516 Proceedings of Indiana Academy of Science. 



Fig. 1. — Normal perithecium. 



Mg. 2. — Parasitized perithecium. Fig. 3. — Conidia 

 highly magnified. 



(The writer wishes here to thank Professor Weatherwax for uialviug tlie 

 tliree camera lucida drawings wliicli accompany tliis paper.) 

 Indiana University, 

 Septemer, 1920, 



