68 
AUSTRALIAN SPECIES OF RHYTIDOPONERA MAYR 
in front, obsolete behind. Scutellum almost circular, broader than long. 
Epinotum strongly convex transversely. In profile pro-mesonotal suture 
deeply impressed. Pronotum strongly convex and sloping downward in 
front. Mesonotum strongly convex in front, posterior fourth flat and straight. 
Scutellum dome-shaped, fully twice as long as high. Metanotum longer than 
high, bluntly pointed. Epinotum convex and sloping downward in front, 
the ventral spine thorn-like, as long as broad at base. Postpetiole one-third 
broader than long, sides strongly convex. First segnient of gaster one-third 
broader than long, slightly broader behind than in front, sides convex. 
Constriction between the two segments deep and narrow. Legs long and 
slender. 
Habitat. — Victoria: Lake Hattah (J. E. Dixon); Patho (H. Potter). 
Neiv South Wales: Finley (W. B. White). South Australia: Murray 
Bridge (A. H. Elston). 
lihytidoponera nodifera Emery. 
(PI. V, figs. 45-46.) 
Ectatomma ( Rhytidoponera) convcxum Mayr var. nodifcrum Emery, 
Ann. Soc. Ent. Belg., xxxix, p. 348, 1895, 5 . 
Rhytidoponera (Rhytidoponera) convc.ra Mayr var. nodifera Emery, 
Gen. Ins., fasc. 118, p. 38, 1911,^ 
Ectatomma (Rhytidoponera) rothneyi Forel, Ann. Soc. Ent. Belg., xliv, 
p. 56, 1900, 
Rhytidoponera rothneyi subsp. medi-ana Viehm., Ent. Meitt., Berlin, 
xiii, p. 224, 1924, ?? . 
Rhytidoponera pronotalis Crawley, Ann. Mag. Nat. Hist., 9, xvi, p. 588, 
1925, 5 . 
Worker. — Length, 9-10 mm. 
Head, thorax and node blackish-brown ; gaster black, with a faint metallic 
green reflection, particularly in live specimens. Basal half of mandibles and 
scapes brown, apical half of mandibles, the whole of the funiculus and legs 
lighter, more reddish. 
Mandibles and scapes very finely striate longitudinally. Head coarsely 
punctate-rugose, the punctures deep and shining at bottom. Thorax and 
node very finely striate-rugose and rather densely covered with large, deep, 
shining punctures. The striation on pronotum is longitudinal on the basal 
half, transversely arched on apical half. Mesonotum and epinotum trans- 
versely striate. Node circularly striate. Postpetiole and first segment of 
gaster finely striate transversely, arched at the front of both segments, with 
numerous small shallow punctures. 
Hair yellow, long and erect on clypeus, front of head and apex of gaster, 
shorter and suberect on antennae and legs, very short, fine and adpressed 
on gaster, not apparent on thorax and node. Pubescence on funiculus only. 
Head one-sixth longer than broad, broader in front than behind, sides 
convex, occipital border straight, angles strongly rounded, some examples 
show a feeble crest, but others show no crest. Mandibles with numerous 
small teeth. Clypeus strongly convex above and in front. Frontal area 
large and shallow. Frontal carinae not as long as broad in front, about one- 
third broader in front than behind. Scapes extend beyond occipital border 
by fully one-third their length. First and third segments of funiculus equal 
