CONTENTS OF VOLUME V. 
Proceedings 1 
The Origin of Species. By Charles Otis Whitman 6 
Wisconsin Flowers and Their Pollination. By S. Graenicher 15 
New Chalcid-flies from Cape Colony. By Charles T. Brues 46 
Notes and Descriptions of North American Parasitic Hymenop- 
tera. III. By Charles T. Brues 54 
A Weasel New to Wisconsin's Fauna. By Henry L. Ward 63 
Proceedings 65 
Notes on a New Guest-ant (Leptothorax glacialis) and the Varities 
of Myrniica hrevinodis. By William Morton Wheeler 70 
Wisconsin Flowers and Their Pollination. II. By S. Graenicher. 84 
Notes and Descriptions of North American Parasitic Hymenop- 
tera. IV. By Charles T. Brues 96 
On the Fertilization of the eggs of Asterias and Arbaca. By Ellen 
Torelle 112 
A New Apiocera from South Africa. By A. L. Melander 125 
Additions to the Lepidopterous Fauna of Milwaukee County. 
By Richard A. Muttkowski 128 
Briefer Articles 134 
Proceedings 139 
Observations on the Nesting Habits of Gorytes canaliculatus, 
Packard. By George P. Barth 141 
Notes and Descriptions of North American Parasitic Hymenop- 
tera. V. By Charles T. Brues 150 
Briefer Articles. 161 
Correction 162 
Proceedings I 163 
A Check List of the Flora of Milwaukee County. By Howland 
Russel 167 
A New Species of Psen. By Henry L. Viereck 251 
On the Nesting Habits of Psen harthi. By George P. Barth 251 
List of Members of the W^isconsin Natural History Society 258 
