ARRANGEMENT OF A NEST. 



43 



Fig. 2. 



Ground-plan of a typical nest of Lasins niger, reduced, a, 

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

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

 cial pillars. 



