THE 



TRANSACTIONS 



OF THE 



ENTOMOLOGICAL SOCIETY 



OF 



LONDON 



For the Year 1887. 



I. Cecidoniyia destructor, Say, in Great Britain. B} r 

 Eleanor A. Ormerod, Consulting Entomologist 

 to the Royal Agricultural Society of England. 



[Read December 1st, 1886.] 



As I have now completed the series of observations from 

 life of the Cecidomyia destructor, Say, in Great Britain, 

 I beg to offer a short account of my procedure. I 

 submitted my earl} 7 specimens and my opinions to our 

 much honoured Life President, Prof. Westwood, whom I 

 knew to be in possession of specimens, and who did me 

 the favour to examine the injured corn and the charac- 

 teristic puparia forwarded, and to confirm my determi- 

 nation. A short history of the attack is as follows : — 



On the 28th of July I received specimens from 

 Bevell's Hall, Hertford, of injured barley, which on 

 examination precisely corresponded with the condition 

 caused by attack of the Cecidomyia destructor, commonly 

 known as the Hessian Fly. On investigation on the 

 spot I found the puparia fixed beneath the sheathing- 

 leaf just above the second joint, in the manner described 



TRANS, ENT. SOC. LOND, 1887. — PART I. (APRIL). B 



