AUSTRALIAN SPECIES OF RHYTIDOPONERA MAYR 
79 
notum and epinotum strongly convex transversely. In profile evenly convex 
longitudinally, pro-mesonotal suture weakly impressed, meso-epinotal suture 
feebly indicated. Node barely twice as broad as long, oval. In profile top 
portion as long as broad, anterior and posterior faces straight, parallel, 
dorsum straight, one-sixth shorter than posterior face. Ventral spine very 
short, thorn-like. Postpetiole barely one-third bi'oader than long, broadly 
cone-shaped in front. First segment of gaster one-fifth broader than long, 
strongly convex behind. Constriction between the two segments broad and 
shallow. Legs slender. 
M ale. — Unknown. 
Habitat. — Northern Territory. Tennants Creek; Powell’s Creek; New- 
castle Waters (C. Barrett, 1933). 
Near JR. hilli Crawley but readily separated by the slightly 
squarer head, more convex thorax, thicker node and the 
sculpture. 
Bhytidoponera fuliginosa sp. nov. 
(PI. VI, fig. 57.) 
Worker. — Length, 7 mm. 
Blackish-brown, funiculi and ga,ster brown. 
Mandibles, scapes and tibiae very finely and densely striate longitudinally. 
Head coarsely punctate-rugose, the punctures large, elongated, deep and 
shining at bottom, almost longitudinally rugose on cheeks, some very fine 
longitudinal striae between frontal carinae. Thorax coarsely punctate- 
rugose, the punctures very large, shallow and shining at bottom. Pronotum 
striate-reticulate transversely on anterior third, the punctures smaller and 
shallower than those behind. Posterior half of mesonotum and \yhole ot 
epinotum transversely rugose, very coarsely on declivity. Node circularly 
striate-rugose with large scattered punctures, anterior face finely striate 
transversely. Postpetiole very delicately and densely striate, circularly, or 
rather following the contour of segment. First segment of gaster more 
finely striate longitudinally. Femora finely reticulate, with some large pili- 
^ Hair^ yellow, long and erect on front of clypeus and apical segments of 
gaster, shorter and less abundant on rest of body. Suberect on antennae and 
lees. Funiculi pubescent. • i i i 
Head one-sixth longer than broad, sides strongly convex, occipital border 
with a slight concave depression in the middle, angles broadly rounded, a sharp 
crest follows the contour of border in front. Mandibles with numerous small 
sharp teeth. Clypeus broadly convex above and m front. Frontal area deep 
in front, shallow behind. Frontal carinae as long as broad m front. Scapes 
extend beyond occipital border by one-third their length First and third 
segments of funiculus equal in length, one-fifth shorter than second, apical 
as long as the two preceding together. Eyes placed just m front of postenor 
third of sides. Thorax fully twice as long as broad, pro-mesonotal suture 
sharply impressed. Pronotum one-fourth broader than long, sides and dorsum 
convex Mesonotum and epinotum strongly convex transversely. In profile 
strongly convex longitudinally, with a distinct impression at sutures. Pro- 
Ltum strongly convex and dropping in front. Mesonotum evenly convex. 
