TABLE OF CONTENTS 
PAGE 
The reproductive organs of the female maia moth, 
Hemileuca maia (Drury), (with two plates) 
Wm. S. Marshall, 1 
The correlation of fracture systems and the evidences of 
planetary dislocations within the earth’s crust (with, 
one plate) . . William Herbert Hobbs, 15 
The nature and origin of the binucleated cells in some 
Basidiomycetes (with three plates) 
Susis Per civ al Nichols, 30 
The Russulas of Madison and vicinity 
Rollin H. Demniston, 71 
The relation of the Andrenine bees to the entomophilous 
flora of Milwaukee county . 8. Graenicher, 89 
Observations on the wintering of grain rus +tt 
A. H. Christman j 98 
Habits and anatomy of the larva of the caddis fly* 
Platyphylax designatus (Walker), (with two plates) 
Charles T. Vorhies, 108 
Notes on the occurrence of Oscillatoria prolifica (Gre- 
ville) Gomont in the ice of Pine Lake, Waukesha 
county, Wisconsin . . . Edgar W. Olive, 124 
Infection experiments with Erysiphe graminis, D. C. 
George M. Reed, 135 
