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Psyche 
[December 
ment. The American forms, moreover, may be readily separated 
into two groups, one of which, including A. mucronaia Roger, 
the type of the genus, and goeldii Forel, have tridentate claws 
and long epinotal spines, while the other, including the re- 
maining species, carinifrons Mayr, dentinodis Mayr and doJo 
Roger, have, like the Australian forms, simple claws and a 
merely dentate epinotum. In my opinion, the latter group 
should be regarded as a distinct subgenus, for which I suggest 
the name Anacanthoponera subgen. nov., with P oner a dolo 
Roger as the type. 
Few groups of ants resemble Acanthoponera in having an 
“antarctic” distribution. Perhaps the best example is the 
subgenus Notomyrmex of the genus Monomorium, which is 
represented by a number of species in Australia, New Caledonia, 
Lord Howe Island, Norfolk Island, New Zealand, a few in 
Patagonia and Chile and, according to Emery, also a few in 
Madagascar and East Africa. Mann’s subgenus Fulakora, a 
group of species of the archaic genus Stigmatomma, with ap- 
proximated frontal carinse, may also be cited in this connection 
because it is represented in the East Indies, Solomon Islands, 
New Zealand, Argentina, Chile and Southern Brazil. The 
Chilean ants of the genus Lasiophanes, which are closely re- 
lated to those of the genus Prolasius in New Zealand and of 
Melophorus in Australia afford another example. I might also 
cite the singular little hypogseic Ponerine ants of the genus 
Discothyrea, of which a few species occur in the East Indies, 
one in New Zealand, one of a closely allied genus, Prodiscothyrea, 
in Australia, a species recently discovered by Bruch in Argentina, 
one in Kamerun, one in Columbia and one which was described 
by Roger in 1863 from “North America”, but which has never 
been taken since. Apart from its occurrence in Africa, the 
distribution of this genus is not unlike that of Iridomyrmex, 
though the latter is represented by many species in Australia 
and is absent from New Zealand, though occurring on Norfolk 
Island, in the Neotropical Region and as far north as our southern 
states. When we consult the fossil record, however, we find that 
the two genera last mentioned were represented by species of 
Bradyponera and Iridomyrmex respectively in the Baltic amber 
