PLATE LII. 



Aphis pyraeia. (Page 53.) 



Pig. 1. — Apterous viviparous female. 



Fig. 2. — Underside of tlie same, showing the abdo- 

 minal rings. 



Fig. 3. — Young, recently born, and "without pig- 

 ment. 



Figs. 4, 5. — Varieties of the winged female. a, 

 Head and antennse of the last. 6, Portion of the 

 outer integument highly magnified, showing its corru- 

 gated character. 



