64 
AUSTRALIAN SPECIES OF RHYTIDOPONERA MAYR 
transvei'sely, with a faint longitudinal groove in middle. In profile pronotum 
short and erect, convex in front. Mesonotum erect, strongly convex in front 
and on dorsum, posterior fourth flattened, sutures sharply defined. Scutel- 
lum erect, strongly convex above, longer than high. Metanotum erect, as 
high as long, convex above. Epinotum sloping downward behind at an obtuse 
angle, slightly convex in front, straight behind, declivity short and straight 
at an acute angle. Node not defined, very slightly broader than stalk in 
front, feebly convex, very slightly flattened on top. In profile low and convex, 
slightly higher behind than in front. Ventral spine very slender and sharp, 
fully twice as long as broad at base. Postpetiole fully one-third broader 
than long, sides and front strongly convex. First segment one and three- 
fourths times broader than long, broader behind than in front, sides convex. 
The constriction between the two segments sharp but not deep. Genitalia 
retracted. Legs long and slender. 
Habitat . — Western Australia: Eradu; Mullewa (J. Clark). 
In sculpture this species comes near E. punctata Sm., but 
is readily separated by the size and form. 
Rhytidoiwnera flavicornis sp. nov. 
(Text fig. 4.) 
Worker. — Length, 7 -5-8 mm. 
Head, thorax and node brown, mandibles and legs lighter brown, scapes 
black, funiculi reddish at apex, gaster shining, reddish-brown. 
Mandibles and scapes very finely and densely striate longitudinally. Clypeus 
finely punctate- rugose longitudinally. Head very finely and densely striate- 
reticulate, striae diverging outward behind, with a few small, very shallow, 
scattered punctures. Pronotum more densely and finely striate-reticulate, 
with a more or less circular direction, punctures smaller, shallower and fewer 
than on head. Mesonotum and top of epinotum more strongly striate-reticu- 
late, transA'ersely ; epinotal declivity more striate-rugose; punctures smaller, 
deeper and more abundant. Top of node strongly punctate-rugose, punctures 
large and deep. Postpetiole very finely and densely striate, transversely 
arched. First segment of gaster very finely striate longitudinally. Legs 
densely reticulate. 
Fig. 4. Rhytidoponera fl.avicornis sp. nov. 
Worker. 
Hair yellow, long and erect on front of clypeus, under surface of head, 
and apex of gaster, very short and sparse on head, thorax and antennae, more 
abundant but very short and adpressed on gaster and legs. 
