lOO 



REPORT OF THE STATE ENTOMOLOGIST I92I 



ber from 80 to 150 upon the young growing parts of the host plant, 

 the Hfe cycle being completed in 40 to 50 days in greenhouses at a 

 temperature of 70° F. The subsequent infestation may be so 



Fig. I Thurauia aquatica 

 Rubs., ovipositor greatly enlarged, 

 the tip more enlarged (original). 



severe in young plants 3 to 5 inches high as to result in greatly 

 enlarged, irregularly swollen stems (these sometimes being twice 

 their normal diameter), deformed rudiments of leaves caused by 

 an arrested development, and a failure to produce blossoms, the 

 infested plants making an ill-shaped head. 



