76 
AUSTRALIAN SPECIES OF RHYTIDOPONERA MAYR 
punctate-rugose, transversely rugose on declivity and anterior face of node. 
Postpetiole circularly and finely striate, first segment of gaster more finely 
striate longitudinally. 
Hair yellow, sparse, very short and erect throughout, longest on clypeus. 
Head one-seventh longer than broad, almost as broad behind as in front, 
sides convex, occipital border slightly concave in middle, angles rounded. 
Crest feeble. Mandibles without teeth, edges sharp. Clypeus rather short, 
convex above and in front. Frontal carinae not as long as broad in front, 
twice as broad in front as behind. Frontal area triangular with a large shallow 
puncture in middle. Scapes extend beyond occipital border by fully one 
third their length. First to fourth segments of funiculus equal in length, all 
twice as long as broad, apical as long as two preceding together. Eyes almost 
at posterior third of sides. Thorax one-third longer than broad. Pronotum 
one-third broader than long, sides and front convex, dorsum flattened. Meso- 
notum oval, broader than long, convex in all directions. Epinotum very 
short. In profile convex longitudinally, pro-mesonotal suture sharply defined, 
meso-epinotal suture indicated by a slight depression. Pronotum strongly 
convex, dropping in front. Mesonotum flatly convex, dorsum of epinotum 
very short and straight, rounded into declivity, the latter fully twice as long 
as dorsum. Node oval, one-third broader than long. In profile twice as high 
as long, anterior and posterior faces parallel, dorsum flat, borders convex, 
the ventral spine very sharp, thorn-like, three times as long as broad at base. 
Postpetiole one-fifth broader than long, strongly convex in front, sides feebly 
convex. Constriction between postpetiole and first segment of gaster deep 
and wide. First segment of gaster one-fifth broader than long, strongly 
convex behind. Legs long and slender. 
Male. — Unknown. 
Habitat. — North Western Australia: Derby (J. Campbell). 
Tlie examples from Derby are smaller than those described 
by Forel but no other differences are to be seen. Forel 
recorded the male of this species from Derby but did not 
describe it. 
RJiytidoponera reflexa sp. nov. 
(PI. VI, fig. 54.) 
Worker. — Length, 7 mm. 
Dark chocolate-brown, funiculi, gaster and legs reddish-brown. 
Mandibles and scapes very finely and densely striate longitudinally. Clypeus 
longitudinally rugose. Head coarsely punctate-rugose, almost longitudinally 
rugose between frontal carinae, the punctures deep and shining at bottom. 
Thorax and node coarsely punctate-rugose similar to head, a few fine trans- 
verse rugae on anterior fourth of pronotum and coarse transverse rugae on 
epinotal declivity, anterior face of node transversely striate. Both segments 
of gaster delicately striate, transversely arched, with some very small scattered 
punctures. Legs finely reticulate, longitudinally on the tibiae, coarser and 
more transverse on coxae. 
Hair yellow, short and erect, moderately abundant throughout. 
Head very slightly longer than broad, almost circular. Mandibles with 
numerous very small sharp teeth. Frontal area large, deep in front, shallow 
