1949] 
Gregg — Pheidole rhea 
73 
In view of the fact that Wheeler described rhea from a 
lone female, the marked variability of the other castes 
subsequently obtained, and the lack of females definitely 
known to be from the same colony as the series of soldiers 
and workers in the Nogales nest, it is advisable to with- 
hold description of a new form unless indicated otherwise 
by additional material. 
Literature Cited 
Smith, M. R. 
1943. Pheidole ( Macropheidole ) rhea Wheeler, a valid species. Proc. 
Ent. Soc. Wash., 45: 5-9. 
Wheeler, W. M. 
1908. The ants of Texas, New Mexico and Arizona. Bull. Amer. Mus. 
Nat. Hist., 24: 399-485. 
1915. Some additions to the North American ant-fauna. Bull. Amer. 
Mus. Nat. Hist., 34: 389-421. 
