Smithsonian Report, 1921. — Safford. 



Plate 3. 



Acacia sphaerocephala. Thorn from Tampico, Mexico, with the Ants, 

 Larvae, and Pupae (Pseudomyrma belti var. fulvescens) Taken Out of it. 

 Received from J. M. Cuaron. X 2. Original. 



394—3 



