IKNOXIOUS INSECTS. 



THE HELLGRAMMITE "PhY—Corydalus cornuius (Linn.). 

 (Ord. Neueoptera, Fam. Sialid.^.) 



[Fig. 69.] 



This immense fly and its larva have been sent to me by Walker 

 Evans, of Moselle, R. E. Pleasant, of Louisiana, and others in differ- 



