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This is pre-eminently the wooly genus of the sub-family, and con¬ 
tains one of our most injurious species, the Wooly Aphis of the apple 
tree. 
Schizoneitra lanigera. Hausm. The Wooly Aphis of the Apple-tree. 
Aphis lanigera. Hausm. 
Coccus mail. Bingley. 
Eriosoma mail; (Leach mss.) Samouelle. 
Myzoxylus mail. Blot. 
Schizoneura lardy era. Iiartig. 
Pemphigus pyri. Fitch. 
Aphis ( iSchizoneura) lanigera. Ratz. 
Eriosoma lanigera , Ruricola. 
I copy the following article on this species from a previous report 
I made on injurious insects, to the Illinois State Horticultural Society, 
adding at the close such new facts as I have since ascertained in 
reference to it. 
“The Sch. lanigera , or Wooly Aphis of the Apple-tree, was first 
described and scientifically named by Hausmann in 1801, as infesting 
the apple-trees of Germany. According to Serville and Amyot, it 
was unknown in Europe until 1787,at which time it was first seen in Eng¬ 
land, having been imported that year from North America. Tougard 
(Ann. Soc. cVIlort. de Paris) asserts that it w r as unknown in Belgium 
previous to 1829. The same authors also assert that it was unknown 
in France previous to 1812. Harris, relying upon the authority of 
Salisbury, (“Hints on Orchards,”) asserts that it was known to French 
gardners for a long time previous to the earliest of these dates 
\ 
Apple-root Plant-louse. 
A. Pai-t of a root infested by the Apple-root Plant-louse. B. The larva with the 
usual wooly matter attached to its back. C. The winged insect with the wooly matter 
all removed. D. Leg of the perfect insect. E. The beak. F. Antenna? of the winged 
insect. G. The antennae of the larva. 
