ILLUSTRATIONS. 



PLATES. 



Page. 

 Plate I. Swiss chard injured by the spotted beet web worm (Hymenin perspec- 



talis) 4 



II. Sugar beets sho\ving injurj- 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 HsiwaVianheet worm {Hymenia fascialis): Wing venation, showing 



characters of genus; head and antenna :i 



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 



1, line 6 from bottom, for Walw. read Walk. 

 Page 1, line 6 from bottom, for pharsiusalis read phrasiusalis. 

 Page 7, line 2 from bottom, for xanthamelxna read xanthomeliena. 



IV 



