190 
Psyche 
[December 
Var. wagneri Santschi. 
Acanthoponera mucronata var. wagneri Santschi, Bull. Soc. Vaud 
Sc. Nat. 54, 1921, p. 84 ^ . 
Type locality: Banderas, 55 km. north of Icaho, Chaco de 
Santiago del Estero, Argentina (E. R. Wagner). 
The following key may serve for the identification of the 
workers of the various forms of Acanthoponera mentioned in 
this paper: 
1. Claws tridentate; epinotum armed with spines; petiole 
terminating above and behind in a spine; constriction 
between postpetiole and gaster feeble or absent (subgen. 
Acanthoponera sens, str.) 2 
Claws simple: epinotum at most dentate or subdentate; 
petiole (except in A. lece) unarmed or merely with a 
median tooth or projection behind; constriction between 
postpetiole and gaster well-developed, (subgen. Ana- 
canthoponera subgen. nov.) 6. 
2. Frontal carinae and adjacent scrobes extending around the 
posterior corners of the head and terminating under the 
eyes; funicular joints 2-5 at least twice as broad as 
long; epinotal spines curved downward 3 . 
Frontal carinae and scrobes terminating at posterior corners 
of head; scapes more slender, funicular joints 2-5 some- 
what broader than long 4 . 
3. Petiolar spine shorter than the epinotal spines; constriction 
between postpetiole and first gastric segment distinct; 
these segments aciculate, subopaque. Length 4.9-5 mm. 
(Brazil) goeldii Forel. 
Petiolar spine as long as the epinotal spines; constriction 
between postpetiole and first gastric segment absent; 
these segments shining, finely punctate. Length 4.5 mm. 
(Guatemala) subsp. schwarzi subsp. nov. 
4. Epinotal spines curved inwards. Length 8 mm.; female 
10 mm. Postpetiole and first gastric segment punctate- 
rugulose, subopaque. (Brazil) mucronata (Po^er,) 
Length 6 mm. or less 5 . 
