MEMORANDA. 

 Fi-. 1. 



231 



,,,y "? 



..N 



Hooks on tlie Sycamore-apbis, magnified about 800 diameter?: 

 Fig. 2. 



a. Wing of Sycamore-aphis ; b, c, Wings of Box-aphis. 

 Fig. 3. 



Wings of Sycamore-aphis, held together by the hooks. 



