Smithsonian Report, 1921. — Safford. 



Plate 15. 



Acacia Ants from Nicaragua, Inhabiting the Hollow Thorns of Acacia 



COSTARICENSIS. At THE TOP, ACACIA BELTI VAR. FULVESCENS CALLED 



"hormiga roja"; in the center, crematogaster brevispinosa, "hor- 

 miga degenerada"; below, pseudomyrma belti. "hormiga negra 

 brava." Received from President Chamorro of Nicaragua. Enlarged 

 Nearly 14 Diameters. Original. 



394—15 



