THE MEDITERRANEAN FRUTT FLY. 3 



ESTABLISHMENT AND SPREAD IN HAWAII. 



The presence of the Mediterranean fruit fly in the Hawaiian Islands 

 was first discovered at Honolulu on June 21, 1910, and by the fall 

 of that year the pest was well established in the Punchbowl district 

 of the city. By October, 1911, it was found on the Island of Kauai, 

 and by January, 1912, on the Island of Molokai and in the Kohala 

 district of the Island of Hawaii (see fig. 3). During March, 1912, 



Fig. 2.— Longitudinal section of grapefruit showing destruction of pulp caused bylarvte of Mediterranean 



fruit fly. (Original.) 



the Kona district was found infested, and by May of the same year 

 the fruit fly was discovered for the first. time on the Island of Maui. 

 The towns of Naalehu and Hilea of the Kau district of Hawaii were 

 infested by March, 1913, and by the early months of 1914 infesta- 

 tions were found in the Hilo and the Hammakua districts of the same 

 island. By July, 1914, or four years after its first discovery at Hon- 

 lulu, the pest had spread to every important island of the Territory 

 of Hawaii and to-day is well established in every village and wild 

 guava scrub. 



