luj LIBR AitY 



The Ohio T^aturali 



PUBLISHED BY 



The Biological Club of the Ohio State University. 



Volume VI. 



FEBRUARY. 1906. 



No. 4. 



TABLE OF CONTENTS. 



Berger— Notes on the Fall Welnvorm (Hyphaiitria cuiiea) in Ohio 453 



SCHAFFNER— Check List of Ohio Trees -157 



Stekki— Note on List of Ohio Mollusca, ami a Suggestion in Regan! to Local Fannal 



Lists 462 



MosELEY— The Cause of Trembles in Cattle, Sheep and Horses and of Milk-Sickuess in 



People 463 



A State Natural History Survey 471 



SCHAFFNER— Sexual and Nonsexual Geneiations 473 



SUMSTINE— Note on Aiithurus borealis 474 



Metca LP— Meeting of the Biological Club 474 



NOTES ON THE FALL WEBWORM (HYPHANTRIA CUNEA) 



IN OHIO.* 



E. W. Berger. 



The majority of the observations upon which this paper is 

 based were made at Cedar Point, Sandusky, Ohio, during the 

 past summer while the writer was at the Lake Laboratory of the 

 Ohio State University. The webs of this caterpillar were 

 abundant on all sides and those who had spent preceding sum- 

 mers at Cedar Point were under the impression that the Web- 

 worm was on the increase. After a few days of casual observa- 

 tion it was decided to make a more careful study of its habits, 

 and, if possible, to determine whether it is double brooded at 

 that place. 



While a few specimens pupated in the laboratory during the 

 latter part of July, none of them transformed into adults, and no 

 positive results were obtained in regard to a possible second 

 l3rood. 



Acknowledgment is due Professor Osborn for his interest 

 and generosity with valuable suggestions and facilities placed at 

 the writer's command. 



Food Plants. — The worms were observed upon the following 

 trees: Walnut (Juglans nigra L.), Choke-cherry {Prunus vir- 

 giniana L.), Common Wild Black Cherry (Prunus serotina Ehr), 

 Willow (Salix sp.). Elm {Ulmus americana L), Box-wood (Cornus 

 fiorida L), Hackberry {Celtis occidentalis L), and Wild Grape 



* Abstract of paper read December 2. Cincinnati, Ohio State Acad, of Sci. 



