PLATE I. 



Hymenopterous Lary.e. 



1. Croesus latitarsus Nort., on birch. 



2. Giant Sawfly, Cimbex americana Leach. 



3. A Sawfly larva, possibly (Pteronus ) Pteronidea ventralis Say. 



feeding on willow. 



4. Tomostethus (Monophadnus) bardus Say, on ash. 



5. Peach Sawfly, Pamphilius persicus MacG. 



All natural size. 



