54 THE POTATO. 



(Gortyna flavago), pale flesh colour, dotted with black and 

 shining warts; the Dot Moth (Mamestra persicaria), 

 green, pinkish brown, striped with white; the Rustic 

 Shoulderknot (Apannea basilinea), brownish, with a 

 yellow line, and black dots; and the Dark Brocade 

 (Hadena adusta), green or purplish-green, smooth and 

 waxy in appearance. These, however, do no serious 

 damage. 



Potato Frog Fly (Eupteryx solani). A small green- 

 ish fly which may be seen hopping about the potato foliage 

 in August and September. By means of a beak or ros- 



POTATO FROG FLY. 



trum they pierce the cuticle of the leaven and suck out the 

 sap. The females lay their eggs on the undersides of the 

 leaves, and from these are hatched little green larvae, which 

 also pierce, the cuticles of the leaves, and feed upon the 

 sap. By this means the cellular tissue becomes ruptured, 

 and the growth of the plant severely checked. The flies 

 have a habit of running to the opposite side of the leaf or 

 stem when disturbed in dull weather, and of hopping away 

 in sunny weather. 



KEMEDIES. If very numerous, spray with an insecticide, 

 otherwise do not bother about them. 



