MANN: THE ANTS OF BRAZIL. 439 



Described from several workers and soldiers, Madeira-Mamore 

 Camps 39 and 46. This very distinct and striking species is related 

 to P. hergi Ma}T and P. oxyops Forel, but is quite distinct from 

 either. From P. hergi the soldier differs in the much longer antennal 

 scapes, the more slender club, the differently shaped epinotum, which 

 in P. hergi 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. hergi. 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 Para, Abuna, and 

 IVf adeira-Mamore Camp 39, where it occurred commonly in populous 

 colonies beneath logs. 



93. Pheidole {Pheidole) fimhriata Roger. 



A single soldier of this characteristic species was found at Ceara- 

 Mirim, and a female at Madeira-Mamore Camp 39. 



94. Pheidole (Pheidole) flavens Roger. 

 Natal, Ceara-Mirim, Independencia, and Para. 



95. Pheidole (Pheidole) flavens subsp. exigtia Mayr. 

 Taken at Ceara-Mirim and Independencia. 



96. Pheidole (Pheidole) colohopsis, sp. nov. 

 Plate 3, figs. 25, 26. 



Female (dealated). Length 4 mm. 



Head, excluding mandibles, a little longer than broad; broadest 



