May, 1918] 



Parasites of Leaf-Hoppers 



255 



elongate oval and white in color being 3 mm. long and 1 1-3 mm. 

 wide. Soon after the cocoon is completed, generally within 

 three days, the larva pupates. The pupa is typical, being 2^/2 

 mm. in length and .9 mm. wide. In from nine to eleven days 

 during the summer and in twenty-six days during the fall, the 

 adult issues through a hole at or near one end of the cocoon. 

 The entire time spent in the cocoon varies from fourteen to 

 seventeen days during the summer and from twenty-four to thirty- 

 five days during the fall. Males are as numerous as females. 



There are two generations a year in the latitude of northern 

 Ohio and three in the vicinity of Columbus, larvae of the third 

 hibernating within the cocoons. 



