Clark — Australian Formicidac. 
47 
longer than tlie reniaiiider of the funieulus. Tliorax fully 
as long as broad' at the pronotura; one and one half times broader 
through the prouotum than through the e])iuotum; proiiotum cou.- 
vex in front and on the sides, feebly coiieave in the niesonotal 
region; there are no traces of niesonotal sutures; the posterior 
margin of the epinotum slightly concave and marginate, tlie 
angles bluntly produced; in profile rounded and convex above, 
the epinotal declivity abrupt, almost at a right angle with the 
dorsum, the sides marginate. Node, from above, two and om- 
half times broader than long, all four sides of the dorsum convex; 
in profile it is twice as high as long, rounded above, the anterior 
face almost straight, the ventral surface in front with a short 
blunt tooth-like projection, to the front edge of which is attached 
a keel-like, translucent lamella. Postpotiole slightly broader than 
long, miuh broader behind than in front, the anterior border and 
sides rounded; in ])rofile it is convex and rounded above, the 
ventral surface with a transverse, tooth-like ])rocess in front- 
A strong constriction between the two segments of the gaster. 
The second segment is one fourth broader than long, broader in 
front than behind, .strongly^ rounded and convex, /narrowing 
rapidly to the small apical segments which are ])laced below. Legs 
short and stout, 
SaJ).: Western Australia, Manjimiip (J. Clark). 
Two exam})les under a rotten log. 
The occurrence if this insect in South West Australia is (-f 
great interest, as it shows the wide distribution of this aiuient 
genus. This species appeal’s to be intermediate between 
]). cJavicornis. Emery, from 'New Guinea, and 1). aiitarctica . Emery, 
from Now Ziuiland. 
Acanthoponera occidentalis (FI. VI. 3). 
Worker: Lengtli ,8.5 — 4mm. 
Head, thorax and node castaneous, abdomen with a yellow 
tinge; mandibles, antennae and legs testaceous. Hairs yellow, 
long, slender and erect, abundant on the apical segments of the 
gaster, longer and more bristle-like on the clypeus. Pubescence 
yellow, long and ad])ressed on the gaster, shorter and more 
abundant on the antennae and legs. 
Head and tlioi-ax opa<iue, gaster shining. Hoad finely and 
longitudinally , rugose on the middle, finer and more punctate on the 
frontal areas and on the sides. Mandibles shining, with largo, 
scattered, piligerous punctures. Thorax densely and coarsely 
punctate, becoming almost rugose on the epinotum. Node coarsely 
punctate. Gaster densely covered Avitli wide, shallow punctures. 
