PLATE I. 



Fig. 1. — Entrance opening to subterranean nest of female ant. Pellets 

 of earth arranged about the opening, i nat. size. 



Fig. 2. — Vertical section through subterranean nest, after 11 days. Nat. 

 size. 



Fig. 3. — Nest in a Goeldi breeding ease; 16 days old. Nat. size. 



Fig. 4. — Sagittal section through head of Atta female, soon after leaving 

 parental nest ; mouth closed ; fungus pellet in its special cavity. Magniiied 

 about 9 times ; somewhat diagrammatic. 



Fig. 5. — Same as fig. 4; mouth parts extended to show mechanism for ex- 

 pelling fungus pellet. 



Fig. G. — Mycelium of temporary fungus garden. Magnified about 150 times. 



Fig. 7. — Eggs and fungus patch 2 days after the nuptial flight. Magnified 

 5 times. 



Fig. 8. — Same, 3 days after nuptial flight. Magnified 5 times. 



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