The Ohio ^J^atiiralist, 
PUBLISHED BY 
The Biologkeil Club of ihe Ohio State Uni’versity. 
Volume V. FEBRUARY, 1905. No. 4. 
TABLE OF CONTENTS 
Osborn— Report of Progress on Study of the Ilemiptera of Ohio and Description 
of Xew Species 273 
SCHAFFNER— Key to the Genera of Ohio Woody Plants in the Winter Condition 277 
DE LA Torre Bueno — Nerthra stygica Say and Some Motes on the Family Gelastocorid.'e, 287 
York — The Hibernacnla of Ohio Water Plants 291 
SCHAFFNER. Mabel— Key to the Ohio Sumacs in the Winter Condition 293 
Surface — Meeting of the Biological Clnh 294 
REPORT OF PROGRESS ON STUDY OF THE HEMIPTERA 
OF OHIO AND DESCRIPTION OF NEW SPECIES.* 
Herbert Osborn. 
As a result of collections during the past year quite a number 
of species have been added to the State list, observations have 
been made on distribution, habits and life historv of others and 
much additional material gathered for a general catalogue of the 
Hemiptera of the State. The Trustees kindly assigned a small 
sum from the MacMillin Research Fund but owing to the pres- 
sure of other engagements only a portion of the fund was used 
this season. I was able, however, to make considerable collec- 
tions at Cincinnati, Ashtabula and Steubenville as well as in the 
vicinity of Sandusky where six weeks of the early summer was 
spent. The collections at Steubenville and Ashtabula were for- 
tunate in disclosing forms new to the State and I hope it will be 
possible to get additional material from the northeastern part of 
the State to represent other months. 
A number of species have been collected by Mr. Otto H. 
Swezey, Jas. G. Sanders, and J. S. Hine and I am under special 
obligations to Mr. Chas. Dury of Cincinnati, and Mr. E. V. Louth 
of Ashtabula, for assistance in their respective localities. 
A brief summary of the most interesting of these species and 
descriptions of new species will be given here but it is intended to 
complete a catalogue as early as practicable to include discussion 
of all known species. 
Aradus acutus Say. This species which is common further 
south and an interesting addition to our state fauna was taken 
at Chillicothe by Mr. Swezey. 
♦Presented at meeting of Ohio Acad. Sci., Cleveland. November 26. 1904. 
