DEVELOPMENT OF THE ANTENN/E OF TERMITES. 295 



(12) Microceroterines (parvus group). 



Antennal Index. — Imago XIV, XIII ; soldier XIII; worker 

 XIII (XII). 



The ab ovo expression of the antenna; of this group is 

 stage A. They are X expressions in which III is triloculate. 



The Xll-jointed worker organs represent a development 

 to stage C, and there is usually a faitit articulation in IIJ 

 illustrating a development towards D by the abjunction of 

 (10). The XIII expressions of the soldier and workers 

 represent a development to stage Db. 



The antennae of the imago are usually Xlll-jointed. In 

 them III may show a small, clear ring of chitin, a mere 

 vestige of a pseudo-articulation, or it may exhibit an annula- 

 tion near its base. The XIY oi'gans are rare and characterised 

 by a minute III. Both XIII and XIV represent a develop- 

 ment through D, the XIII being derived by the abjunction of 

 (10) (stage Db) and the XIV by the subdivision of III into 

 three joints (stage F). 



