454 Agricultural Experiment Station, Ithaca, N. Y. 



Isaria tenuipes. Plate VII. 



76. Couidia germinating after twenty-four hours. 



77. Colony after two days. 



78. aud 79. Threads bearing conidia after four days. 



SporotrichtiTn globuliferum, from Carabid beetle. Plate YIII. 



80. Conidia germinating after one day. 



81. Colony after two days. 



82. Cylindrical spores in the agar, three days. 



83. 84, 85, and 86. Threads bearing conidia. 



87, 88, and 89. Segments of threads in agar germinating after 

 thirteen days. 



90. The same as Fig. 84. 



Isaria farinosa. Plate IX. 



91. On Arctiid larva, x 2. 



Cordycejps militaris. Plate IX. 



92. On unknown insect, x 1^. 



Isaria farinosa. Plate IX. 



93. Depauperate form on insect eggs. 



Sporotrichum globuliferuTn {Isaria sp. ?) Plate IX. 



94. On Yesjpa. x 2. 



Cordycejps inelononthoe., conidial stage. Plate X. 



95. On White grub. 



Isaria arcJinophila. Plate X. 



96. On unknown spider. 



Cordyc&ps clavulata. Plate X. 



97. Perfect stage, x 2. 



98. Isaria stage, x 2. 



Isaria tenuipes. Plate XI. 



99 and 100. Two views of the same culture on potatoes. 



Isaria vexans. Plate XL 



101. Culture in flask on potato. 



The drawings of the development of the forms figured were 



made with a camera-lucida and are, with the exception of Figs. 14, 



52,|and 53, magnified thirty-three times more than the scale which is 



ruled to one-tenth of a millimeter. Figs. 52 and 53 are magnified 



five times more than the scale. 



RUFUS HIRAM HATCH. 



