ENTOMOPHTHORALES 



291 



intersegmental abdominal membranes of the host, and falling 

 away gradually, are disseminated by the wind. The conidia, 

 unlike those of other genera, are markedly verrucose instead of 

 smooth (Fig. 105). The early stages of mycelial development 

 have not yet been satisfactorily observed, but in later phases 

 hyphal bodies are present, and give rise to conidiophores and 



Fig. 106. — iMassospora cicadina Peck on periodical cicada {Tihicina septen- 

 decim L.). (a) Portions of the anterior four abdominal segments dissected away 

 to expose the mass of resting spores within, (b) The abdomen with the attached 

 mass of conidia after considerable natural sloughing off has occurred. (After 

 Spear e 1921.) 



resting spores. The latter are spherical, slightly brownish, and 

 have beautifully reticulated walls. Each resting spore arises as 

 a bud from a hyphal body and is apparently asexually produced. 

 In the present state of knowledge these spores are to be regarded 

 as azygospores, but a more critical study of their method of 

 formation is desirable. No data are available bearing on the 

 question of how the fungus passes the long period during which 

 the host remains under ground. 



