24 



CORN ANP GRASS, 



Corn and Grass Aphis. Siplwnophora granaria, Kirby. 





J0M 

 1 J 



SiPHONOPHOKA GEANAEiA. — Winged female and young Aphis, magnified (after 

 Buckton) ; infested Wheat ear. 



Corn Aphis is more or less present every season on Wheat and 

 Oats, and sometimes to a seriously injurious amount; but if present 

 as a Grass pest, it is so rarely reported to the mischievous extent to 

 which it was noticed last year in the neighbourhood of Newcastle-on- 

 Tyne, that a note of the observation seems worth record. 



On the 30th of May, Messrs. S. Finney & Co. wrote me from 

 Newcastle-on-Tyne as follows, with specimens accompanying : — " We 

 beg to enclose you some Grass and Clover that have been attacked by 

 the Green Fly, which are doing an enormous amount of damage in 

 this district ; the specimens are taken from a 16-acre field, which is 

 almost totally destroyed, and they are beginning to spread to other 

 fields in the neighbourhood. They appear to be most troublesome on 

 land that has been laid away for two or three years Grass, and so far 

 they have not touched the one-year Grass and Clover." 



The large packet of specimens sent accompanying showed this to be 

 the worst case of Aphis infestation on Grass that I had ever met with ; 

 and on June 2nd, Messrs. Finney further wrote me that the Green 

 Fly appeared to be spreading rapidly to other fields in the neigh- 

 bourhood. 



On very careful examination of the Aphides sent, there did not 

 appear to me to be any reason to doubt that they were the Corn Aphis 

 or Plant Louse, scientifically the Siphonophora granaria of Kirby, also 

 known as the S. cerealis, and also as the Aphis avencB. Still, although 



