Ann. lU-]>. U. 8. (.eoio. iiud (-eogr. Snrv. for lri7.'>. 



MAP 



SHOWING THE DISTRrBUTION 



of the 



CHINCH BUG 



(BLISSUS LEUCOPTERUS) 

 A.S.PACKAKDJK. 



Regions most ravaged. 

 Lhait of Wheat culti- 

 vation in eastern U.S. 



Sial.-.)fSlatuti;Milfs 

 50 KJO lOO 200 250 a(X) MU 400 



R.l-•^ell ^ Slrutlicrs.N.Y. 



