2 5 2 



.L\TS. 



Savage has also recorded some observations on the behavior of the 

 various castes of .Inoiiuna workers. The large soldiers with falcate, 

 unidentate mandibles defend the colony or seize and rend the prey. 

 The latter office is also performed by the intermediates, which have 

 multidentate jaws. The small workers, however, confine themselves 

 to carrying the brood and other burdens. ' They carry their pup?e and 

 prey longitudinally under their bodies, held firmly between their man- 

 dibles and legs, the latter of which are admirably calculated by their 

 length and slenderness for this purpose." The pupae are nude, at least 

 in nearly all the species of Dorylii. 



The large males and females have been very rarely observed in the 

 nests. Savage saw a number of dealated males of Anoniiua nhjricans 

 marching in file with the workers. He endeavored to divert some of 



them from their companions but 

 they kept returning. This obser- 

 vation is of considerable interest, 

 because the males of all other ants 

 show no ability to return to the 

 colony or the nest, nor do they 

 voluntarily accompany the workers 

 on their foraging expeditions or 

 migrations. It is said that the 

 males of Dorylns leave the nests at 

 night as they are often found about 

 lights, but according to [Marshall 

 and Rrauns the males of D. fim- 

 briatus (Fig. 142) and brevipennis 

 are expelled by the workers and at 

 once take flight. This expulsion 

 requires several days and does not 

 necessarily take place at night. 

 Marshall succeeded in finding a 

 nest of fimbriatns containing a 

 female and several males. It con- 

 sisted of a broad, spheroidal cavity in the earth, about 70 cm. in 

 diameter and completely filled with a damp, friable mass of earth perfo- 

 rated throughout with tenuous galleries. The cavity was connected with 

 the surface by means of five or six galleries 15 to 25 mm. in diameter. 

 Brauns believes that such nests are excavated and occupied only during 

 the breeding season. There seems to be only a single female to each 

 Dorylus colony and she is dragged along by the workers when they 

 migrate. Evidences of this habit are seen in the scratched ventral 



FIG. 144. JEnictits grandis of 

 Lower Burma. (Bingham.) a, Male; 

 b, head of same. 



