» oo -i 
19. 
20. 
14 
Additions to the list of Hemiptera of Ohio — HERBERT OsSBorN 
New species of birds collected in Lorain county — LyNnps JONES 
Notes on plants for 1900 = = = - A. D. SELBY 
Notes on the self-pruning of trees - - ~ - 
= ~ - Joun H. ScHAFFNER and Frep J. TyYLer 
Some mastodontic pipes - - - - J. P. McLean 
Report on ecological study of Big Spring prairie - —- 
- - — ~ - - - ~ THOMAS BONSER 
A new insect pest in Ohio - - - F. M. WEsSTER 
Six new species, including three new genera of fossil 
plants - - - - = - ~ A. HERZER 
Remarks on the fleshy fungi - ~ H. C. BEARDSLEE 
The classification of the Waverly series of central Ohio 
- - - ~ - ~ - CHARLES S. PROSSER 
Note on a case of recent stream capture near Cleve- 
land - - GeorceE R. Twiss 
A rock valley crossing Huron and Erie counties - -—- 
- - E. L. MosELey 
Interpretation of the drainage modification of South— 
eastern Ohio - - ~ - ~ W. G. Ticut 
Electro—magnetic induction considered as a means of lo— 
cating and tracing sub-surface streams of water -— 
Whirlwinds and tornadoes considered as examples of 
electro-magnetic rotations = - - — — 
Physical conditions of the earth thought to be favorable 
to the production of whirlwinds in certain localities 
- - _ = - ~ ~ - = J. G. Sutton 
Note on the distribution of Taraxacum erythrocarpum 
— W. A. KELLERMAN 
Old-squaw ducks (not “pintails”) caught in deep water 
fish nets - — = — — - E. L. MosELey 
Remarks on archeology = - ~ — Wie tO, Mbauus) 
Notes on the Isopoda of Ohio — - - Josua LINDAHL 
Report for 1900 on the state herbarium, including addi- 
ditions to the state plant list - —  W. A. KELLERMAN 
Some distribution notes - - _ - F. M. WEssTER 
Notes on the cocklebur - - — E, E. MastERMAN 
Some experiments in the exportation of beneficial insects 
- - ~ F. M. WEBSTER 
Occurrence of Anthurus borealis at Cleveland H.C. BEARDSLEE 
PRESIDENT’S AppRESS — Comparative measurements of 46 specimens 
of Amblystoma microstonum. 
Cope — A study in variation, with some introductory remarks 
* = = = — = - - Josua LINDAHL 
E. L. Moestey, Secretary. 
