. Circulaire. Les insectes. L'APHIS APPLE POSY. L'APHIS (malifolise Fitch.) l'Aphis rose du pommier (fig. 6), considéré par comme Ajjhis Pergande mali- folise Fitch, et déterminé par l'Aphis sorbi Sanderson, Kaltenbach, se distingue du précédent par sa taille plus grande, plus rond, corps et généralement de couleur rose, qui, cependant, peut varier du saumon à tan ou même de gris ardoise ou noir, le corps étant recouvert d'un pulverulence blanchâtre. Cette espèce est très généralement distribué aux États-Unis, se produisant dans de tels États largement séparés comme Illi- nois, Connecticut, New Jersey, New York, lave

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. Circular. Insects. THE POSY APPLE APHIS. (Aphis malifolise Fitch.) The rosy apple aphis (fig. 6), regarded by Pergande as Ajjhis mali- folise Fitch, and determined by Sanderson as Aphis sorbi Kaltenbach, is readily distinguished from the preceding by its larger size, rounder body, and usually rosy color, which, however, may vary from salmon to tan or even to slaty gray or black, the body being covered with a whitish pulverulence. This species is very generally distributed in the United States, occurring in such widely separated States as Illi- nois, Connecticut, New Jersey, Virginia, Washington, California, South Carolina, and West Virginia; it occurs also in Canada. The species is common on apple, but has been taken by Sanderson on pear.. Fig. 6.—Rosy apple aphis (Aphis malifolix): a, winged agamic form; b, pupa: c, wingless agamic- form; d. recently born aphis. All greatly enlarge 1 original). In Europe the food plants of Aphis sorbi, in addition to apple, are Crataegus oxyacantha, Sorbus auouparia, S. domestica, and S. torminalis. LIFE HISTORY. The life history of this species is but imperfectly known. Winter eggs are deposited in the autumn by sexual females, and more often on the trunk and larger limbs than with the other species mentioned. They hatch in spring as the apple leaves are pushing out, and the young aphides infest the young leaves and later the tender shoots and foliage, the latter thus becoming usually badly curled. Three generations from the egg are said to occur on the apple in the spring, man}T individuals of the second and third generations developing wings and migrating to other trees and to other host plants. After the third generation the apple is deserted by the insects until fall, when the return migrants appear and give rise to the true sexual forms, the females depositing eggs as described. [Cir.Sl]. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration

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