50 
AUSTRALIAN SPECIES OF RIIYTIDOPONERA MAYR 
sparsely scattered, and some fine longitudinal rugae between the frontal 
carinae, diverging outward behind. Thorax very finely and densely reticulate 
and with lai'ge punctures as on head, but the punctures more scattered. 
Mesonotum and epinotum similar but the punctures smaller. Node striate- 
rugose, circularly, with scattered punctures. Gaster shining, with faint 
indications of transversely arched reticulations. Legs very finely reticulate 
and punctate. 
Hair yellow, long and erect on clypeus, shorter and fewer on apex of 
gaster, very short and adpressed on scapes and legs, none apparent on body. 
Head one-fifth longer than broad, broadest in front, sides convex, occipital 
border feebly convex, with a slight depression at the middle, a rather promi- 
nent crest slightly projecting in front, angles rounded and slightly produced 
outwards laterally. Mandibles with numerous very small sharp teeth. Clypeus 
broadly convex above and in front. Frontal area large and shallow, triangular. 
Frontal carinae as long as broad in front. Scapes extend beyond occipital 
border by almost half their length. Second segment of funiculus one-fifth 
longer than first and slightly longer than third, apical not as long as two 
preceding together. Eyes large and convex placed behind the middle of sides. 
Thorax barely twice as long as broad, pro-mesonotal suture sharply impressed 
Pronotum almost as long as broad, sides parallel, dorsum convex trans- 
versely. Mesonouim and epinotum strongly convex transversely. In profile 
evenly conve.x longitudinally, rounded into declivity the latter straight at an 
obtuse angle. Node almost circular on top, much broader below, with a sharp 
longitudinal groove. In profile twice as high as long, anterior face long, 
straight inclined forward to base, dorsum and posterior face united in a 
convexity, anterior edge sharp, the ventral spine long and broad, bluntly 
pointed. Postpctiole one-third broader than long, strongly convex. First 
segment of gaster fully one-third broader than long. The constriction between 
the two segments sharp but not deep. Legs long and robust. 
Male. — Length, 10 mm. 
Head and thorax chocolate-brown. Mandibles, antennae, legs and gaster 
reddish. 
Mandibles very finely striate longitudinally. Clypeus finely striate-rugose 
transversely, with some scattered shallow punctures, interstices very finely 
and densely reticidate. Plead finely and irregularly punctate rugose, the 
punctures shallow and scattered, front and interstices very finely and densely 
reticulate. Pronotum shining, delicately reticulate, with some scattered shallow 
punctures. Mesonotum and scutellum very finely and irregularly striate- 
rugose, with numerous shallow obsolete punctures, interstices densely reticu- 
late. Epinotum and node very finely striate transversely, with some shallow 
scattered punctures. Postpetiole and gaster smooth and shining. 
Hair yellow, erect and long on clypeus, very long on apex of gaster, short 
and adpressed on antennae and legs sparse elsewhere. 
^ Head one-fourth longer than broad, strongly convex behind eyes. Mandibles 
with numerous small sharp teeth. Clypeus strongly convex in front, flatly 
convex above, with a feeble depression in middle. Frontal area not defined. 
Frontal carinae as long as broad in front, almost parallel, with a strong longi- 
tudinal carina extending from clypeus to anterior ocellus. Scape as long as 
second segment of funiculus, five times longer than first segment. Eyes large 
and convex, occupying barely half the sides. Ocelli large and convex. 
Thorax barely twice as long as broad. Pronotum hardly seen from above. 
Mesonotum almost one-third broader than long, strongly convex in front, 
more broadly convex behind, mayrian and parapsidal furrows deeply 
