ILLUSTRATIONS 
PLATES. 
Page. 
Plate I. Entrance holes of larvae 12 
II. Fig. 1. — Banded tree and near-by fence. Fig. 2. — Post of fence shown 
above, with splinters removed 12 
III. Fig. 1. — Portion of fence post, showing old pupa skins. Fig. 
2. — Cocoons in cracks in bark 12 
IV. Fig. 1. — Piece of bark, showing moth just emerged, and old pupa 
skins. Fig. 2. — Band on which the remains of 330 cocoons were 
counted 16 
V. Yiew T s in orchard of Hon. Edgar Wilson, showing location of apple 
house in relation to orchard 20 
TEXT FIGURE. 
Fig. 1. Map of Pacific Northwest, showing life zones 9 
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