1899] 



ENTOMOLOGICAL SOCIETY. 



31 



The Chinch-bug (BUssus leucopterus) Fig. 2, caused a loss in the 

 State of Illinois alone cf seventy-three millions of dollars in a single 

 year by its destruction of corn and wheat: crops. 

 It is now controlled to a large extent by means 

 of a fungous disease which is disseminated by 

 distributing affected individuals wherever the bug 

 is numerous. Fortunately for us this insect is 

 rarely found in Canada and has never done any 

 harm to our crops. 



The Hessian Fly ( Gecidomyia destructor, 

 Say ) Fig. 3, is doing considerable damage in the 

 wheat fields of Ontario to-day. In some parts 

 Fig 2. Chinch-bug f Manitoba it is also doing great iniury, destroy- 



magmfied; the hair line . c n , , . i. £ It. 



below shows natural ^g from five to twenty percent, of the crop, 

 size. There it has only one brood in the year, but 



here and. further south there are two. 



Fig. 3. Hessian Fly 

 greatly magnified. 



: 



Fig. 4. Polyphemus Moth, female, natural size. 



The Polyphemus Moth (Telea polyphemus Linn) Fig. 4, a very handsome insect, 

 whose larva feeds largely upon elm. The caterpillar eats out a large portion from one 

 side of a leaf, and, when resting, fills the space with its body. The colour matching that 

 of the leaf, and the serrated outline of the creature's back corresponding closely to;the 

 original leaf, afford it a remarkable protection against ordinary enemies. 



f||&/ 



Tolj pl.emus Caterpillar. 



