TABLE OF CONTENTS. VOLUME VIII. 



Proceedings 4 



Notes on the Variation of Similar Periods of Embryonic Develop- 

 ment; Its Bearing on the Theory of Effective Temperatures. 



By A. A. Girault H 



A Check List of Wisconsin Mammals. By N. Hollister 21 



A Preliminary List of the Flies of Wisconsin Belonging to the 



Families BortibylMdCB, Syrphidcr and Vonopida'. By S. 



Graenicher 32 



Notes and Descriptions of North American Parasitic Hymenop- 



tera VIII. By Charles T. Brues 45 



New Records of Wisconsin Dragonflies. By Richard A. 



Muttkowski 53 



Proceedings 61 



Notes and Descriptions of North American Parasitic Hymenop- 



tera IX. By Charles T. Brues 67 



The Distribution of Certain Wisconsin Mammals. By Hartley 



T. Jackson 86 



The Bee-Flies (BombyUidw) in Their Relations to Flowers. By 



S. Graenicher 91 



The Identity of Two Odonata Fossils. By Dr. F. Ris 102 



Additional Notes on Trichocnemis aliena Scudder. By Richard 



A. Muttkowski 106 



Gomphus cornutus Tough (Odonata) in Milwaukee County. By 



Richard A. Muttkowski 110 



Book Reviews 112 



Proceedings 115 



How Sanguinary Ants Change at Will the Direction of Column 



in Their Forays (F. sanguinea var.). By Alfred C. Burrill. . . . 113 

 The Whitefish of Silver Island Lake, Minnesota. By George 



Wagner 132 



A New Species of Chalcophora (Coleoptera-Buprestido') from 



Wisconsin. By Richard A. Muttkowski 135 



The Relation of the California Ground Squirrel (Citellus beechyi) 



to Bubonic Plague. By William Colby Rucker 137 



