THE WOOLLY LOUSE. 



37 



time. It lays its eggs, not only upon the trunk, but sometimes 

 on the main brandies, from June to August. 



The flat-headed larvse, Fig. 32, a, works, for a time, iu the sap- 

 wood, then makes an upward burrow, and, turning, comes out iu 

 another place, just under the bark, 

 where it undergoes its changes. Fig. 

 32, b, shows it in the chry.salis state: 

 Fig. 32, d, is the perfect beetle ; Fig. 

 32, c, the head of the borer, en- 

 larged. The grubs bore through 

 the bark and in spring transform 

 into a compact, shiny, dark beetle, 

 with a coppery lustre underneath. 



Remedy. — Its presence may be 

 known in the tree in the same way 

 as the Round-headed Apple Tree 

 Borer, and the same remedy must 

 be applied. 



The use of washes upon the tnmk 

 to prevent insects from depositing 

 their eggs is of micertain value. 

 Perhaps the best of these is a solu- 

 tion of soft soap in which has been 

 mixed a teaspoonful of crude petroleum 

 tablespoonful of carbolic acid or coal tar. 



The Woolly Louse, or Aphis (Schizoneura lanigero). — Al- 

 though commonly known as the root louse, and more generally 

 found upon the roots of the Apple, it often causes much injury to 

 the branches. It is a small insect (Fig. 33), about oue-sixteeiith 



Fig. 3.", </, b, c. d. 

 t«) tlie gallon 



Fig. 33. 



to one-eighth of an inch long, and more or less covered with a 

 cottony or nearly white substance, whence comes its commoa 

 name. It attacks the branches in patches, sucking their juices, 

 and causing black, canker-like places, which spread, often destroy- 

 inof the limbs. 



