List of Illustrations in the Text 



FIG. PAG* 



258. Prodoxus y-inversa 440 



259. Prodoxus reticulata 440 



260. Prodoxus coloradensis 440 



261. Prodoxus cinereus 441 



262. Pronuba yuccasella 442 



26). Pronuba yuccasella, pupae 442 



xxii 



