60 
AUSTRALIAN SPECIES OF RHYTIDOPONERA MAYR 
convex, sloping downward behind, declivity face one-third shorter than 
dorsum. Node convex above and on sides, almost circular. In profile convex 
above, sloping downward gradually in front. Ventral spine thick, sharp 
pointed, twice as long as broad at base. Postpetiole one-third broader than 
long, sides strongly convex. First segment of gaster one-third broader than 
long, broader behind than in front, sides convex. Strongly constricted 
between the two segments. Genitalia retracted. Legs long and slender. 
Habitat. — Western Australia: Perth; Mundaring; Armadale (J. Clark). 
This species, widely distributed in the Perth district, has 
been mistaken for i?. punctata Sm. which it closely resembles. 
It. punctata has been found only in South Australia and 
differs in many ways. 
Ithytidoponera flindersi sp. nov. 
(PI. V, tig. 37.) 
Worker. — Length, 10 mm. 
Chocolate-brown. Mandibles, funiculi and legs reddish. 
Mandibles, scapes and tibiae very delicately and densely striate longi- 
tudinally. Head, thorax and node finely and densely reticulate, with large, 
shallow, very scattered punctures, most of the punctures more or less obsolete. 
Pronotum very sparsely punctate, the punctures large and shallow. Punctures 
a little more numerous on mesonotum, on cpinotum the punctures are slightly 
larger and similarly scattered. Node with a few obsolete large punctures on 
the edges. Gaster very finely and densely reticulate-punctate. Femora very 
delicately reticulate. 
Hair yellow, very sparse, apparent only on front of clypeus and apex of 
gaster. 
Head one-sixth longer than broad, sides feebly convex, occipital border 
straight, angles broadly rounded. Mandibles very feebly and irregularly 
denticulate. Clypeus strongly convex above and in front. Frontal area 
triangular, deep. Frontal carinae as long as broad. Scapes extend beyond 
occipital border by fully one-third their length. First and third segments of 
funiculus equal in length, one-seventh shorter than second, apical one-tenth 
shorter than the two preceding together. Eyes placed at posterior third of 
sides. Thorax fully twice as long as broad, sutures strongly impressed. 
Pronotum barely one-fourth broader than long, sides straight, dorsum convex 
transversely. Mesonotum one-third broader than long, strongly convex 
behind and on sides, weakly convex and bluntly pointed in front, dorsum 
strongly convex both ways. Epinotum strongly convex transversely. In 
profile sutures deeply impressed. Pronotum strongly convex, flattened in 
the middle and sloping downward in front. Mesonotum strongly convex. 
Epinotum much lower than mesonotum, dorsum and declivity straight, angle 
rounded, declivity barely one-third longer than dorsum. Node as long as 
broad, almost circular, dorsum flat. In profile top portion one-fifth longer 
than high, anterior and posterior faces straight, parallel, dorsum straight, 
posterior edge rounded. Ventral spine short, thorn-like. Postpetiole one- 
third broader than long, strongly convex in front. First segment of gaster 
one-seventh broader than long, strongly convex on sides and behind. Con- 
striction sharp and deep. Legs robust. 
Male. — Unknown. 
