List of Illustrations in the Text 
FIG. PAGfc 
258. Prodoxus y-inversa . . . • . . . . . . . . . 440 
259. Prodoxus reticulata.. . . : . 440 
260. Prodoxus coloradensis.440 
261. Prodoxus cinereus . . . . . . ..... . 441 
262. Pronuba yuccasella ..... . ... . . . . . .442 
26Pronuba yuccasella, pupae . . . . . . . . ... 442 
xxn 
