26 
AUSTRALIAN SPECIES OF RHYTI DOPON ERA MAYR 
Male. — Length, 10- 5 mm. 
Head and thorax chocolate-brown, mandibles, antennae, node, legs and 
apical margin of all segments of gaster brown, gaster bright red. Wings with 
a yellow tinge, nervures brown. 
Mandibles, scapes and antennae finely striate longitudinally. Head and 
thorax coarsely rugose, interstices very finely reticulate and shining between 
the rugae. Node shining irregularly rugose, the rugae obsolete. Postpetiole 
shining in middle, finely striate, the .striae irregular and obsolete, but with 
a longitudinally or circularly arched direction. All segments of gaster finely 
striate longitudinally, with numerous piligerous punctures. 
Hair yellow, erect, long and abundant throughout, slightly shorter on 
gaster, suberect on antennae and legs. 
Head one-seventh longer than broad behind, strongly convex behind eyes. 
Mandibles with eight strong teeth. Clypeus rather flatly convex in front and 
above. Frontal area oblong, broader than long. Frontal carinae as long as broad 
in front. Scape one-fifth longer than second segment of funiculi, first segment 
one-fourth longer than broad. Eyes occupy fully one-third of sides. Ocelli 
large and convex. Thorax barely twice as long as broad. Pronotum project- 
ting slightly in front, convex. Mesonotum one-fourth broader than long, 
strongly convex in front, feebly convex behind, dorsum convex all ways, 
mayrian and parapsidal furrows deeply impressed ; a well-defined longitudinal 
groove extends from apex to base, but almost obsolete near middle. Scutellum 
one-fourtb broader than long, flattened above. Epinotum strongly convex 
transversely. In profile pro-mesonotal suture strongly impressed. Pronotum 
short, erect, convex. Mesonotum strongly convex. Scutellum strongly con- 
vex, slightly higher in front than behind, twice as long as high. Metanotum 
longer than high, dorsum straight. Epinotum sloping downward behind, 
straight or very feebly concave, declivity short and abrupt, rounded into 
dorsum. Node hardly defined from above, very slightly broader behind than 
in front. In profile low and evenly convex from apex to base, the ventral 
spine two and one-half times longer than broad at base, sharp pointed. 
Postpetiole one-fourth broader than long, sides strongly convex, broadly cone- 
shaped. First segment of gaster almost twice as broad as long, much broader 
behind than in front, sides convex. Strongly constricted between the two 
segments. Legs short and slender. 
Habitat. — Northern Territory: Tennants Creek (J. Field) ; Alice Springs; 
Borroloola (G. F. Hill); Alexandria (G. W. Stalker, 1907). Queensland: 
Longreach (C. Barrett). Western Australia: Derby (J. G. Campbell); 
Jigalong (J. Hickmer). 
Rhytidoponera corniita Emery. 
(PL III, fig. 4.) 
Ectatomma (Rhytidoponera) cornutum Emery, Ann. Soc. Ent., Belg., 
xxxix, p. 347, 1895, ^ . 
Rhytidoponera (Rhytidoponera) cornuta Emery, Gen. Ins., fasc. 118, 
p. 38, 1911,^ . 
Rhytidoponera cornuta Em., Forel, Arkiv. f. Zook, 9, 16, p. 11, 1916, 
^ $ . 
Rhytidoponera cornuta Em., Crawley, Ann. Mag. Nat. Hist., 9, xvi, 
p. 585, figs. 1-3, 1925, 5 . 
Worker. — Length, 11 mm. 
