72 
AUSTRALIAN SPECIES OF RHVTIDOPONERA MAYR 
Head slightly longer than broad, sides slightly convex to eyes, occipital 
border broadly convex to posterior edge of eyes. Mandibles with numerous 
very small teeth. Clypeus broadly convex above, convex and bluntly pointed 
in front. Frontal carinae as long as broad in front. Frontal area triangular, 
large and deep. Scapes extend beyond occipital border by fully one-third 
their length. First three segments of funiculus equal in length, apical as long 
as the two preceding together. Eyes placed at anterior third of sides. Thorax 
fully twice as long as broad, pro-mesonotal suture sharply impressed. Pro- 
notum as long as broad, sides almost straight, dorsum feebly convex trans- 
versely, posterior corners prominent, but not projecting. Mesonotum one- 
third broader than long, strongly convex in all directions, the anterior border 
bluntly pointed. Epinotum strongly convex. In profile convex longitudinally 
with a distinct break at the pro-mesonotal suture. Pronotum dropping 
rather abruptly in front, strongly convex but slightly flattened in the middle. 
Mesonotum convex, higher than epinotum, the latter convex from base to 
apex. Node almost twice as broad as long, oval, bluntly pointed in front, 
a deep longitudinal groove in the middle. In profile almost twice as high 
as long, the anterior face straight, vertical but concave at base, posterior 
face short and straight, rounded into dorsum, the latter flat, sloping down- 
ward and backward, anterior edge rounded; the ventral spine very short 
and sharp. Postpetiole almost one-third broader than long, strongly convex 
in front, a faint longitudinal impression on top behind. First segment of 
gaster one-fourth broader than long, strongly convex behind, the constriction 
between the two segments strong but not deep. Legs robust. 
Male unknown. 
Habitat. — Western Australia: Ludlow (type locality) (J. Clark). 
Eedescribed from a co-type, and a series from the type 
colony. The original locality given by Crawley as Manjimiip 
is an error, probably owing to misplaced labels. 
Ilhytidoponera incisa Crawley. 
(PL VI, tig. 50.) 
Rhytidoponera (Rhytidoponcra) incisa Crawley, Ann. Mag. Nat. Hist., 
8, XV, p. 132, 1915, 5 . 
Worker. — Length, 10-11 mm. 
Black. Mandibles, scapes, legs and gaster brown, funiculi and tarsi 
reddish-brown. 
Mandibles, scapes and tarsi very finely and densely striate longitudinally. 
Head, thorax and node very finely and densely reticulate with large, shallow 
punctures sparsely scattered throughout, feebly striate between frontal carinae 
diverging outward to occipital angles, clypeus more rugose with a distinct 
central carina. Gaster much more densely and finely reticulate. 
Hair yellow, long and erect on front of clypeus and apical segments of 
gaster, very short, erect and sparse on antennae, body and legs. 
Head slightly longer than broad, very slightly broader in front than 
behind, sides convex, occipital border with a moderately deep concave depres- 
sion in middle, angles bluntly rounded. Crest obsolete except on angles. 
Mandibles with numerous small sharp teeth. Clypeus rather flatly convex 
above with a faint longitudinal median carina, anterior border strongly con- 
