38 THE CHINCH BUG. 
before the commencement of this breeding season or just at the close 
thereof, thus enabling the major portion of the young to reach a 
period in their development wherein they are little, if at all, sus- 
ceptible to the effects of drenching rains. This was clearly illus- 
trated in southern Ohio during the spring of 1896, and again in 1897. 
Throughout southern Ohio, in 1896, between latitude 38° 30’ and 39° 
40’, as the reports of the United States Weather Bureau show, there 
OEFIANCE 
PAULDING 
ate 
TUSCARAWAS 
eit. ere 
OELAWARE 
LICKING 
4 FRANKLIN 
MADISON 
PICKAWaY 
Fig. 12.—Map showing distribution of chtnech bug in Ohio in 1907. (Author's illustration. ) 
had been but very little rain up to May 11, and no general 
rain until May 25. The effect upon the young bugs, judging from 
the destruction which they caused, would seem to have been to 
destroy only the latest to hatch, leaving the earlier developing 
young sufficiently advanced to withstand the effects of the later and 
heavier rains. The accompanying map (fig. 11) will show the areas 
over which chinch bugs were reported marked thus =—, while the 
