AUSTRALIAN SPECIES OF RHYTIDOPONERA MAYR 
77 
behind. Frontal carinae longer than broad in front, almost parallel behind 
the lobes. Scapes extend beyond occipital border by almost one-half their 
length. Second segment of funiculus one-fifth longer than first, third very 
slightly shorter than second, apical as long as the two preceding together. 
Eyes placed behind middle of sides. Thorax fully one and one-half times 
longer than broad, pro-mesonotal suture strongly impressed. Pronotum one- 
fourth broader than long, broader in front than behind, convex. Mesonotum 
and epinotum strongly convex transversely, anterior edge of mesonotum feebly 
convex. In profile dorsum almost straight with strong impression at pro- 
mesonotal suture and weaker impression at meso-epinotal suture. Pronotum 
evenly convex on top dropping abruptly at anterior third. Mesonotum evenly 
convex. Epinotum very short above, straight, rounded into declivity, the 
latter straight, at an obtuse angle, two and one-half times longer than dorsum. 
Node as long as broad, pear-shaped with the sharp apex behind, dorsum con- 
vex. In profile one-third higher than long on top, anterior face straight and 
vertical, dorsum feebly convex, as long as anterior face, anterior edge rounded, 
posterior face prolonged backward, overhanging the posterior face by one- 
fourth its length, sharp pointed ; posterior face concave, sloping forward 
below; the ventral spine thorn-like, very short and sharp. Postpetiole one- 
fifth broader than long, cone-shaped sides straight, anterior border convex. 
First segment of gaster one-fifth broader than long, strongly convex behind. 
I.egs short and robust. 
Male. — Unknown. 
Habitat. — Northern Territory: Koolpinyah (G. F. Hill; C. L. Barrett); 
Bathurst Island (G. F. Hill). 
Described from a dozen specimens. In the shape of the 
node this species resembles R. reticulata Forel, but otherwise 
is not near any other known form. 
Rhytidoponera foreli Crawley. 
(PI. YI, fig. 55.) 
Rhytidoponera (Rhytidoponera) foreli Crawley, Ent. Record, London, 
XXX, p. 87, 1918, 5 . 
Worker. — Length, 5 5 mm. 
Head, thorax and node brown, mandibles, antennae, gaster and legs 
reddish-brown. 
Mandibles finely striate longitudinally with a few small scattered punctures. 
Scapes very finely striate longitudinally. Head, thorax and node coarsely 
punctate-rugose. Postpetiole finely transversely arched striate. First segment 
of gaster more finely transversely striate. Legs very finely reticulate and 
punctate. 
Hair yellow, short and erect, moderately abundant throughout. Pubescence 
not apparent. 
Head one-third longer than broad, broader in front than behind, sides 
convex, occipital border short and straight, the angles sharp. Mandibles 
with numerous small sharp teeth. Clypeus broadly convex above, convex 
and bluntly produced in front. Frontal area small and shallow. Frontal 
carinae erect, not covering the antennal insertions, very slightly longer than 
broad in front. Scapes extend beyond occipital border by fully one-third 
