AUSTRALIAN FORMICIDAE 
77 
epinotum twice as broad as long, sides convex, posterior border straight, 
sharply margined ; in profile convex longitudinally, without traces of sutures, 
pronotum rounded downward in front, epinotal declivity at an obtuse angle, 
slightly longer than dorsum of epinotum from which it is divided by a sharp 
ridge. Node as broad as long, slightly broader behind than in front, dorsum 
and sides convex, sharply margined, anterior border concave, not margined, 
posterior border straight not margined, the angles produced backward as 
broad flat spines, bluntly pointed, as long as broad at base, the inner edge 
straight, the outer edge curved inward ; in profile one-fourth longer than high, 
dome-shaped, anterior face convex, sharply margined by a continuation of 
the dorsal edge, sharp margin of dorsum feebly convex, slightly higher behind 
than in front, produced backward and upward as a long sharp spine, twice as 
long as broad at base ; a short sharp spine on ventral surface in front, directed 
backwards. Postpetiole barely one-third broader than long, broader behind 
than in front, sides convex, anterior border straight, angles broadly rounded, 
dorsum evenly convex in all directions; constriction between postpetiole and 
gaster wide but not deep. First segment of gaster one-third broader than 
long, broader behind than in front, sides strongly convex. Pygidium truncate, 
concave, margined on sides by a sharp ridge, the ridge furnished with numerous 
short sharp translucent spines. Sting long and stout. Legs long and robust. 
Male. Length 7.5-8 mm. 
Colour, sculpture and pilosity as on the worker. 
Head one-seventh broader than long, almost circular. Mandibles large, 
triangular, furnished with numerous fine small sharp teeth. Clypeus short, 
broadly rounded in front. Frontal carinae large and erect, truncate and 
confluent behind. Eyes placed at middle, occupying one-third of sides. Ocelli 
large and prominent. Scapes extend backward almost level with posterior 
margin of eyes ; all funicular segments longer than broad. Thorax barely twice 
as long as broad. Pronotum short, hemispherical, a short broad tubercle-like 
projection on top at pro-mesonotal suture. Mesonotum one-sixth longer than 
broad, bluntly rounded in front. Mayrian and parapsidal furrows feebly 
impressed. Scutellum one-third broader than long, oval. Epinotum twice as 
broad as long, convex both ways, posterior border sharply margined; in 
profile vertical, high, convex, sharp pointed and projecting in front above. 
Mesonotum evenly convex from apex to base. Scutellum dome-shaped, twice 
as long as high. Epinotum convex longitudinally, one-third longer than 
declivity. Declivity at an obtuse angle, straight, boundary between declivity 
and dorsum marked by a strong ridge. Node one-fourth broader than long, 
very slightly broader behind than in front, anterior border straight sharply 
margined, angles sharp, sides and posterior border convex, sides submarginate 
in front to middle; in profile as high as long, dome-shaped, a broad blunt 
tooth-like projection directed backward in front below. Postpetiole barely 
one-third broader than long, sides and front strongly convex; constriction 
between postpetiole and gaster wide but not deep. First segment of gaster 
almost one-third broader than long, much broader behind than in front, sides 
strongly convex. Genitalia retracted. Legs long and slender. 
Habitat. — Victoria: Patho (H. A. Potter). 
Neophyracaces gwynethae sp. nov. 
Plate XIII, Figs. 6, 7. 
Worker. Length 8 - 5 mm. 
Bright ferruginous. Eyes, ocelli, margins of thorax, node and postpetiole 
dark brown. 
