1923 ] Ants of the Genera Alyopias and Acanthoponera 
183 
sides convex, its anteroventral edge with a transverse tubercle. 
Gaster small and short, much smaller than the postpetiole, the 
first segment convex above, semicircular, scarcely longer than 
broad, enveloping the remaining segments which are very small 
and together form a downwardly directed cone. Sting small. 
Legs rather long and stout; tarsal claws simple. 
Opaque; mandibles somewhat shining, finely striate and 
coarsely punctate, the striae and punctures more numerous near 
the apical border. Clypeus finely and indistinctly punctate- 
rugulose. Head between and behind the frontal carinse coarsely 
and divergently longitudinally rugose, with coarse punctures, or 
foveolae in the interrugal spaces; sides of head with the rows of 
foveolae more distinct. Thorax, petiole, postpetiole and first 
gastric segment coarsely rugose and foveolate, the rugae vermicu- 
late and reticulate on the pronotum and petiole, longitudinal on 
the mesoepinotum, including the epinotal declivity, mesopleurae, 
postpetiole and first gastric segment, most sharply on the two 
latter regions. Terminal gastric segments smoother and some- 
what shining; scapes and legs subopaque, densely punctate. 
Hairs yellow, fine, uneven, rather abundant and rather 
short, erect or suberect on the body; the appendages covered 
with abundant, fine, rather appressed hairs with fewer, interspersed, 
long, erect hairs. 
Deep castaneous brown; mandibles, scapes, tip of gaster 
and legs, excluding the coxae, yellowish brown; apical borders 
of mandibles and median carina of head black. 
Described from two specimens taken by Mr. A. M. Lea in 
the National Park, near Sydney, New South Wales. 
This very distinct species is interesting because, unlike the 
other known Australasian species of the genus, it approaches 
the Neotropical mucronata in the armature of the petiole. 
Acanthoponera {Anacanthoponera) hrouni Forel 
Acanthoponera hrownii Forel, Mitteil. Schweiz. Ent. Zeitschr. 8, 
1892, p. 330 y ; Emery, Gen. Insect. Ponerinae 1911, p. 36 ^ . 
Acanthoponera hrounii Forel, Trans. New Zealand Inst. 37, 1904, 
p. 353 S . 
