78 
AUSTRALIAN SPECIES OF RHYTIDOPONERA MAYR 
their length. First segment of funiculus one-sixth longer than second, third 
to fifth slightly longer than first, apical barely as long as the two preceding 
together. Eyes convex, placed behind the middle of sides. Thorax fully 
twice as long as broad, sutures sharply impressed. Pronotum one-third 
broader than long, sides parallel, feebly concave in middle, dorsum feebly 
convex. Mesonotum circular, as broad as long, strongly convex. Epinotum 
convex transversely. In profile convex longitudinally with a distinct depres- 
sion at meso-epinotal suture. Pronotum convex, dropping abruptly in front. 
Mesonotum convex, dropping behind. Epinotum straight on anterior third 
then dropping suddenly behind, straight, declivity shorter than dorsum, at an 
obtuse angle. Node one-third broader than long, oval. In profile higher 
than long, narrower at top than at bottom, somewhat cone-shaped, dorsum 
feebly convex, the ventral spine thorn-like, slender and sharp. Postpetiole 
one-fourth broader than long, strongly convex in front. Eirst segment of 
gaster one-fourth broader than long, sides feebly convex; the constriction 
between the two segments deep and wide. Legs very long and slender. 
Male. — Unknown. 
Habitat. — Northern Territory: Koolpinyah (type locality) (G. F. Hill, 
1915; C. Barrett, 1933). 
RJiytidoponera eremita sp. nov. 
(PL VI, fig. 56.) 
Worker. — Length, 8 mm. 
Head, thorax and node blackish-brown, gaster black. Mandibles, scapes 
and legs brown, funiculi reddish. 
Mandibles, scapes and tibiae very finely and densely striate longitudinally. 
Clypeus irregularly rugose, with a distinct sharp longitudinal carina in the 
middle. Head striate-rugose, longitudinal between frontal carinae, diverging 
outward behind, with large, shallow, widely-spaced punctures between the 
striae, interstices very finely reticulate. Pronotum circularly striate-rugose, 
almost transversely striate in front, with a few very large, shallow, scattered 
punctures, interstices densely reticulate. Mesonotum irregularly rugose with 
a few shallow, very scattered punctures. Epinotum transversely rugose, much 
coarser behind, with very few more or less obsolete punctures. Node circu- 
larly striate-rugose, with many small punctures, anterior and posterior faces 
finely striate transversely. Gaster very densely and delicately striate, trans- 
versely arched on postpetiole, transverse on following segment, with numerous 
very fine punctures. Femora very finely reticulate and punctate. 
Hair yellowish-red, long and erect on front of clypeus and apex of gaster, 
very short and sparse on body, very fine and adpressed on scapes, gaster 
and legs. 
Head one-sixth longer than broad, sides feebly conve.x, occipital border 
convex, strongly indented at the middle, a sharp small crest in front, angles 
rounded. Mandibles finely and irregularly denticulate. Clypeus strongly 
convex above and in front. Frontal area triangular, small and shallow. 
Frontal carinae as long as broad in front. Scapes extend beyond occipital 
border by one-third their length. Second segment of funiculus very slightly 
longer than third, first slightly shorter than third, apical as long as the two 
preceding together. Eyes large and convex, placed at posterior third of sides. 
Thorax barely twice as long as broad. Pro-mesonotal suture sharply defined. 
Pronotum slightly broader than long, sides and dorsum feebly convex. Meso- 
