MODES OF FIGHTING. 17 



vent which they make the entrances small, and often 

 station at each a worker, who uses her head to stop 

 the way. The smell of this species is also, perhaps, a 

 protection. Tetramorium ccespitum has the habit of 

 feigning death. This species, however, does not rolJ 

 itself up, but merely applies its legs and antennce 

 closely to the body. 



Formica rufa, the common Horse ant, attacks in 

 serried masses, seldom sending out detachments, while 

 single ants scarcely ever make individual attacks- 

 They rarely pursue a flying foe, but give no quarter, 

 killing as many enemies as possible, and never hesi- 

 tating, with this object, to sacrifice themselves for the 

 conmion good. 



Formica aangidnea, on the contrary, at least in 

 their slave-making expeditions, attempt rather to 

 terrify than to kill. Indeed, when invading a nest, 

 they do not attack the flying inhabitants unless these 

 are attempting to cairy off pupa?, in which case the 

 F. sanguineaa force them to abandon the pupae. 

 "WTien fighting, they attempt to crush their enemies 

 with their mandibles. 



Foi'mica exsecta is a delicate, but very active- 

 species. They also advance in serried masses, but in 

 close quarters they bite right and left, dancing about 

 to avoid being bitten themselves. When fighting 

 with larger species they spring on to their backs, 

 and then seize them by the neck or by an antenna 

 They also have the instinct of acting together, tiiree 



o 



