gUN 1 8 W15 
The Ohio f\£aturalist, 
and Journal of Science 
PUBLISHED BY 
The Biological Club of the Ohio State University. 
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Volume XV. 
MAY, 1915 . 
No. 7. 
TABLE OF CONTENTS 
Osborn and Drake— Additions and Notes on the Hemiptera-Heteroptera of Ohio_ 501 
Schaffner — Tlie Chromosome Mechanism as a Basis for Mendelian Phenomena. 509 
Schroyf.r —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 
* Contribution from 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 omatus 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.) 
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