58 
AUSTRALIAN SPECIES OF RHYTIDOPONERA MAYR 
Head slightly longer than broad, sides feebly convex, occipital border 
straight, angles strongly rounded, with a feeble crest. Mandibles with 
numerous very small sharp teeth. Clypeus strongly convex above and in 
front. Frontal carinae as long as broad in front, twice as broad in front as 
behind. Frontal area shallow. Scapes extend beyond occipital border by 
almost one-third their length. First and third segments of funiculus equal 
length, very slightly shorter than second, apical barely as long as the two 
preceding together. Eyes slightly protruding, placed at the posterior third of 
sides. Thorax fully twice as long as broad. Pronotum broader than long, 
the sides almost straight and parallel, pro-mesonotal suture strongly 
impressed. Mesonotum as long as broad, broader in front than behind, 
strongly convex above. Meso-epinotal suture well defined. Dorsum of epi- 
notum short, rounded into declivity. In profile strongly indented at sutures, 
dorsum of pronotum flat, sloping downward in front, anterior and posterior 
edges rounded and dropping abruptly. Mesonotum evenly convex. Dorsum 
and declivity of epinotum descending in an even convexity. Node one-third 
broader than long, almost oval, but broader behind than in front, a strong 
longitudinal groove on dorsum. In profile much higher than long, anterior 
and posterior faces vertical, parallel ; dorsum flat, sloping slightly downward 
behind, posterior edge rounded, anterior edge sharp, the ventral spine thorn- 
like, very sharp. Postpetiole one-fourth broader than long, first segment of 
gaster slightly broader than long, larger than postpetiole. The constriction 
between the two segments deep but not wide. Legs robust. 
Habitat. — South Australia: Port Lincoln (type locality) (F. E. Wilson, 
1928). 
This species appears to be confined to the Port Lincoln 
district. The specimens captured by Mr. Wilson have been 
compared with an example from Smith’s type material, kindly 
loaned by the authorities of the British Museum ; they agree 
in every particular. 
Rliytidoponera rufonigra sp. nov. 
(PI. V, figs. 35-36.) 
Worker. — Length, 9-9 '5 mm. 
Dark chocolate-brown, mandibles, antennae and legs reddish-brown. 
Mandibles and scapes finely and densely striate longitudinally. Clypeus 
coarsely punctate-rugose, the rugae longitudinal. Head coarsely punctate, 
the punctures large and deep, each separated from the other by about its 
width, some fine longitudinal rugae between frontal carinae, diverging outward 
behind but not extending beyond the eyes ; interstices very finely and densely 
reticulate, bottom of punctures also reticulate. Thorax, node and gaster very 
finely and densely reticulate as on head. Pronotum, mesonotum and epinotum 
with very large, shallow punctures, reticulate at bottom, just as numerous as 
on head, epinotal declivity coarsely rugose transversely. Punctures on node 
smaller than on thorax, confined to the sides and edges leaving a shallow 
groove in middle reticulate only. Gaster with numerous small, very shallow 
punctures in addition to the dense reticulation. Legs very finely and densely 
reticulate, with numerous small piligerous punctures. Coxae densely reticu- 
late, anterior coxae with some large punctures. 
