326 



STRUCTURE AND LIFE HISTORIES 



Fig. 232. — Diagram of a nest of a fungus-growing ant {Trachymyrmex 

 obscurior), showing four chambers. The pendant white masses in three 

 of the chambers are the mycelium of the fungus — the so-called "fungus- 

 gardens." The species of the fungus has not been definitely determined, 

 but they are thought to belong to the Ascomycetes. (After W. M. 

 Wheeler.) 



Fig. 233.— Epiphytes or "air" plants {Tillandsia sp.), growing on tele- 

 phone wires at Ponce, P. R, 



