52 
Psyche 
[June 
Smith, M. R. 
1951. Two new ants from western Nevada. Great Basin Nat., 11:91-96. 
Wheeler, W. M. and W. S. Creighton 
1934. A study of the ant genera N ovomessor and Veromessor. Proc. 
Amer. Acad. Arts Sei., 69:341-387, 2 pi. 
The Ant Cerapachys rufithorax and its Synonyms — 
Dr. J. W. Chapman has given me a series of Cerapachys 
taken as a uninidal lot in the Cuernos Mountains, near 
Dumaguete, Negros Or., Philippine Islands, and has kindly 
called my attention to the remarkable variation in size 
and form shown by its members. This variation is clearly 
allometric, and affects most importantly the profile of the 
alitrunk and thickness of the petiole and postpetiole. C. 
rufithorax, C. negrosensis and C. nitida, all described from 
the Cuernos Mts. (450-700 M. altitude) by Wheeler and 
Chapman (types in Museum of Comparative Zoology) 
were found to correspond to different segments of the 
uninidal sample as arranged according to size, so that it 
is evident that the three names represent size-classes of 
a single species. Formal synonymy follows. 
Cerapachys rufithorax Wheeler and Chapman 
Cerapachys rufithorax Wheeler and Chapman, 1925, Phil- 
ippine Jour. Sci., 28: 50, pi. 1, figs. 5, 6, 7, worker. 
Cerapachys negrosensis Wheeler and Chapman, 1925, ibid., 
p. 51, pi. 1, fig. 8, worker. New synonymy. 
Cerapachys nitida Wheeler and Chapman, 1925, idem, p. 
52, pi. 1, figs. 9, 10, worker. New synonymy. 
Size differences with allometry serve as specific differ- 
ences to separate other Cerapachyinae, so that we may 
expect further synonymic reduction as adequate series be- 
come available. — William L. Brown, Jr., Museum of 
Comparative Zoology. 
