136 STEVENS: PREVALENCE OF ENDOTHIA GYROSA 
RANGES OF HOST SPECIES 
The maps, Fics. 2-4, show the ranges of the various host 
species: Fic. 2, the ranges of Castanea, Liquidambar and Fagus; 
Fics. 3 and 4, the ranges of the species of Quercus on which E. 
¥ Fagus Grane ori 
I 5 2 Castanéa denta 
‘ 3 Liguidambar seereairiies 
—S $cace 
oe S$ 0 8 100 180 200 miLEs 
i 
Fic. 2. Ranges of Fagus grandifolia, Castanea dentata, and Liquidambar 
Styraciflua in the United States. Map prepared by W. H. Lamb, United States 
Forest Service. 
gyrosa is known to occur. A eee of the range maps shows 
that certain of the host species, i. e., Castanea dentata, Fagus 
grandtfolia, Quercus alba, Q. coccinea, ‘0. falcata, Q. Prinus, Q. 
