42 
AUSTRALIAN SPECIES OF RHYTIDOPONERA MAYR 
irregularly and rather coarsely rugose, somewhat longitudinal between the 
frontal carinae diverging outward behind, more transverse near border, inter- 
stices densely and finely reticulate, with wide, very shallow, obsolete punctures 
scattered sparsely between the rugae. Thorax very finely and densely reticu- 
late. Pronotum coarsely rugose transversely but irregularly. Mesonotum 
and epinotum coarsely punctate-rugose, the rugae transverse at epinotal 
declivity. Node coarsely punctate- rugose, groove in middle not punctate. 
Gaster very finely striate, transversely arched, with numerous small punctures. 
Femora reticulate with fine small punctures. 
Hair yellow, long and erect, but sparse on front of clypeus and apex of 
gaster, shorter and abundant on rest of body, suberect on antennae and legs. 
Head one-fifth longer than broad, sides feebly convex, occipital border 
concave in middle, angles sharply rounded, slightly projecting in front, the 
projection formed by a sharp crest on angles only. Mandibles very feebly 
denticulate. Clypeus broadly convex in front and above. Frontal area deep 
in front, shallow behind. Frontal ridges as long as broad in front. Scapes 
extend beyond occipital border by fully one-third their length. Second seg- 
ment of funiculus one-fourth longer than first and one-fifth longer than third, 
apical barely as long as the two preceding together. Eyes placed in front of 
posterior third of sides. Thorax two and one-half times longer than broad, 
pro-mesonotal suture weakly defined. Pronotum one-fifth broader than long, 
sides feebly depressed, dorsum feebly convex transversely. In profile sutures 
feebly defined. Pronotum feebly convex in front and behind, rather flat in 
middle. Mesonotum and epinotum almost straight, feebly depressed, or 
concave, near junction, declivity at an obtuse angle, straight below, rounded 
into dorsum. Node barely one-third broader than long, posterior face 
straight, front and sides strongly convex, dorsum convex both ways, with 
a deep and rather wide longitudinal groove. In profile showing a distinct 
stalk in front, the top portion twice as long as high behind, dome-shaped, all 
faces convex. The ventral spine, stout and sharp, barely twice as long as 
broad at base. Postpetiole fully one-fourth broader than long, sides and 
front broadly convex. First segment of gaster barely one-fourth broader 
than long, strongly convex behind. Legs robust. 
Male. — Unknown 
Habitat. — South Australia: Lake Killalpaninna (Prof. T. W Grea-orv 
1903). 
Described from four specimens. 
Rhytidoponera spoliata Emery. 
(PI. IV, fig. 19.) 
Ectatomma (Rhytidoponera) spoliatum Emery, Ann. Soc. Ent. Belg., 
xxxix, p. 348, 1895, . 
Rhytidoponera (Rhytidoponera) spoliata Emery, Gen. Ins., fasc. 118, 
p. 38, 1911, t?. 
Worker. — Length, 12.5 mm. 
Black, mandibles, funiculi and legs brown. 
Mandibles and scapes very finely and densely striate longitudinally and 
very finely punctate. Legs and coxae finely reticulate. Clypeus longitudinally 
striate-rugose, coarser at middle than at sides. Head rather coarsely striate- 
