Dec. IS, 1914 



Melon Fly 



271 



Table II.— Duration of the larval stage of the melon fly 



THE PUPA 



At mean temperatures varying from 71.6° to 79.4° F., the pupal 

 stage ranges from 7I4 to 13 days, as determined by observations on the 

 1,400 pupae recorded in Table III. As the mean winter monthly tem- 

 peratures seldom fall below 70° F., 13 days is probably close to the 

 maximum length of the pupal stage during the cooler seasons in littoral 

 Hawaii. 



Table III. — Duration of the pupal stage of the melon fly'^ 



Date of pupation. 



Aug. 14, a. m . 



Do 



Do 



Aug. 17, a. m. 



Do 



Do 



Aug. 18, p. m. 



Do 



Sept. 17, a. ra. 



Do 



Sept. 20, a. ra. 



Do 



Sept. 19, a. m. 



Do 



Feb. 3, a. m. .. 



Do 



Feb. 4, a. m. .. 



Do 



Date of emergence. 



Aug. 22, a. m . 

 Aug. 23, a. m . 

 Aug. 25, a. ra . 



...do 



Aug. 25, p. m. 

 Aug. 26, a. m. 



...do 



Aug. 27, a. m. 

 Sept. 26, a. m. 

 Sept. 27, a. m. 

 Sept. 29, a. m. 

 Sept. 30, a. m. 

 Sept. 28, a. m. 

 Sept. 29, a. m. 

 Feb. 15, a. m. . 

 Feb. 16, a. ra. . 



do 



Feb. 17, a. m. . 



Average 

 mean 



tempera- 

 ture. 



°F. 



78. 

 78, 

 79 

 79 

 79.2 



79-3 

 79-4 

 79.2 

 79.2 

 79-4 

 79-3 

 79-4 



79-3 

 71.6 

 71.6 

 71.6 

 71. 6 



" Total number of pupnc imder observation: 1,400. 



