NEW AUSTRALIAN ANTS. 
broad, as broad behind as in front ; anterior angles bluntly rounded. Sides 
of mesonotum constricted, submarginate, the sutures very feebly indicated. 
Sides of epinotum convex and strongly marginate, ending in a sharp tooth-like 
angle, posterior not marginate. In profile thorax convex longitudinally, 
declivity short and flat, marginate on sides. Node one-third broader than 
long, almost one and one-half times broader in front than behind, anterior 
border concave, submarginate, sides feebly convex, anterior angles rounded, 
posterior border strongly concave, the angles produced as sharp teeth directed 
upward ; in profile as high as long, dorsum flat, anterior face at a right angle ; 
a broad blunt tooth in front below. Postpetiole one-fifth broader than long, 
parallel, anterior border and sides marginate and straight, angles rounded. 
First segment of gaster almost one-third broader than long, broadest behind. 
Legs short and robust. 
Habitat . — Victoria : Western District. 
The colour of this species is almost identical with that of 
P. rotula For el. 
Phyracaces princeps, sp. nov. 
(PI. II, fig. 4.) 
Worker. — Length, 9-10 mm. 
Bright ferruginous ; eyes, ocelli, margins of thorax, node and postpetiole 
black. 
Smooth and shining. Microscopically reticulate throughout. 
Hair reddish, erect, long and abundant. Pubescence not apparent. 
Head as broad as long, occipital border short and straight, sides strongly 
convex, as broad in front as behind. Mandibles with a sharp cutting edge, 
edentate. Clypeus short and abrupt, broadly rounded. Frontal carinae erect, 
truncate and converging behind. Scapes gradually thickened to their apex, 
extending backward to about middle of eyes ; first segment of funiculus one- 
fifth shorter than second, as long as broad, second longer than broad, third to 
tenth broader than long, apical as long as the two preceding together. Frontal 
carinae extending to anterior border of eyes. Eyes large and convex, situated 
at middle of sides. Ocelli large and prominent. Thorax barely twice as long 
as broad, sutures very feeble. Pronotum almost twice as long as broad, 
strongly convex and margined on the sides. Mesonotum greatly constricted 
laterally, one-fifth broader than long, sides not margined. Epinotum slightly 
broader than pronotum, strongly margined on sides and posterior border, the 
latter straight. In profile convex longitudinally, declivity short, almost 
straight, sides margined. Node one-fourth broader than long, broader behind 
than in front, broadest at middle, strongly margined on sides, terminated 
behind by a long, moderately broad process, directed outward and curved 
inward ; in profile longer than high, the anterior face short and vertical, sides 
margined, dorsum convex, the angles behind almost horizontal, no tooth-like 
process below on ventral surface. Postpetiole almost one-fourth broader than 
long, broadest behind, sides convex, margined on the anterior third, anterior 
border straight, margined, the angles bluntly produced laterally. A deep and 
wide constriction between postpetiole and first segment of gaster, the latter 
almost one-third broader than long and one-fourth broader behind than in 
front. Pygidium feebly concave, submarginate. Legs robust, posterior coxae 
with a rather pointed, translucent laminae on top behind. 
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