10 
BRITISH APHIDES. 
These alate forms show most of the characteristics of 
the original larvse. Thus their antennse, legs, siphun- 
cles, and rostra are similarly constructed. Conse- 
quently, in the system based on the nature of the 
metamorphoses of insects, and the terminology of 
Professor Westwood, Aphides are ranged under the 
comprehensive head Homomorpha. 
