Smithsonian Report, 1921.— Safford. 



Plate 2. 



Acacia cornigera. Leaf of a Growing Plant at Washington, with Crater- 

 like. Elongated Nectar Gland on Petiole and Numerous "Beltian 

 Bodies" on Tips of Leaflets, which Are Gathered by the Ants and Fed 

 to Their Young. X VA. Original. 



394—2 



