How Animals Work. 



it. Next in order comes the Eciton vastator, which has 

 no eyes, although the collapsed sockets are plainly 

 visible ; and lastly the Eciton erratica, in which both 

 sockets and eyes have disappeared, leaving only a faint 

 ring to mark the place where they are usually situated. 



Eciton Ant. 







The armies of Eciton vastator and Eciton erratica move, 

 as far as I could learn, wholly under covered roads, the 

 ants constructing them gradually but rapidly as they 

 advance. The column of foragers pushes forward step 

 by step, under the protection of these covered passages, 

 through the thickets, and on reaching a rotting log or 



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