May, 1915.] 



Hemiptera-Heteroptera of Ohio. 



507 



siderable extension; its occurrence during the summer cited in- 

 cluded localities all the way from the northern to the southern 

 portion of the state and eastward to far past the central portion. 



The localities indicated on the map will show the distribution 

 of the species in the state. Many of these records were secured 

 thru the Ohio Experiment Station, the Extension Department of 

 Ohio State University, and members of the Department of Zoology 

 and Entomology of the University. Thni these sources specimens 

 have been received and identified from the following localities: 



OHIO 



Fig. 2. Map showing distribution of Box Elder Bug in Ohio, 1913. 



Oxford, Butler Co. ; WilHamsburg, Clermont Co. ; Washington C. 

 H., Fayette Co. ; Osbom and Yellow Springs, Greene Co. ; Catawba, 

 Clark Co. ; Ft. Recovery and Celina, Mercer Co. ; West Liberty, 

 Logan Co.; Columbus, Franklin Co.; Galena, Delaware Co.; 

 Montpelier, Williams Co. ; Liberty Center, Henry Co. ; BowHng 

 Green and Longley, Wood Co. ; Helena and Clyde, Sandusky Co. ; 

 Chicago Jc. and'Norwalk, Huron Co.; Berea, Cuyahoga Co.; 

 Carrolton, Carroll Co. 



The factors affecting the distribution within the state are not 

 apparent, at least so far as the present records indicate. The 

 advance within the state appears to be independent of all railway 

 lines; this also seems substantially true of many of the different 



