DEVELOPMENT OE TlIM ANTKNN.E OF TERMITRS. 275 



or IV of the XVII expression is a (15 + 14) compound 

 {fig. 8, c, d). This shows a development tliroiigh J and JK 

 to JVb, giving" an XVIII-jointed organ in which III comprises 

 (0000 + 17), or to JM, giving a XVII-iointed organ with III 

 comprising (0000 + 17 + IG). The comparative shortness of 

 III in the XVII organ is due to the arrested state of the 

 •elements. 



Minor Worker. — These XVII expressions (fig. 8, e) I 

 take to represent a development through J to JK, and the 

 difference between this and tiie XVII major organ {d), as apart 

 from size, is traceable to the curtailed development of III. 



Antennal formulae (including aberrant soldier untennte of 

 'T. b ellicosus) : 

 Imago : 

 XIX : I II III (U0i)()-f-17) IV (IH) V (1-5) VI (14) VII (13) ; 



fig. 7, a ; fig. 8, a 

 Soldier : 

 XIX : I II III (0000 + 17) IV (16) V (15) VI (U) VII (13) ; fig. 7, b 

 XVIII: III III (0000 + 17) IV (16) V(15+ 14) figv'.e,/ 



XVIII : I II III (0000+17 + 16) IV (1.5) V (14) fig. 7, c 



XVII : I II III (0000 + 17 + 16) IV (15+ 14) V (13) ; 



fig. 7, d,h; fig. 8, h 

 Major worker : 

 XVIII : I II III (0000) IV(17 + 16) V (15 + 14); fig. 8, c 



XVII : I II III (0000 + 17+ 16) IV (15 + 14) ; fig. 8. d 



Minor worker : 

 X Vll : I II III (0000) IV (15 + 14) ; fig. 8, e 



(5) Odontotermes latericius [Haviland). Fig. 9, a-m. 



Antennal Index. — Imago XIX ; major worker XVIII, 

 XVII; minor worker XVII; soldier XVII, XVI (XV). 



This is a species from which the major soldier caste appears 

 to have been eliminated. 



imago. — The antenna? have been found to be regularly 

 XlX-jointed (fig. 9, a) and are somewhat characterised by 

 the shortness of joint III. Short as III is it may occasionally 

 exhibit a notch on one side as it does in the antennte of 

 T. bellicosus and natalensis. This may be taken as 

 indicating a suppressed tendency to be XX-jointed. 



