AUSTRALIAN SPECIES OF RHYTIDOPONERA MAYR 
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punctures poorly defined on head, wide and shallow on 
thorax. Epinotum and declivity transversely rugose. Node very finely 
and densely reticulate, with three or four transverse rugae on the middle. 
Gaster shining. Postpetiole finely and densely reticulate. First segment of 
gaster smooth, the fine reticulation almost obsolete. Legs very finely 
reticulate. 
Hair reddish, erect, long and abundant on body, suberect and shorter 
on antennae and legs. 
Head as long as broad, much broader behind than in front, occipital border 
short and straight, sides strongly convex. Mandibles strongly dentate. 
Clypeus strongly produced and convex in front, convex above with a slight 
depression in front. Frontal carinae as long as broad in front, much broader 
behind, not covering the antennal insertions in front. Scapes extend to 
anterior edge of posterior ocelli. Second segment of funiculus fully one-third 
longer than first, apical pointed, one-fourth longer than preceding. Eyes 
large and convex, placed at middle of sides, and ocupying half of the sides. 
Ocelli large and projecting. Thorax barely twice as long as broad. Pronotum 
hardly seen from above. Mesonotum one-fourth broader than long, broadly 
cone-shaped in front, mayrian furrows very feebly indicated, parapsidal 
furrows sharply impressed; a deep and wide excision between scutellum 
and mesonotum. Scutellum one-third broader than long, anterior edge 
straight, sides and posterior edge convex, a strong longitudinal groove in the 
middle above. Mesonotum erect, broadly triangular. Epinotum strongly 
convex transversely. In profile pronotum erect, vertical, feebly convex. 
Mesonotum erect in front, strongly and evenly convex from base to apex. 
Suture between pro-mesonotum sharply but not deeply impressed. Scutellum 
slightly longer than high, dome-shaped. Metanotum erect, bluntly pointed, 
as high as long at base. Epinotum strongly convex from base to foot of 
declivity. Node scarcely defined, very slightly wider than stalk in front, 
sides convex. In profile one-fourth higher than stalk in front, broadly convex, 
the ventral spine fully three times as long as broad at base, very slender and 
sharp. Postpetiole one-third broader than long, cone-shaped. First segment 
of gaster one-third broader than long, much broader behind than in front, 
sides convex. Genitalia retracted. Legs long and slender. 
Habitat. — South Australia: Mt. Lofty (A. H. Elston). Neiv South Wales: 
Broken Hill (F. Shepherd). 
Bhytidoponera stridulator sp. nov. 
(Text fig. 1.) 
Worker. — Length, 11 mm. 
Black. Mandibles, antennae and legs blackish-brown. 
Mandibles and scapes very finely striate longitudinally. Clypeus coarsely 
rugose, the rugae longitudinal. Head coarsely rugose, the rugae diverging 
outward behind, very finely and densely reticulate between rugae. Thorax 
and node coarsely and irregularly rugose, somewhat transverse on front of 
pronotum and the epinotum. Postpetiole and first segment of gaster strongly 
arched transversely striate, almost longitudinal in middle, striae strongest 
on postpetiole. Legs densely reticulate. 
Hair yellow, short, erect and abundant throughout, longer on front of 
clypeus and apical segments of gaster. 
Head one-sixth longer than broad, broadest in front, occipital border 
