ARRANGEMENT OF A NEST. 43 



FlO. 2. 



Gronnd-plan of a typical nest of /.<i*iu* nigrr, reduced, a, 

 narrow doorway ; b, ball ; r, vcstibul.- ; d, main chamlx-r ; e, inner 

 sanctum ; /././,/. narrow entrance passages to sanctum ; y, y, pe- 



. 



