Bui. 491 , U. S. Dept. of Agriculture. 



Plate XXII. 



Wild Host Plants of the Mediterranean Fruit Fly (Ceratitis capitata) and 

 of the Melon Fly (Bactrocera cucurbitae). 



The cactus (Opuntia) and Chinese cucumber (Momordica) prow wild in pasture lands on the Island 

 of Hawaii, the one furnishing food for the Mediterranean fruit fly and the other for the melon 

 flv. In these two hosts these flies are capable of subsisting in areas unfit for cultivation. 

 (Original.; 



