrhynchus lapathi in U.S.A. . . . . . . . . 206 



Studies on the Life-history of two Scababaeidae in Kansas . . 207 



Notes on three Species of Apple Leaf-hoppers in U.S.A 207 



A new Species of Eriophyes attacking Juniper in Arizona . . . . 208 



The Value of Nicotine Sulphate for Codling Moth Eggs in U.S.A. . . 208 

 Notes on the Ethiopian Fruit-flies of the Family Trypetidae, other 



than Bacus . . 208 



A New Weevil Pest of Sweet Potatoes in Jamaica . . . . . . 209 



Notes on African Aphids . . . . . . . . . . . . 209 



A New Scolytid injurious to Dried Sweet Potatoes in Jamaica . . 210 



The Alfalfa Looper, PJiytometra calif ornica, in Canada . . . . 210 



Insect Pests and their Control in Antigua . . . . ... . . 210 



Experiments in Sericulture in India .. .. ... .. .. 211 



Phora rufipes parasitising the Adult of Herse convolvuU in Ireland. . 212 



A New Species of Myzus from the Thistle in Britam ... . . 212 



Aphids injurious to Orchard and Bush Fruits in U.S.A. ... . . 212 



The Tobacco Budworm(Helioihis virescens) and its Control in U.S.A. 213 



The Red Spider on Cottcm,and how to control it in U.S.A. . . . . 214 



Asparagus Beetles and their Control in U.S.A. .. ,. .. 214 



The Gripsy Moth and.Brown-tail Moth and their Control in U.S.A. . . 215 



The Tobacco Beetle and how to prevent Damage by it in U.S.A. . . 215 



The Common Mealy Bug and its Control in CaUfomia .. .. 215 



The Use of Powdered Arsenate of Lead against PhhgetJiontius in 



U.S.A 216 



Fumigation of Ornamental Greenhouse Plants with Hydrocyanic 



Acid Gas 216 



The SUverfish an Injurious Household Insect . . . . . . 216 



The Value of Spraying against Citrus Pests in Florida . . . . 216 



The Control of Halisidota caryae in Orchards in U.S.A. . . . . 217 



The Bionomics of the Citrus Thrips in U.S.A. . . . . . . 218 



Idiocerus scurra, an imported Poplar Leaf -hopper in New Jersey . . 218 



The Rearing of Brosophila on artificial Media . . . . . . 219 



A New Parasite of Colemania sphenarioides in India . . . . 220 



Pests of Cowpeas in U.S.A 221 



Oracilaria zachrysa and its Control in Greenhouses in New Jersey. . 221 



A Species of Mermis infesting Grasshoppers in Vermont . . . . 221 



Ascogaster carpocapsae, a Parasite of Onidocampaflaveseens in U.S.A. 222 



Biology of the Membracidae of the Cayuga Lake Basin in U.S.A. . . 222 



Pests of Stored Tobacco in Java . . . . 222 



