1923] Ants of the Gejiera Myopias and Acanthoponera 177 
and this suggests that they were cosmopolitan groups, possibly 
of northern origin, which now survive in the tropics and mainh- 
in the southern hemisphere. I maintain, therefore, that the 
same explanation may account for the present peculiar and 
restricted distribution of Acanthoponera, Notomyrmex and 
Fulakora, since these, too, may have had a northern Eurasian 
origin during Cretaceous or early Tertiary times. Mann has 
recently discovered in Bolivia a species of the archaic Ponerine 
genus Probolomyrmex (P. boliviensisY , previously known only 
from a species in South Africa (P. fitiformis Mayr). These, too, 
in my opinion, may be isolated survivors of a group which had 
its origin in the northern hemisphere rather than on an antarctic 
land-mass or on a land-bridge between Africa and South America. 
Genus Myopias Roger 
Myopias tasmaniensis sp. nov. 
(Fig. 1.) 
Worker. Length 3.8-4 mm. 
Head subrectangular, as broad as long, slightly narrower 
behind than in front, with nearly straight sides and feebly, 
broadly concave posterior border. Eyes very small and flat. 
Fig. 1. Myopias tasmaniensis sp. nov. worker, a, head from above; b, thorax and ab- 
domen in profile. 
situated more than their own length from the posterior border of 
the clypeus, consisting of hardly more than 15 minute, crowded 
iPsyche 30, 1923 p. 16, Fig. 2. 
