18 
AUSTRALIAN SPECIES OF RHYTIDOPONERA MAYR 
24. Node as long as stalk in front, almost parallel, 
dorsum rounded into posterior face, spine very long 
and slender. Gaster very finely and densely striate 
transversely. Chocolate brown. 11 mm. dixoni sp. nov. 
25. Node rather low, much longer at base than at top. 
Posterior face shorter than dorsum into which it is 
rounded, anterior face sloping forward at an acute 
angle. Spine long, slender and sharp. Postpetiole 
transversely arched striate, first segment of gaster 
longitudinally striate. Blackish brown. 9-5 mm. 
gregoryi sp. nov. 
26. Node higher than long, anterior face vertical, 
inclined forward, dorsum straight, inclined down- 
ward behind, both edges sharp. Spine short, slender 
and sharp. Gaster very finely and densely striate 
transversely. Bright ferruginous. 8-8-5 mm. .. 
barnardi sp. nov. 
27. Node as high as long, anterior face straight, vertical, 
posterior face straight, inclined slightly forward 
above, as long as dorsum, the latter straight. Spine 
long, parallel, slender and bluntly pointed. Gaster 
very delicately striate transversely. Bright ferru- 
gineus. 7 mm carinata, sp. nov. 
28. Angles sharply rounded, sculpture fine 33 
29. Node cubic, faces parallel, spine three times longer 
than broad at base, slender and sharp. Gaster very 
finely and densely striate, transversely arched. Body 
almost smooth, bright ferrugineus. 10-11 mm. .. 
ferruginea sp. nov. 
30. Anterior face of node sloping forward below, pos- 
terior face feebly convex inclined forward above, 
rounded into dorsum. Spine long, broad and sharp 
pointed. Gaster transversely arched reticulate- 
striate. Black. 10 mm aciculata Sm. 
31. Node sharply pointed above in front, anterior face 
vertical, straight, dorsum and posterior face united 
in a convexity, spine long, broad and bluntly 
pointed. Gaster transversely striate. Blackish 
brown. 12 mm . . cristata Mayr 
32. Node higher than long, parallel, dorsum straight, as 
long as posterior face. Spine short, thorn-like. Gaster 
finely and densely reticulate-punctate. Black. 11 
mm var. pmictiventris For. 
33. Node higher than long, anterior face concave, 
posterior face straight, vertical, rounded into 
dorsum. Spine short, thorn-like. Gaster very deli- 
cately striate transversely. Brownish red. 9-9-5 
mm yorkensis For. 
34. Occipital border short and straight, angles broadly 
rounded. Crest absent or very feeble. Eyes at pos- 
terior third of head. Sculpture fine 42 
