REPORT OF THE STATE ENTOMOLOGIST 1901 899 



31 15th report of the state entomologist, by E. P. Felt, state 

 entomologist. 



36 16th report of the state entomologist, by E. P. Felt, state 

 entomologist. 



37 Illustrated descriptive catalogue of some of the more im- 

 portant injurious and beneficial insects of New York state, by 

 E. P. Felt, state entomologist. All the bulletins except no. 36 

 were bound in one half morocco volume. 



EXPLANATION OF PLATES 



PLATE! 1 



Hessian fly Gecidomyia destructor Say 



A wheat plant showing an uninjured stalk at the left and 

 one infested with the Hessian fly at the right. The leaves 

 of the latter are dwarfed and withered and the stem is swollen 

 at three points near the ground where the " flaxseeds " are 

 located between the leaf sheath and the stem. 



a Egg of Hessian fly greatly enlarged as are all figures except 

 e and h 



b Larva, its natural size indicated by the line beside it 



c Puparium, " flaxseed " or pupal case 



d Pupa 



e Adult female ovipositing on leaf, natural size 



/ Adult female, very much enlarged 



g Male, very much enlarged 



h " Faxseeds " in position between leaf sheath and stem 



i Parasite, Merisus destructor, male, much enlarged 



All from Packard, U. S. ent. com. 3d rep't, b drawn by Dr 

 Riley, d and / by Mr Burgess, a, g, c and i by Prof. Packard. 



PLATE 2 



European willow gall midge 

 Rhabdophaga salicis Schrk. 



FIG. 



1 Breast bone of larva 



2 Dorsal view of pupal case, showing setaceous processes 



3 Distal segment of tarsus, showing claws and pulvillus from 



side 



