CONTENTS. 



PAGE. 



The Fruit Worms of the Apple in Nova Scotia , . . . . . 313 



The Use of the Spray-gun in Canada . . . . , . . . . . "M'S 

 Notes on th(} Chinese Dryinid Parasite of the Sugar-cane Leaf- 



hoppor In Hawaii . . . . . . . . . . . . . . 313 



Maize P( sts and tlicir Control in S. Rhodesia . . . . . . 314 



Spraying Methods against Insect Pests in Tennessee . . . . 315 



Insect Pests in Montana in 1918 .. .. .. .. .. 315 



Orchard and Shade-tree pests in S. Dakota .. .. .. .. 316 



A new Mite predaceous on iepidosop/ies «?mi in Iowa ,. .. 316 

 The F. fleet of Humidity on the Pupae of Drosophila ampeJophila 



in U.S.A 316 



Relations of the Winged and Wingless Forms in 3£aerosiphum 



solanifolii . . . . . . . . . . . . . . . . 316 



The Mixing of Oil Emulsion with Ivime-Sulphur Solutions . . ... 317 



A Race of the Codling Moth infesting Walnuts in California . . 317 



Th(^, Occurrence of Icerya hrasiliensis in Argentina . . . . . . 318 



Notes on Lewia bi^iweaf a in Argentina .. .. .. .. 318 



A new Aleurodid from Argentina . . . . . . . . . . 318 



A Benibecid Wasp predaceous on the Larvae of Rhynchota in 



Argentina ., .. .. .. .. .. ., 318 



Longicorn Beetles introduced into the Province of Buenos Aires, 



Argentina . . . . . . . . . . . . . . . . 319 



The Toxic Action of some VolatUe Substances on Various InRects 319 

 I'icromerus bidens predaceous on the Larvae of Chrysomelids in 



France 320 



Maize Pests in Minnesota . . . . . . . . . . . . 320 



Notes on Hsmerocampa leucosUgma in Minnesota . . . . . . 320 



M<'asures against Epfiestia kiihniella in U.S.A. . . . . . . 320 



New Hymcnoptcrous Parasites in U.S.A. . . . . . . . . 321 



N«-w Ptinids infestmg Forest Trees in U.S.A. 321 



The Rose Midge in U.S.A 321 



Insects infesting the Swamp Rose-mallow in New Jersey .. .. 322 



The Bionomics of Aphis grossidariae and A. viburni in Britain 322 



Measures against Heterodei-a radiclcola in U.S.A. . . . . 323 & 324 



Tyhnclms tritici infesting Wheat in U.S.A. . . , . . . . . 324 



Agrilus arcuatus var. torquaUib infesting Oaks in Minnesota . . 324 



Experiments against Potato Pests in Minnesota . . . . . . 325 



Damage to Codar Trees by Ants in Minnesota . . , . . . 326 



Notes on the Classification of Aphids . . . . . . . . . . 326 



Measures against the Confused Flour Beetle in Miii'i''^'>'i .. ,, 327 



Notes on BrucJioplmgua fimebris in Minnesota . . . . 327 



Notes on the Trombidtid Mites of Minnesota . . . . , . 327 



The Hymenoptera of Minnesota . . . . . , , . 328 



Household Insects in Minnesota . . . . . . . . . . 328 



Insect Pests in Hawaii in 1918 . . 328 



Quarantine Measures against Insect Pests in Hawaii in 1918 . . 329 

 The Bionomics of the Corn Leaf Hopper {Peregrinua maiffis) ^n 



Hawaii 329 



A Preliminary Report on the Cotton Pests of S. Africa . . . . 330 



'^otvs on Aspidiotus perniciosus in ^. Ahioa .. .. .. 331 



Measures against Fhthorimaea o-perctdella in S. Africa . . 331 



Orchard Pests in S. Africa . . 332 



Insects Injurious to the Black Wattle, .4ca<n« •.w^z/.c..;. ,;..., 332 



Not( s on the Codling Moth in New Mexico 333 



Measures against White Grubs in Iowa . . . . . . 334 



Froglioppcrs and Diseases of Sugar-Cane in Trinidad . . . . 335 



A New Speci(^8 of Olene inf( .sting deciduous Trees in North America 336 



Xoti s on CocciDAE in North America . . . . . , . , 336 



A new Coccid on Coconut Palms in the Philippines . . . . . . 336 



Insect Pt sts in Tortola in 1917-18 . . . . 337 



IniM ct Pi sts in Ontario in 1918 . . , . . . 337 

 Notes on Bugs of the G-nus Corylhaica in America aud the West 



Indies . . . . .... . . . . . , . . 338 



