The Ohio ^JSCaturalist, 



and Journal of Science 



PUBLISHED BY 



The Biological Club of the Ohio State University. 

 Volume XV. MAY, 1915. No. 7. 



TABLE OF CONTENTS. 



OsBORN AND DRAKE— Additions and Notes on the Hemiptera-Heteroptera of Ohio — 501 



ScHAFFNER— The Chromosome Mechanism as a Basis for Mendelian Phenomena 509 



ScHROYER — Buried Stream Channels at the Base of the Pennsylvanian System in 



Southeastern Ohio 519 



Drake — Meeting of the Biological Club 523 



ADDITIONS AND NOTES ON THE HEMIPTERA- 

 HETEROPTERA OF OHIO.* 



Herbert Osborn and Carl J. Drake. 



Some years have passed since the last record of additions to 

 the Hemipterous fauna of Ohio was made, and in the meantime 

 a number of additional species have been noted. It seems de- 

 sirable to place on record the occurence of these species at this 

 time. 



A number of these species were collected by the senior writer, 

 but in recent years his attention has been directed particularly 

 to the Homoptera. About two years ago, the junior author began 

 a survey of the aquatic and semi-aquatic Heteroptera of the state 

 and, incidentally, he has noted many other observations on Heter- 

 optera which are embodied in this paper. 



The papersf in which previous records were made have ap- 

 peared in the Ohio Naturalist, except for the first contribution 



* Contributi on f rem the Department of Zoology and Entomology, Ohio 

 State University. No. 39. 



fRemarks on the Hemipterous Fauna of Ohio with a Preliminary Record 

 of the Species (Proc. O. Acad. Sci. pp. 60-79, 1900). 



A list of Hemiptera Collected in the Vicinity of Bellaire, Ohio. (Ohio 

 Nat., Vol. I, pp. 11-12, 1900). 



Note on Aradus ornatus Say. (Ohio Nat. Vol. IV, p. 22, 1903). 



Aradidae of Ohio. (Ohio Nat., Vol. IV, pp. 36-42, 1903). 



New Species of Ohio Fulgoridae. (Ibid. pp. 44-46, 1903). 



A Further Contribution to the Hemipterous Fauna of Ohio. (Ohio 

 Nat., Vol. IV, pp. 99-103, 1904). 



Report of Progress on Study of the Hemiptera of Ohio and Descriptions 

 of New Species. (Ohio Nat., Vol. V, pp. 273-276, 1905.) 



501 



