NEW AUSTRALIAN ANTS, 
above. Metanotum appearing as a narrow deep impression. Epinotum one 
and two-thirds broader than long. In profile pronotum short and truncate in 
front, convex, separated from mesonotum by a strong excision. Mesonotum 
truncate and convex in front, dorsum flat, slightly raised at sides behind. 
Scutellum convex, lower behind. Epinotum rounded into declivity. Node 
almost twice as broad as long, oval, with a feeble longitudinal groove above ; 
in profile one and one-half times higher than long, dome-shaped. Gaster one 
and one-half times longer than broad. Genitalia exserted, slender (fig. 15b). 
Legs long and slender. Wings hyaline ; discoidal cell small. 
Habitat. — Victoria: Cheltenham (L. B. Thorn), '$ 2 T, in dead branch 
of tree. Federal Capital Territory : Canberra (T. Greaves), § <?, in limb 
of tree. 
Mr. Greaves informs me that the examples collected by him 
were in a branch seventy feet from the ground. Two species 
collected by the late Mr. Thorn were also obtained in trees, 
but apparently at no great height as Mr. Thorn secured examples 
whilst searching for Lycaenid larvae. 
Myrmecorhynchus nifithorax, sp. nov. 
(PI. Ill, fig. 17-18.) 
Worker major. — Length, 4.5 mm. 
Head and gaster chocolate brown ; mandibles yellow, apex darker , 
antennae, thorax, node and legs ferruginous. 
Shining. Mandibles with a few scattered punctures. Clypeus finely striate 
longitudinally. Head very finely reticulate in front, superficially so behind. 
Dorsum of thorax superficially reticulate, with some shallow scattered punctures; 
sides of pronotum more strongly punctured, sides of mesonotum more coarsely 
and almost longitudinally striate-reticulate, sides of epinotum longitudinally 
striate. Node and gaster smooth. 
Hair yellow, long and slender, abundant throughout, shorter and more 
bristle-like on antennae and legs. Pubescence yellow, sparse except on 
funiculus and coxae. 
Head as long as broad, broadest just behind eyes, sides strongly convex; 
occipital border straight, angles rounded. Mandibles almost half the length 
of head, furnished with nine strong sharp teeth. Clypeus rather weakly 
convex, anterior border produced, broadly convex, almost straight at middle. 
Frontal area large, transversely triangular. Frontal carinae one-third broader 
than long, sharply margined on sides. Scapes extending beyond occipital 
border by one-lifth their length ; first segment of funiculus longer than the 
two following together, second to eighth longer than broad, ninth and tenth 
as broad as long, apical pointed, twice as long as broad. Eyes circular, convex, 
placed at- middle of sides. Ocelli small. Thorax one and three-fourths longer 
than broad. Pronotum one-fourth broader than long, strongly convex in all 
directions. Mesonotum half as broad as pronotum, as long as broad, circular. 
Meso-epinotal excision wide and deep, spiracles large, placed on top, at each 
side of dorsum. Epinotum broader than long, sides convex. In profile 
pronotum strongly convex, high in front. Mesonotum continuous with pro- 
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