82 AUSTRALIAN SPECIES OF RHYTIDOPONERA MAYR 
straight, one-sixth shorter than posterior face. Ventral spine thorn-like, 
short and broad, sharp pointed. Postpetiole one-fourth broader than long, 
strongly convex in front. First segment of gaster one-fifth broader than long, 
strongly convex behind. Constriction deep and wide. Legs long and rather 
slender. 
Male. — Unknown. 
Habitat. — South Australia: Mt. Serle (Hale and Tindale) ; Owieandana 
(Hale and Tindale). 
Type in South Australian Museum. 
Four examples. 
Rhytidoponera JiiJli Crawley. 
(PI. VI, fig. 60 .) 
Rhytidoponera (Rhytidoponcra) hilli Crawley, Ann. Mag. Nat. Hist., 8, 
XV, 1915 , p. 131 , ^ . 
Worker. — Length, 8 mm. 
Head and thorax blackish-brown. Mandibles, funiculi, legs and gaster 
brown or reddish-brown. 
Mandibles, scapes and tarsi very finely and densely striate longitudinally. 
Clypeus coarsely punctate-rugose longitudinally. Head very finely and 
densely reticulate, with numerous large shallow scattered punctures, rather 
widely spaced, some fine longitudinal striae between frontal carinae diverging 
outward behind. Thorax very finely striate-reticulate. On the pronotum the 
striae transverse in front, circular behind, transverse on mesonotum and 
epinotum, much coarser on declivity, the whole thorax with large shallow 
punctures, more sparse and scattered than on head. Node very finely striate 
transversely on top and in front, with a few small shallow punctures. Post- 
petiole very finely and densely striate, transversely arched. First segment 
of gaster transversely striate, both segments with numerous fine piligerous 
punctures. Femora finely reticulate, with numerous small piligerous punctures. 
Hair yellow, long and erect on front of clypeus and apex of gaster, very 
short and adpressed elsewhere. 
Head one-sixth longer than broad, sides and occipital border slightly con- 
vex, angles broadly rounded, a slight concave depression on middle of occipi- 
tal border and a feeble crest in front. Mandibles with numerous fine denticles. 
Clypeus strongly convex above and in front. Frontal area triangular, deep. 
Frontal carinae longer than broad in front. Scapes extend beyond occipital 
border by fully one-third of their length. Second and third segments of 
funiculus equal in length, one-sixth longer than first, apical barely as long as 
the two preceding together. Eyes placed just in front of anterior third of 
sides. Thorax twice as long as broad, pro-mesonotal suture sharply impressed, 
meso-epinotal suture feebly impressed. Pronotum broader than long, sides 
and dorsum convex. Mesonotum one-third broader than long, strongly con- 
vex behind and on sides, more weakly convex in front, strongly convex all 
ways on top. Epinotum strongly convex transversely. In profile pro- 
mesonotal suture sharply excised, epinotum abruptly dropped at suture. Pro- 
notum convex. Mesonotum flat or straight abruptly truncate behind, 
higher than epinotum. Epinotum sloping downward behind, convex on 
anterior half, straight^ behind, declivity short and straight. Node thin, twice 
as broad as long, straight in front and behind, sides and dorsum convex. In 
profile almost one-third higher than long, anterior face straight and vertical. 
