CONTENTS 



Xlll 



PAGE 



Sweet potato leaf -roller . . . . , . .241 



Sweet potato white-fly 242 



Other sweet potato insects 242 



CHAPTER XIII 



Onion Insects ......... 243 



Onion maggot 243 



Onion thrips ......... 245 



Barred-winged onion fly ...... . 249 



Black onion fly 250 



Other onion insects 250 



CHAPTER XIV 



Insects Injurious to Minor Vegetable Crops . . . 251 



Rhubarb 251 



Okra 253 



Salsify 255 



Pepper 255 



Water-cress .......... 257 



Lettuce 258 



CHAPTER XV 



