CONTENTS 
Eight Unedited Letters of Joseph Eitson. Henry A. Bnrd 1 
A Species List of the Aphididae of the World and their 
Eecorded Food Plants. H. F. Wilson and K. A. 
Viekery_____- 22 
The Influence of the French Farce on the Towneley Cycle 
of Mystery Plays. Louis Wann ____ 356 
The Preparation of Selenic Acid. H. H. Morris__ 369 
The Fauna of Lake Mendota—A Qualitative and Quanti¬ 
tative Survey with Special Eeference to the Insects. 
(With one Figure). E. A. Muttkowski_ 374 
Notes on the Vertebrate Fauna of Houghton and Iron 
Counties, Michigan. (With Plates I-V). Alvin E. 
Cahn_________——-- 483 
A Eeview of the Plover Genus OcMhodromus Eeichenbach 
and its Nearest Allies. Harry C. Oberholser_ 511 
The Amount of Food Eaten by the Spider, Aranea 
sericata. Catherine Elizabeth Nebel ______ 524 
The Visceral Anatomy of the Garter Snake. (With five 
Figures). William Henry Atwood___ 531 
Studies on Myxosporidia from the Urinary Bladders of 
Wisconsin Fishes. (With Plates VI-VIII). J. W. 
Mavor and W. Strasser _______ 553 
LympJiocystis vitrei, a New Sporozoan from the Pike- 
Perch, Stizostedion vitreum Mitchell. (With Plate 
IX). J. W. Mavor and S. M. Feinberg___ 559 
Selective Absorption in the Visible Spectrum of Wiscon¬ 
sin Lake Waters. (With thirteen Figures). W. B. 
Pietenpol ________ 562 
A Biochemical Study of the Plankton of Lake Mendota. 
H. A. Schuette ______ 594 
A Second List of Algae found in Wisconsin Lakes. 
(With Plates X-XV). Gilbert Morgan Smith __ 614 
