94 BEITISH APHIDES. 



the Aphides are solitary, at other times small com- 

 panies of eight or nine may be found herding to- 

 gether. They occur from May to October, and then 

 probably they burrow deeper and evade observation. 



Occasionally the antennal joints differ in number on 

 the two sides, thus development would seem to go 

 on at uneven rates. 



