two or three years, under competent direction, I have no 

 doubt but that they may be entirely destroyed. 



" This is, in my opinion, the cheapest and surest method of 

 exterminating this pest, but its effectiveness depends entirely 

 upon the thoroughness and carefulness with which it is done, 

 and those who do the work must have authority to shower 

 the trees not only on public Ijut on private grounds. 



Description of the Insect. 

 " The males (Fig. 1) are of a yellowish brown color, with 

 two dark brown lines crossing the forewings, one at the l)asal 

 third, the other on the outer third, somewhat curved, and 

 with teeth })ointing outwards on the veins. The outer end 

 of all the wings is dark l)rown. A curved dark brown spot 

 [reiiiform) rests a little above the middle of the wing, and a 



small round spot of the same color (orbiculcn') is situated 

 between this and the 1)ase of the wing, just outside of the 

 inner cross-line. A similar spot rests near the middle of the 

 base of the wing. The fringes on the forewings are dull 

 yellowish, and broken by eight brown spots. The antenna? 

 are strongly bipectinated, or feather-like. The forewings 

 expand about an inch and a half. 



"The females (Fig. 2) are pale yellowish white, with dark 

 brown cross-lines and spots similar to those of the males. 

 The cross-lines in both sexes are much darker and more 

 prominent on the forward edge of the wings (^costa) than 

 elsewhere. In some specimens there is a faint stripe of 

 brown across the middle of the wing [median shade), and a 

 toothed line across the wing near the outer edge (subtermiiial 

 line). The fringes of the forewings have eight dark spots 

 l)etween the ends of the veins, as in the males, and similar 

 but fainter spots often occur in the fringes of the hind wings. 



