STATE AGRICULTURAL SOCIETY. 333 



APPLE. LIMBS. 



and where any wound in the bark is healing, and in autumn com- 

 mon also in the axils of the leaf stalks towards the ends of the 

 twigs; sometimes so multiplied, in European countries, as to cover 

 the whole under sides of the limbs, and also the trunk, the tree 

 appearing as though it were whitewashed; preferring trees whose 

 fruit is sweetest. 



Under each small patch of down is commonly one large female 

 and her young. The female is about 0.06 long, egg-shaped, dull 

 reddish brown, with a black head and feet and dusky legs and 

 antennas. She is dusted over with a white mealy powder, and has 

 a tuft of white down growing upon the hind part of her back, 

 which is easily detached. See Harris's Treatise, p. 193. 



AFFECTING THE LEAVES. 

 Puncturing them and extracting their juices » 



18. Apple aphis or plaxt louse, j^phis Mali, Fab. (Homoptera Apliidse. j 



[Plate I, fig. 1, the male, fig. 5, the female.] 



Small green lice without wings, accompanied by a few black 

 and green ones having wings, crowded together in vast numbers 

 upon the under sides of the leaves and the green succulent tips of 

 the twigs, the leaves becoming distorted hereby and turned back- 

 wards, often with their tips pressing against the twig from whence 

 they grow. 



The winged individuals with a black thorax and a green abdo- 

 men, having a roAV of black dots along each side, and pale legs 

 with black knees and feet. Length 0.05 to the tip of the abdo- 

 men. The wingless individuals slightly larger, with the thorax and 

 abdomen green, the legs pale, with black feet. See Trans. N. Y. 

 State Ag. Society, 1854, p. 753. 



19. Apple-leaf Avnis, j1 phis MalifoUcB^Yiich.. 



Found with tlie ])receding on apple trees in Illinois; distin- 

 guished from it by being slightly larger and having the abdomen 

 as well as the thorax black, the second fork of the wing veins 

 at its tip nearer to the end of the fourth vein tlian it is to the end 

 of the first fork, and other dilferences in the wing veins. See 

 Trans. N. Y. State Ag. Society, 1854, p. 760. 



