Vol. XXXl] KXTOMOLOGICAL XK\\ ^ 115 



Symposium: The functions and interrelation of the State Entomologi- 

 cal Departments. H. A. Gossard, Entomologist, Experiment Station, 

 Raymond C. Osburn Head, Department of Zoology and Entomology, 

 Ohio State University and E. C. Cotton, Chief, Bureau of Horticulture. 



Herbert Osborn Notes on Leaf-hoppers. H. E. Evans The Effect 

 of the Federal Plant Quarantine Act on the Nursery Business. W. M. 

 Barrows The Changes Which Take Place in Insect and Arachnid Muscle 

 During Metamorphosis. T. L. Guyton Results of the Use of Magnesium 

 Arsenate as An Insecticide in 1919. W. H. Larrimer, LaFayette, Indiana 

 Army Worm Control Through County Organization. L. L. Huber 

 Two Parasites of the Resplendent Shield Bearer. Annette F. Braun 

 The Study of Microlepidoptera. C. L. Metcalf The Use of Insect 

 Genitalia in Classification. W. C. Kraatz Remarks on the Insect Fauna 

 of Mirror Lake. C. H. Kennedy Life Histories of the Dragon Flies. 

 H. A. Gossard The Relation of Bees to Fire Blight. E. L. W 7 ickliff- 

 Insect Food of Young Bass. H. L. Dozier Observations on Some Florida 

 Insects. R. S. McKay Observations on Orthoptera in Southern Ohio 

 in 1919. E. W. Long Apiary Inspection in Relation to Entomology. 

 W. V. Balduf Soy Bean Insect Investigations. 



Round Table. The Hessian Fly in Ohio in 1919. T. H. Parks, Leader. 



R. C. Osburn Some Remarks on the Genus Syrphns. F. H. Crecker 

 Distribution of Fresh Water Sponges by Caddis Fly Larvae. J. S. Hine 

 Blood-Sucking Insects Observed on the Katmai Expedition. E. A. Hart- 

 ley Some Observations on Bark Beetle Depredations in Western Yellow 

 Pine in Oregon. P. R. Lowry Remarks on the Dactylopiinae of Ohio. 

 J. S. Houser The Onion Maggot. 



Exhibits: Microlepidoptera, with Examples of Larval Work Miss 

 Brauh. Differentiating Muscle Cells and Developing Tendons in the 

 Legs of Spiders Prof. Barrows, i. Lumbricus terrestris as an Onion 

 Pest. 2. Sphaerostilbe cocophila destroying San Jose Scale Mr. Houser. 

 Map of Periodical Cicada in Ohio in 1919 -Prof. Gossard. 



New officers elected were as follows: President J. S. Houser; Vice- 

 President H. J. Speaker; Secretary T. H. Parks. 



Obituary 



Dr. H. C. WOOD. 



Horatio C. Wood, M. I)., LL. I)., emeritus professor of 

 Materiel Meclica, Pharmacy and ( ieneral Therapeutics in 

 the University of Pennsylvania Medical School, died Januar\ 

 3, 1919. He was horn in Philadelphia, January i.v 1.^41, 

 was educated at the \\V>II<>\\ n School and (he Fi icnds Select 



