64 HESSIAN-rLY. 



ncra Formica, Termes, &c., to which also it bears some re- 

 semblance in point of form and appearance; this has led 

 many to suppose that the Hessian-fly is in reality no other 

 than a species of pissmire in the apterous state. T. Say, 



Explanation vf the Plate. 



Plate 3. Fig. 1. Cecidomyia destructor at rest, natural 

 size. 



Fig. 2. Do. with the wings extended, natural size. 



Fig. 1. b. Do. Female magnified. 



Fig. 2. a. Do. Male do. 



Fig. 3. Antennae, c. Antenna of the male. h. Antenna of 

 the female. Both magnified. 



Fig. 5. A plant of wheat with the culms cut off near 

 the root; the vaginae of the leaves of two of them are 

 stripped down to show the situation of the pupa and larvae 

 just above the root. a. a. Larvae and Pupa, the three cen- 

 tral stalks are represented as punctured by the Ceraphron 

 to deposit her eggs in the larva within. 



Fig. 6. A section of the culm with two of these in- 

 sects in the pupa, or, as it is usually termed, flax-seed state, 

 magnified. 



Fig. 7. The Ceraphron destructor at rest, natural 

 size. 



Fig. 8. The same flying. 



Fig. 9. Male do. magnified. 



Fig. ro. Female do. do. 



Fig. 11. Antennae, a. that of the male, h, that of the fe' 

 male, both magnified. 



PJiLVTEl) FOR TUB SOCIETY BY T) HEJRTT, 



Andsoltlhv rilOMAS DOBSON AND SOX, Na 41 South Second-StrreU 



and CALEB RlCUAKDSOX, No. 1 North t'ourlh-Sticel 



