

CONTENTS—con*. page 



Italy: Notes on Locusts and their Oophagous Parasites .. .. 41 S 



Japan : A List of the Japanese Aphelininae . . . . . . . . 452 



Morocco : Sericulture and Mulberry Cultivation . . . . . . . . 447 



Portugal : A Platygasterine parasitic on a Cynipid . . . . . . 439 



San Thom6 : New Coccinellids . . . . . . . . . . . . 427 



SiAM : Notes on Coccids and Aleurodids . . . . . . . . . . 440 



Sicily : Measures against Aphids on Tomatos and Cucurbits . . 439 



Spain : Measures against Dacus oleae . . . . . . . . 421 



Switzerland: The Influence of Temperature on Cockchafers .. .. 419 



Switzerland : The Use of Arsenicals against Vine Moths . . . . 427 



Tonkin : Parasites of Xylotrechus quadripes . . . . . . . . 431 



Tunis : Measures against Parlatoria zizyphi on Citrus . . . . . . 447 



U.S.A.: Measures against Aspidiotus perniciosus inTexas .. .. 425 



U.S.A.: Dusting against ^«/Ao«o»«ws ^rawdis in Texas .. .. .. 425 



U.S.A. : The Bionomics and Control of Murgantia histrionica in Nebraska 426 



U.S.A. : Insects injurious to Ornamental Plants . . . . . . . . 433 



U.S.A. : Pests of Cereals and Forage Crops in S. Carolina in 1918 . . 435 

 U.S.A. : The Bionomics of Siphonaphis padi {Aphis avenue) in the South- 

 eastern States . . . . . . . . . . . . . . . . 435 



U.S.A.: Notes on Anihonomus grandis in South Caxolma. .. .. 436 



U.S.A.: Miscellaneous Pests in Minnesota in 1 920 .. .. .. 436 



U.S.A.: Tyroglyphids infesting flour .. .. .. .. .. 437 



U.S.A. : Factors influencing the subcortical Temperatures of Logs . . 437 



U.S.A. : Studies on the Flight of Nocturnal Lepidoptera . . . . . . 437 



U.S.A. : The Principles of Film-forming Sprays . . . . . . . . 438 



U.S.A. : Notes on the Aphidina . . . . . . . . . . . . 438 



U.S.A. : Notes on the North American Species of Deraeocoris . . . . 438 



U.S.A. : A new Leaf-hopper from Florida . . . . . . . . . . 441 



U.S.A. : Membracids from the District of Columbia . . . . . . 441 



U.S.A. : Poison Baits for Grasshoppers in Wisconsin . . . . . . 444 



U.S.A. : Hessian Fly Prevention in Ohio . . . . . . . . . . 445 



West Indies : Lectures on Economic Entomology in Jamaica . . 427 



West Indies : Notes on Miscellaneous Pests and their Control in the 



(U.S.) Virgin Islands 427, 428, 429 



West Indies : Miscellaneous Pests in Barbados in 1918-19 .. .. 456 



Notice of Key to the Genus Psylliodes . . . . . . 418 



The Pests of the Coconut Palm 432 



Correlation of Taxonomic Affinities with Food Habits in Hymenopterous 433 



Parasites 



The Transmission of Leptomonas pyrrhocoris to various Insects . . . . 440 



The Resistance of the Larvae of Galleria mellonella to various Microbes 441 



The Bionomics of Zenillia roseanae, a parasite of Pyrausta nubilalis . . 443 



A Bibliography of Plant Protection Literature in 1920 . . . . . . 445 



