AUSTRALIAN SPECIES OF RHYTIDOPONERA MAYR 
41 
Mandibles and scapes very finely striate longitudinally. Head coarsely 
punctate-rugose, the punctures large and deep, shining at bottom, interstices 
very finely striate-reticulate. Pronotum very finely and superficially striate, 
transversely arched in front, longitudinally arched behind, the basal third with 
large deep shining punctures. Mesonotum shining, transversely striate, the 
striae obsolete, numerous large shining punctures. Epinotum shining, trans- 
versely arched striae obsolete in front, stronger behind, basal half without 
punctures, apical half with obsolete punctures. Gaster smooth and shining 
with sparse small obsolete punctures. Legs shining with scattered piligerous 
punctures. 
Hair yellow, long and erect on front of clypeus and apex of gaster, very 
short, fine and adpressed on antennae and legs, none elsewhere. 
Head fully one-sixth longer than broad, broadest in front, sides feebly 
convex, occipital border strongly convex, not truncate but slightly produced 
as a short neck behind, occipital angles rounded. Mandibles feebly dentate. 
Clypeus convex above and in front. Frontal area triangular, large but not 
deep. Frontal carinae as long as broad in front, somewhat raised in front. 
Scapes extend beyond occipital border by fully one-tliird their length. Second 
segment of funiculus one-fifth longer than third, apical as long as the two 
preceding together. Eyes placed just behind the middle of sides. Thorax 
two and one-half times as long as broad, sutures sharply defined. Pronotum 
as long as broad on top beliind, sides almost parallel on top, greatly swollen 
outward below, dorsum convex transversely in front with a faint longitudinal 
impression continued to base, basal third with a deep and wide depression at 
each side of median impression, giving the shoulders a raised appearance. 
Mesonotum one-fifth broader than long, strongly convex in all directions. 
Epinotuni strongly convex transversely. In profile pronotum convex on basal 
half, straight and sloping downward in front, abruptly truncate at apex. Front 
third of mesonotum straight, posterior two-thirds straight but dropping at 
an obtuse angle and abruptly truncate, giving a very short posterior face or 
declivity. Epinotum straight, rounded into declivity, the latter straight at an 
obtuse angle as long as dorsum. Node one-third broader than long, straight 
behind, converging in front to a broad blunt point, a deep longitudinal groove 
on dorsum. In profile the anterior face high and concave, dorsum and 
posterior face united in a convexity, the ventral spine very short, thick and 
sharp. Postpetiole fully one-fourth broader than long, strongly convex in 
front. First segment of gaster one-fourth broader than long, strongly convex. 
The constriction between the segments deep and wide. Legs long and robust. 
Male. — Unknown. 
Habitat. — Queensland: Gayndah (type locality). 
Eedescribed from a specimen in the National Museum 
collection received from the Museum Godeffroy in 1888. 
Rhytidoponera petiolata sp. nov. 
(PI. IV, fig. 18.) 
Worker. — Length, 11 5 mm. 
Blackish-brown, apical segments of funiculi reddish-brown. 
Mandibles finely striate longitudinally, strongly punctate. Scapes and tibiae 
very delicately striate longitudinally. Clypeus longitudinally rugose. Head 
D 
