Séaìicc du 1 Dcrrmbrc lUit 125 



\/a/c iavüa, 22 nwi. long. U»^"- 7^ — ^^^^ 

 autcmia is siili \cr\ short, about 3 miii., with 3o 

 or 3i joints and represents Iaiil> aeenratel> the inner 

 antenna shown in fi^-. 6. W C must therefore con- 

 elude that this larva, 22 mm. ion^, liad jiisl moulted. 

 The ncwlv I'ormod joints, derived from the notched 

 |)ortion, are still ill-deiined. In addiiton we observe : 

 1^ that, bcj;innin<,' from the Mh, the joints become 

 gradually longer and narrower; :>." that, as in the 

 antenna shown in fig. 6, darker joints alternate 

 vvith lighter; 3" that the 3rd joint, relatively very 

 long, has at this stage a fusiform appearance and a 

 median zone distinctly darkened; 4" that the broader 

 portion, from which the striated sheath will arise 

 later, does not yet shov\ any division between the 

 stalk and the lamellae of the antenna. Lnder the 

 microscope the antenna of this larva shows fairly 

 clearly the proj (action s and light-coloured circles 

 already described in the imaginai antenna. 



\ careful studv of this preparation leads us to 

 the conclusion that the first •> and the last rä joints 

 pass with ver\ little modification from the newly 

 hatched stage to that of a larva :v.i mm. long, while 

 on the contrary active growth takes place at the tip 

 of the third joint, presumablv at the expense of that 

 joint. \s there are 3i joints in this case and 78 in 

 that of the adult male, 4- new joints musi be created 

 from now onwards. 



Mcilc larva, 30 ììiììì. Ioìkj. (lig. 8). — The antenna 

 under observation is incomplete, T) or 6 being the 

 cslimated number of missini.!- joints. I have chosen 



