Si-ance du W A ir il l!>2l 



this is not Ilio cast^ in llic iiiii('(alK)la sudi as ürlhop- 

 t; la or Nciuoptera. 



In Ihoir case Ilio aulcnnai' ol llic larva ami of Ihc 

 iii:a^(» ar(> in icalilx liu" same or},"-an : inscitcd al cor- 

 HspoiMJin^'^ poinls ol' Ihc head ca[)suk', Ihey appear at 

 iirsl sibili iclcnlical. 



Novorlheloss on closer cxaiiiinaUoii it is iouiid 

 thai llic antenna ol the newly hatched insect is relati- 

 Nciy shorlcr- and l'itMincidlv possesses fewer joints. 



1^'or example, the antennae ol" ne\^ly hatched 

 lar\ae ol the ^•cuis Tcrmcit are nsnally composed of 

 IO or I I joints while those ol" the adnlt contain from 

 i() to I p. 



What is the pro(H^ss of f4-ro\\th in such cases ? 



In his \\oik. <( Co.^liiuzioììc e sviluppo della so- 

 ciclà (lei Tcnìiilìdi, 189.S », Grassi maintains that the 

 f^'-rowth of the aidennae coincides with the moults. 

 .\ccoidini:- to this autlior theie are four moults in the 

 case of the soldier and the worker and five in that of 

 the winp^ed insect. My observations on the Termites of 

 Ceylon de not confirm these conclusions- In my opi- 

 nion the soldiers and workers have only one moult. 

 I'his moult is indicated by a peculiar aspect of the 

 cuticle whicli beconu^s folded and rust-coloured in the 

 neighbourhood of the appendajics, and coincides with 

 a restincr staj^(> which lasts from 6 to 8 idays. Apart 

 from a more complete chilinization this resting or 

 nymphal static makes no chanj^e in the structure of 

 the antennae. The growth which takes place by suc- 

 cessive divisions of the third joint is already complete 

 al this stapfc, at any rate for the soldier and worker. 



In the case of the winged forms there is a second 



