50 BULLETIN 380, U. 8. DEPARTMENT OF AGRICULTURE. 
Endothéa fluens, while common to Europe, Asia, and America, has 
a much more limited range in the United States than #.gyrosa. It 
is fairly common on Castanea and Quercus from southern Pennsyl- 
vania and Ohio to northern Mississippi and Alabama. In south- 
eastern Pennsylvania it has been found so far only on roots of 
Quercus, and in northern Mississippi and Alabama only on Castanea 
dentata. 
Endothia fluens mississippiensis was first sent to the writers from 
Corinth, Miss., by Mr. T. E. Snyder, of the Bureau of Entomology, 
and has since been collected in only four other localities, three near 
the northeastern corner of Mississippi and one in central Kentucky. 
Fic. 2.—Outline map of the United States, showing the distribution of Endothia fluens. 
As both Endothia gyrosa and E. fluens were collected in this 
country nearly a century ago by Schweinitz, it seems altogether 
probable that they are indigenous species which may have already 
reached the limits of their natural ranges in this country. 
While the maps (figs. 1-4) do not give by any means every locality 
where Endothia is to be found and specimens are likely to be col- 
lected at many points outside the present known range, the writers 
feel justified in assuming that these maps represent the limits of 
the territory where Endothia gyrosa and EL. fluens may commonly be 
found. This is especially true in the eastern portion, where the field 
has been rather thoroughly worked. It is unlikely, for instance, 
that EZ. fluens occurs abundantly in southern Alabama and Georgia, 
where £. gyrosa was found so commonly. Southeastern Pennsyl- 
vania must be somewhere near the northern limit for Z'. fluens, for 
thé writers’ four collections in that region are the result of six days’ 
