

J'/^^i^-^- S'^:^§m -^'^f^W^ ^ ■ 



B?''^'^ 



:^ 



83 



Plate XX. — Fi^s. 8/, 82, 83. Exoascus uiirabilis Atkinson [on P. angusti- 

 folia Marshall); 80, 84, Exoascus sp. {on P. virginiana L.). 



