AERANUEMENT -OF A NEST. 



43 



Fig. 2. 



GrrouTid plan of a tjpioal nest of Zasins niger, rediTced. a, 

 narrow doorway ; *, hall ; c, vestibule ; d, main chamber ; e, inner 

 sanctum ; f,f,f,f, narrow entrance passages to sanctum ; g, g, spe- 

 cial pillars 



