22 



seriously ravaged the same area twice. The nearest to come thereto is 

 northeastern Ohio, in Ashtabula, Trumbull, Portage, and Mahoning 

 counties, where considerable damage was done in meadows last year, 

 and fully as much, if not more, is being caused this year. (See fig. 3.) 

 The immunity from attack of chinch bug continuously enjoyed by 

 Clark, Greene, and Montgomery counties, as also portions of other 

 counties adjacent, I find it impossible to account for. The map of ele- 



Ftg. 4.— Map of Oliio, giving elevations at various points as determined by railway surveys (original) . 



vations (fig. 4) plainly shows that elevation was not responsible, as 

 practically the same elevations obtain in the extreme northeast, where 

 destruction has been caused during both of these years. More than 

 that, the former area includes a section of level prairie country between 

 narrow belts of timber, that has never been wooded in the history of 

 its occupancy by the white man, and is the very place of all others 

 where the chinch bug might be looked for during years of abundance. 



