216 Proceedings of Indiana Academy of Science. 
Fig. 1—Normal perithecium. Fig. 2.—Parasitized perithecium. Fig. 3.—Conidia 
highly magnified. 
(The writer wishes here to thank Professor Weatherwax for making the 
three camera lucida drawings which accompany this paper.) 
Indiana University, 
Septemer, 1920. 
