Plate A. 



1. Cecidomyia ulmi, Beuten . 



2. Lasioptera corni, Felt. 



3. Cecidomyia balsamifera, Lintner. 



4. Hormomyiacratsegifolia, Felt. 



5. Choristoneura perfoliata, Felt. 



6. Choristoneura flavolunata, I'elt. 



7. Rhabdophaga batatas, O.S. 



8. Agromyzaa'iieiventris, Fallen. 



9. Khabdophaga noduln.s, Walsh . 



