PLATE X. Aphididae. 



1. Tamelia cozveni Cockerell, — blackberry gall aphid, showing 



galls formed on the leaves of bearberry. Normal leaf at 

 left. 



2. Tamelia quercifoliae Gillette, — woolly oak aphid, showing 



appearance on oak leaf. 



3. Phyllaphis fagi Linnaeus, — woolly beech aphid, showing colo- 



nies on leaf of copper beech. 



All natural size. Photographed by Dr. A. C. Baker. 



