THE APHIDES OF GUERNSEY. 89 



Thelaxes dryophila, West. Two specimens found by Mr. E. D. Marquand 

 on oak leaves on tlie Cliffs at Petit Bo. The wings, unlike those of the 

 majority of Apliides are carried horizontally and folded one over the 

 other, when at rest. 



CHERMESIN^. 



Chermes eortiealis, Kalt. Abundant on a species of pine at 8. Martin's. 



They form numerous tufts of a white cottony substance at the bases of 



the green needle-like leaves. 

 Phylloxera punctata, Lk-ht. Very numerous on the undersides of oak 



leaves at St. Andrew's on August lOth. The eggs are laid in concentric 



circles. 



RHIZOBIIN-S. 



FoFda formlearia, He yd. Often to be found at the roots of grasses in 

 ants' nests ; in sandy soils, near L'Ancresse, &c. The ants are fond of 

 the clear liquid that exudes from the dorsal pores. 



