580 
Wootty Apuis (Schizoneura lanigera). 
This species, in addition so secreting a honeydew, secretes a 
bluish white flocculent, cottony 
substance, which oftentimes almost 
completely conceals them, appearing 
to be tufts of cotton attached to 
leaves and twigs. This pest has been 
distributed to every apple-growing 
country, but its place of origin is 
not yet known. It is, however, one 
of the most annoying pests with 
which the apple-growers have to 
contend against. They have been 
seen infesting the branches and 
trunk of a tree, in which they form 
pits, the bark apparently ceasing 
to grow at the point attacked, 
swelling into a ridge about the 
cluster of aphides. Those that ap- 
pear above ground can be controlled 
lly Aphis, (Schizoneura lanigera) j 
ba tate yoots ; a louse (Marlatt). . Woolly Aphis on Apple Tree branch, 
