546 



SAUBA ANTS. 



There appear to be three orders of workers among them, 

 greatly differing in size. One order has an enormously large 

 head ; the head of another is very highly polished ; while 

 that of a third is opaque — to enable it, apparently, to peiform 

 the duties of a subterranean labourei-. The earth of which 

 the domes of the sauba ants are composed is brought up from 

 a considerable depth below. There are immerous entrances 



AN ANT-HILL. 



leading to the galleries, but, under ordinary circumstances, 

 they are kept closed. The smaller • galleries lead, at a 

 depth of several feet, to a broad, elaborately-worked tunnel 

 of four or five inches in diameter, which conducts downwards 

 to the centre chamber ; the abode of the royal pair, on whom 

 devolves — as is the case with the termites — the duty of pro- 



