DEVELOPMENT OF THE ANTENN/E OF TERMn'ES. 2(35 



trace the development of the Hodotermes aiitenna3 satis- 

 factorily. The embryo, just before hatching, and the smallest 

 larvae have antennas (fig-. 5, a) which may be regarded as 

 being in stage A (PI. XV), the transition of a X to a XII 

 expression. These develop to a definite Xll-jointed organ 

 (fig. 5, h), in which III divides and exhibits an internal 

 metamorphosis (stage B). Subsequently two rudimentary 



Text-pig. 5. 



Hodotermes viator (LatreiUe). a. b. Antenna in first instar. 

 c. Second instar, d-f. Third instar. g. Large worker fourth 

 instar. 



joints, (10) and (11), abjunct (c), and stage E is arrived at. 

 This is probably the condition of the organ in the second 

 instar. Later developments, which I take to be those of the 

 third instar, are represented in fig. 5, d-f, the new joints 

 numbering thi-ee, four and eight respectively. The organ 

 illustrated by (g) is taken to be that of a larger worker of 

 the fourth instar and seems to indicate the adding during- 

 this period of an indefinite number of joints. 



