PLATE SI 

 Sorosporella uvella: 



A. — Infected cutworm torn open, exposing the resting-spore aggregations. X 1.2. 



B. — A single resting-spore aggregation, X nS- 



C. — A portion of a resting-spore aggregation germinating in water, showing promy- 

 celial -like germination, and conidia. X 250. 



D. — A colony of young resting spores from an infected insect, showing the manner 

 in which they reproduce. X 570. 



E. — Isolated mature resting spores, some of which show the ruptured walls of pre- 

 viously cohering spores. X 570. 



F. — Mature resting spores germinating in water. X 570. 



G. — Isaria-like fascicle of cohering conidiiferous hyphse which developed when the 

 resting spores of an infected larva were allowed to germinate in a moist chamber. 



X 300- 



H. — Portion of a mature resting-spore aggregation. X 250. 



I. — Conidia, or secondary spores. X 570. 



J. — Conidia, or secondary spores, germinating. X 570. 



K. — Portion of a section through the body of an infected cutworm which had been 

 placed in a moist chamber to induce germination of the resting spores, showing the 

 usual type of conidiophores. X 200. 



L. — Mature resting spore germinating in water, showing conidiophore with ver- 

 ticillately arranged sterigmata. X 570. 



M. — Mature resting spores germinating on nutrient agar, showing sessile sterigmata 

 and conidia at one place and young resting spores arising by budding at another 

 place. X 570- 



N. — Early stages in the germination of mature resting spores in water. X 570. 



O. — Advanced stages in the germination of resting spores in water. X 570. 



P. — Sterigmata, showing method of conidial abjunction. X 570. 



Q. — Enlarged view of conidial germination. X 1-050. 



R. — Enlarged view of conidia. X 1,050. 



S. — Torula-like reproduction in culture. X 570. 



(440) 



