CONTENTS. 



Page. 



Introdxictory I 



Descri])tive 1 



The moth 1 



The egg 2 



The larva 3 



Distribution 3 



Notes on occurrence 4 



Attack on beets and chard 4 



Injury to ornamental plants 5 



Other records and notes 6 



Associated insects 7 



The yellow-necked flea-beetle (Disonycha viellicolUs Say ) '. 7 



The spinach flea-beetle {Disonycha xanthomelxna Dalm.) 8 



The Hawaiian beet webworm (Hymeniafascialis Cram.) 9 



Natural enemies 9 



Control 10 



Bibliography 11 



ILLUSTRATIONS. 



PLATES. 



Page. 

 Plate I. Swiss chard injured by the spotted beet webworm (Ilymenia perspec- 



tah's) 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 {Ilymnda fascialis) 8 



TEXT FIGURES. 



Fin. 1. The spotted beet webworm {Ilymenia perspectaUsr. ^loth, larva and 



details 2 



2. The Hawaiian beet webworm {Ilymenia fascialis): Wing venation, show- 



ing characters of genus; head and antenna 3 



3. The spotted beet webworm {Ilymenia perspectalis): External male 



characters 3 



7S051°— 13 III 



