ILLUSTRATIONS. 
PLATES. 
Page. i 
Plate I. Swiss chard injured by the spotted beet webworm (Hymenia perspec- 
talis) 4 
II. Sugar beets showing injury from combined attack of spotted beet 
webworm and spinach flea-beetle 4 
III. Swiss chard in same row as shown in Plate I, not attacked by the 
spotted beet webworm, but showing mild attack by the spinach 
flea-beetle 4 
IV. Fig. 1. — Male and female moths of the spotted beet webworm. Fig. 
2.' — Moth of the Hawaiian beet webworm (Hymenia fascialis) 8 
V. Field sprayer suitable for spraying sugar beets 16 
TEXT FIGURES. 
Fig. 1. The spotted beet webworm (Hymenia perspectalis): Moth, larva, and 
details 2 
2. The Hawaiian beet worm (Hymenia fascialis) : Wing venation, showing 
characters of genus; head and antenna 3 
3. The spotted beet webworm (Hymenia perspectalis): External male 
characters 3 
4. The striped beet caterpillar (Mamestra trifolii): Moth, caterpillar, pupa. 14 
5. The striped beet caterpillar: Eggs 14 
ERRATA. 
Page 1, line 6 from bottom, for Wahv. read Walk. 
Page 1, line 6 from bottom, for pharsiusalis read phrasiusalis. , 
Page 7, line 2 from bottom, for xanthamelxna read xanthomelxna. 
IV 
