MANN: THE ANTS OF BRAZIL. . 489 
Described from several workers and soldiers, Madeira-Mamoré 
Camps 39 and 46. This very distinct and striking species is related 
to P. bergi Mayr and P. oxyops Forel, but is quite distinct from 
either. From P. bergi the soldier differs in the much longer antennal 
scapes, the more slender club, the differently shaped epinotum, which 
in P. bergi is broadly depressed, and in the much smaller size of the 
epinotal spines. Pheidole wallacei is a larger and more slender species. 
The structure of the worker’s head, long drawn out behind, and the 
very slender thorax and epinotum, and the small size of the spines 
distinguish it from the worker of P. bergi. The worker of the latter 
species has the meso- and epinotum granulously punctate and 
subopaque instead of smooth and shining as in P. wallacei. The 
worker has extremely long legs. Those which I observed were on 
the ground and entering a hole beneath a tree, where the nest was 
probably located. 
92. Pheidole (Pheidole) opaca Mayr. 
Numerous workers, soldiers and females from Parad, Abunda, and 
Madeira-Mamoré Camp 39, where it occurred commonly in populous 
colonies beneath logs. 
+ 
93. Pheidole (Pheidole) fimbriata Roger. 
A single soldier of this characteristic species was found at Ceara- 
Mirim, and a female at Madeira-Mamoré Camp 39. 
94. Pheidole (Pheidole) flavens Roger. 
Natal, Cear4-Mirim, Independencia, and Para. 
95. Pheidole (Pheidole) flavens subsp. exigua Mayr. 
Taken at Cearé-Mirim and Independencia. 
96. Pheidole (Pheidole) colobopsis, sp. nov. 
Plate 3, figs. 25, 26. 
Female (deilated). Length 4 mm. 
Head, excluding mandibles, a little longer than broad; broadest 
