VI 
CONTENTS 
Page 
Maxson, A. C. Some Factors Influencing the 'Distribution of Pem¬ 
phigus betoe in the Beet Fields 231 
McColloch, J. W. A Note on False Wireworms with Especial Refer¬ 
ence to Eleodes tricostata 212 
McConnell, W. R. Miris saltator Lindm. as a Parasite of the Hessian 
Fly 168 
Morrill, A. W. Experiments with Grasshopper Baits with Incidental 
Observations on the Habits and Destructiveness of the Differen¬ 
tial Grasshopper, Melanoplus differentialis 175 
Moore, Wm. Fumigation with Chlorpicrin ' 357 
Observations on the Mode of Action of Contact Insecticides 443 
Moore, William and Graham, S. A. A Study of the Toxicity of Kero¬ 
sene 70 
O’Gara, P. J. Notes on a New Mite Attacking Valley Cottonwood 430 
Paddock, F. B. Texas Aphid Notes 29 
Foul Brood Eradication Work in Texas 351 
Parker, J. R. The Life History and Habits of Chloropisca glabra 
Meign., a Predaceous Oscinid 368 
Parker, R. R. Some Results of Two Years’ Investigations of the 
Rocky Mountain Spotted Fever Tick in Eastern Montana 189 
Parks, T. H. Planning a State Extension Project in Entomology 157 
Parrott, P. J. The Apple Ermine Moth 55 
Parshley, H. M. Three Species of Anasa Injurious in the North 471 
Peterson, Alvah. Some Experiments on the Adults and Eggs of the 
Peach Tree Borer, Sanninoidea exitiosa Say. and Other Notes 46 
Pettey, F. W. A New Species of Sciara Bred from Red Clover Crowns 420 
4 
Primm, J. K. The European Poplar Canker in the Vicinity of Phila¬ 
delphia, Pa. 129 
Quayle, H. J. Cyanide Fumigation 294 
Rust, E. W. Anastrepha fraterculus Weid., a Severe Menace to the 
Southern United States 457 
Sasscer, E. R. Important Foreign Insect Pests Collected on Imported 
Nursery Stock in 1917 125 
Sasscer, E. R. and Dietz, H. F. Notes on the Fumigation of Orchids 168 
Severin, H. H. P. A Native Food Plant of Rhagoletis fausta O. S. 325 
