ne Ohio ^hl^aturahs 



PUBIvISHED BY 



The Biological Club of the Ohio State Uni-versity. 

 Volume V. FEBRUARY, 1905, No. 4. 



TABLE OF CONTENTS 



OSBORN— Report of Progress on Study of the Hemiptera of Ohio and Description 



of New 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 Kotes on the Family Gelastocoridfe, 287 



York— The Hibernacula of Ohio AVater Plants 291 



ScHAFFNEit, Mabel— Key to the Ohio Sumacs in the Winter Condition 293 



Surface — !Meeting nf the Biological CluL 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 history 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 Steuben ville as well as in the 

 vicinitv 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. 

 Swezev. 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 Sav. This species which is common further 

 south and an interesting addition to our state fauna was taken 

 at Chillicothe bv Mr. Swezev. 



♦Presented at meeting of Ohio Acad. Sci., Cleveland, November 26. 1904. 



