E. A. BACK, Entomologist 



and C. E. PEMBERTON, Assistant Entomologist 



Mediterranean and Other Fruit Fly Investigations 



CONTENTS 



What the Melon Fly is Like 3 



Origin and Distribution 4 



Establishment and Spread in Hawaii . . 4 



Methods of Spread 7 



Economic Importance .- 7 



Nature of Injury Caused by the Melon Fly 8 



Food or Host Plants 16 



Page 



Interesting Facts Concerning the Adult Fly 22 



Why the Melon Fly is a Serious Pest . . 24 



Control Measures 25 



Measures Taken to Keep Fruit Flies of 

 Hawaii from Gaining a Foothold in Con- 

 tinental United States 29 



Summary 30 



WASHINGTON 



GOVERNMENT PRINTING OFFICE 



1918 



