CONTENTS. 



Page. 

 Eighth annual meeting of the Association of Economic Entomolo- 

 gists 5 



The Evolution of Economic Entomology C. II. Fernald.. 5 



Some Temperature Effects on Household Insects L. 0. Howard.. 13 



Three Years' Study of an Outbreak of the Chinch Bug in Ohio (illustrated) .. 



F.M. Webster.. 18 



A New Insecticide A. II. Eirkland.. 27 



Comparative Tests with New and Old Arsenicals on Eoliage and with 



Larvae C.L.Marlatt.. 30 



On the Futility of Trunk and Crown Washing against the Elm Leaf-beetle 



, L.O. Howard.. 36 



Insecticide Soaps C.L. Marlatt . . 38 



Scale Insects and their Enemies in California ....J.B. Smith.. 46 



Insect Enemies of Forest Trees* A. D. Hopkins. . 49 



Notes on Some of the Insects of the Year in the State of New York 



J. A. Lintner . . 54 



Entomological Notes from Maryland TV. G. Johnson . . 63 



Insects of the Year in Ohio F.M. Webster.. 66 



Some Notes on Observations in West Virginia on Farm, Garden, and Fruit 



Insects A. D. Hopkins . . 71 



Eemarks on Steam Spraying Machines * L. 0. Howard. . 74 



Notes on New and Old Scale Insects W. G. Johnson . . 74 



Notes on the Entomological Events of 1896 in Iowa Herbert Osborn.. 78 



Is Coo2>eration for the Control of the San Jose Scale Practicable 



Wm. B. Alwood.. 80 



The Development of the Mediterranean Flour Moth F.H. Chittenden . . 85 



The Grasshopper Disease in Colorado C. P. Gillette.. 89 



A Simple Device for the Preparation of Oil Emulsions (illustrated) 



H. A. Morgan.. 93 



Constitution of the Association of Economic Entomologists 96 



List of members of the Association of Economic Entomologists 99 



* Withdrawn for publication elsewhere. 



