Bui. 25, Div. of Agrostology, U. S. Dept. of Agriculture. 



Plate XXVI 



Fig. I.-Shad Scale (Atriplex canescensK Plant protected from grazing, 



NEAR Tucson, Ariz. 



From a photograph by D. Griffiths. 



Fig. 2. -Shad Scale (Atriplex canescens). Plants in the same Locality 



NEARLY destroyed BY OVERSTOCKING. 

 From a photograph by D. Griffitlis. 



