NEW AUSTRALIAN ANTS. 
half as long as head, terminal border furnished with seven large sharp teeth 
with a small one between them. Clypeus projecting and broadly convex in 
front. Frontal area small, triangular. Frontal carinae broad and flat, short, 
one and a half times broader than long, a feeble groove between them, extending 
to the anterior ocellus. Scapes extending beyond occipital border by almost 
twice their thickness ; first segment of funiculus twice as long as broad, barely 
as long as the two following together, second to ninth slightly longer than 
broad, tenth as long as broad, apical twice as long as broad, as long as the two 
preceding together. Eyes very large and convex, in front of middle of sides. 
Ocelli small but prominent. Thorax full}'' twice as long as broad, strongly 
constricted at the mesonotum. Pronotum one-fifth broader than long, strongly 
convex in all directions. Mesonotum one and a half times broader than long. 
A deep and wide constriction between mesonotum and epinotum, the spiracles 
prominent at the sides on top. Epinotum one-fourth broader than long, 
strongly convex in all directions. In profile the pronotum and mesonotum 
forming a single convexity, the suture feebly indicated. Mesonotum much 
lower, flat on top, rounded into declivity, the latter oblique, almost as long as 
dorsum. Node twice as broad as long, oval ; in profile as long as high, cone- 
shaped ; a faint indication of a tooth on the ventral surface in front. Gaster 
one and a half times longer than broad. Legs long and slender. 
Worker minor. — Length, 4.5 mm. 
Colour, sculpture and pilosity as in the major. 
Head one-fourth longer than broad, sides and occipital border strongly 
convex, broader behind than in front. Mandibles fully one-third as long as 
head, furnished with seven large teeth as in the major worker. Clypeus feebly 
carinate on the basal two-thirds. Frontal carinae slightly more raised at 
sides. Antennae similar. Eyes and ocelli smaller, the ocelli very small, 
hardly perceptible. Thorax somewhat similar but epinotum shorter and more 
convex. Node more slender and sharper above. 
Female. — Length, 7.5 mm. 
Colour, sculpture and pilosity as in worker major from which it differs as 
follows : Head almost parallel ; occipital border feebly convex, angles rounded. 
Teeth on mandibles longer and stronger. Clypeus subcarinate on basal half. 
Eyes and ocelli larger. Pronotum short and convex. Mesonotum large, flat ; 
parapsidal furrows deeply impressed. Scutellum highly polished. Epinotum 
very short and broad, declivity flat. Node similar. Gaster larger. Legs 
slender. Wings hyaline. Discoidal cell small. 
Male.- — Length, 6 mm. 
Colour, sculpture and pilosity as in the worker. 
Head one-sixth longer than broad, much broader behind than in front, 
sides and occipital border strongly convex. Mandibles fully half as long as 
head, somewhat sickle-shaped, inner and terminal borders concave, edentate. 
Clypeus produced, broadly convex in front. Frontal area large. Scapes 
slender, extending beyond occipital border by one-fifth their length ; first 
segment of funiculus fully twice as long as broad, second to eleventh about 
one and three-quarter times longer than broad, apical two and a third times 
longer than broad. Eyes large, convex, placed in front of the middle of sides. 
Ocelli large and convex. Thorax twice as long as broad. Pronotum fully 
twice as broad as long, parapsidal furrows, ' and a short median furrow in 
front, deeply impressed, truncate and convex in front, tegulae yellow, projecting 
at sides. Scutellum one and one-half times broader than long, strongly convex 
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