6 



cane borer (the larva of Sphenophorus obscurus), that is, foot- 

 less, "fleshy" grubs, light in color, with a dark head. The en- 

 tire development after hatching from the egg is undergone within 

 the seed. When fully developed, the larva constructs a pupal 

 cell, surrounded simply by the excrement, within the tunnel 

 formed by feeding, and transforms to the pupa. The inactive 

 pupa is perfectly white in color with the developing head, legs, 

 wings and body-parts plainly indicated. . 



The length of the various stages in the life-cycle of the mango 

 weevil can be given only approximately from this year's notes. 

 In the locality under observation, the adults became active about 

 May 1 6th. The first newly hatched larvae were to be seen from 

 May 28th on. Pupae were found on June 27th and adults on 

 July 3rd. The first adult weevils seen of this year's brood were 

 those reported by Mr. Swezey, taken by him June 12th on Gulick 

 avenue, Honolulu. The mango crop in that locality, however, 

 was nearly a month earlier than at the place where the above 

 notes were taken. The life-cycle appears to be approximately 

 40 days in length and there can be but one brood a year. 



ITS HIBERNATION 



The various stages of the mango weevil were found last sea- 

 son all through July, following the discovery of the insect. Nat 

 more than one specimen was found in any one seed. During 

 August, refuse seeds and the seeds of fallen mangoes contained 

 some pupae and many adults. As late as September nth the 

 seeds beneath trees in the infested district contained adults but 

 in no great numbers. It appeared that the beetles remained in 

 the seeds for a time after completing their full development. On 

 the last date mentioned, September nth, three living adults were 

 removed from as many seeds and placed in a tightly corked phial 

 beneath a plug of cotton. On October 13th all of these speci- 

 mens were living. The writer was absent from the Territory for 

 nearly a month, but upon his return, November 15th, one weevil 

 had died. Another weevil failed to show signs of life on Janu- 

 ary 3rd. The third specimen lived until February roth. From 



