234 



W. A. SANDS 



fontanelle increasingly contrasting in colour with the darkening head, and pro- 

 gressing from depressed to protruding. At the same time the compound eyes 

 remained relatively static, so that the head appeared more broadly rounded behind 

 them, and they appeared to protrude less. Thus the species seemed to be evolving 

 rapidly, until specimens collected in 1939 were examined and found to resemble the 



642 



643 



644 



645 



Figs 634-645. Adaiphrotermes, imago head capsule, front and side views, and imago 

 mandibles. 634-637, A. choanensis; 638-641, A. cuniculator; 642-645, A. scapheutes 

 (mandibles worn). 



