AUSTRALIAN SPECIES OF RHYTIDOPONERA MAYR 
83 
posterior face straight inclined forward, top straight, one-third shorter than 
posterior face. The ventral spine very short and sharp, not as long as broad 
at base. Postpetiole fully one-fourth broader than long, cone-shaped, sides 
strongly convex. First segment of gaster fully one-fourth broader than long, 
strongly convex behind. The constriction between the two segments broad 
and shallow. Legs robust. 
Male. — Unknown. 
Habitat.- 
1913). 
-Northern Territory. Stapleton (type locality) (G. F. Hill, 
Redescribed from a co-type and a large series from the type 
locality. 
Bhytidoponera rufiventris Forel. 
(PI. VI, fig. 61.) 
Rhytidoponera convexa Mayr v. rufiventris Forel, Arkiv. f. Zook, 9, 
16, p. 11 ,1915, 5 5. 
Rhytidoponera castanea Crawley, Ann. Mag. Nat. Hist., 9, xvi, p. 589, 
1925, 5. 
Worker. — Length, 8-9 mm. 
Chocolate-brown, legs lighter brown, gaster castaneus. 
Mandibles, scapes and tibiae very finely striate longitudinally. Head 
coarsely reticulate-punctate, the punctures large and deep, shining at bottom. 
Pronotum and mesonotum reticulate-punctate as on head. Epinotum punctate- 
rugose, the rugae with a transverse direction, declivity transversely striate in 
front. Postpetiole and first segment of gaster finely striate transversely with 
very fine piligerous punctures. Femora very finely and densely striate trans- 
versely, coxae reticulate-rugose transversely. 
Hair yellow, long and erect on clypeus and apical segments of gaster ; very 
short, erect but sparse on head, thorax and gaster, suberect and more abun- 
dant on antennae and legs. 
Head one-sixth longer than broad, sides feebly convex, occipital border 
straight or feebly concave in middle, angles broadly rounded, a feeble crest 
follows the contour of occiput and angles. Mandibles finely dentate. Clypeus 
broadly convex above, more sharply convex in front. Frontal area large 
and shallow. Frontal carinae very slightly longer than broad in front. Scapes 
extend beyond occipital border by fully one-third their length. First and third 
segments of funiculus equal in length, slightly shorter than second, apical 
barely as long as the two preceding together. Eyes placed just in front of 
postei’ior third of sides. Thorax twice as long as broad ; pro-mesonotal suture 
sharply defined. Pronotum slightly broader than long, sides parallel, feebly 
convex transversely. Mesonotum one-fourth broader than long, strongly 
convex in all directions. Epinotum strongly convex transversely. In profile 
convex longitudinally, with a strong depression at sutures, the pronotum 
dropping abruptly in front. Node twice as broad as long, strongly convex in 
all directions. In profile two and one-half times higher than long, narrower 
on top than below, anterior face straight, sloping forward below, posterior 
face straight sloping backward below, dorsum straight rounded into posterior 
face, anterior edge sharp; the ventral spine short, slender and sharp. Post- 
petiole fully one-fourth broader than long, strongly convex in front. First 
