38 
AUSTRALIAN SPECIES OF RHYTIDOPONERA MAYR 
straight or feebly convex, angles sharply rounded, produced laterally and 
slightly forward, crest feeble, interrupted at middle. Mandibles with numerous 
small sharp teeth. Clypeus strongly convex above and in front. Frontal 
area large and shallow. Frontal ridges as long as broad in front, parallel 
behind. Scapes extend fully one-third their length beyond occipital border. 
Second and third segment of funiculus equal in length, each barely twice as 
long as second, apical shorter than the two preceding together. Eyes project- 
ing slightly at posterior third of sides. Thorax twice as long as broad, 
sutures well defined. Pronotum almost one-third broader than long, feebly 
convex transversely, sides strongly compressed. Mesonotum almost one- 
third broader than long, strongly convex in all directions. Epinotum one- 
fifth longer than broad, convex transversely. In profile sloping downward 
in front, convex at apex and base, straight in middle. Mesonotum strongly 
convex. Epinotum lower than mesonotum, straight, rounded into declivity, 
the latter straight, at an obtuse angle. Node one-third broader than long, 
oval. In profile longer than high and longer than the short stalk in front, 
dome shaped; the ventral spine short, thick and sharp. Postpetiole one- 
fourth broader than long, dome-shaped. Constriction between postpetiole and 
gaster sharp and deep. First segment of gaster one-fourth broader than 
long, strongly convex behind and on sides. Legs long and robust. 
Fig. 1. Rhytidoponera stridulator sp. nov. 
Male above; worker below. 
Male. — Length, 11 mm. 
Reddish-brown throughout, wing nervures darker. 
Mandibles finely striate. Clypeus, head and thorax coarsely and irregu- 
