20 NEW SPECIES OF AUSTRALIAN ANTS 



area almost rounded behind. Frontal carinas as long as their distance apart, 

 diverging slightly behind. Scapes extend beyond the occipital border by one 

 third of their length. First segment of the funiculus as long as the two following, 

 second to fourth as long as broad, rest longer than broad, apical longer than the 

 two preceding together. Eyes large and convex. Ocelli small. 



Pronotum one and a half times broader than long, sides strongly convex. 

 Mesonotum slightly longer than broad, broader in front than behind, sides 

 straight. Epinotum broader than long, sides almost straight, slightly broader 

 behind than in front. In profile pronotum and mesonotum form an even con- 

 vexity with pronotum slightly higher than mesonotiim. Dorsum of epinotum 

 straight, and inclined upward behind. Epinotal declivity feebly convex, almost 

 at right angles to the dorsum, and at least twice as long as dorsum. Node trans- 

 verse, convex on top. Tn profile thorn-like, bluntly pointed above, with anterior 

 face convex, posterior face almost straight. Legs slender. 



Collected by W. M. Wheeler. Mt, Kosciusko, N.S.W. 



Type in the National Museum of Vic. 



J5. "Prolasius robust us, new species (Plate I, figs. 18-19). 

 Worker : 



Length : 3 4-4mm. 



Light brown with thorax, antenna and legs of lighter colour. 



Microscopically punctate throughout, rather dull, with gaster more shining. 



Hair yellow, long, erect, confined to gaster, clypens and mandibles. Pubescence 

 yellowish, very fine, abundant throughout but not hiding the sculpture. 



Head slightly longer than broad, squarish, sides and occipital border very 

 feebly convex, angles broadly rounded. Mandibles triangular, furnished with 

 five strong sharp teeth. Clypeus rounded in front, not carinated. Frontal area 

 triangular. Frontal carinas short and parallel. Scapes extend beyond the 

 occipital border by half their length. First segment of the funiculus as long as 

 the two following together, the rest twice as long as broad, the apical as long as 

 the two preceding together. Eyes large and convex, ocelli small. 



Thorax twice as long as broad. Pronotum broader than long with the 

 sides strongly convex. Mesonotum twice as long as broad with the sides 

 straight. Epinotum as long as broad, with the sides feebly convex. In profile 

 the pronotum and mesonotum form an even convexity. Epinotum straight 

 elevated behind. Epinotal declivity straight, more than twice as long as the 

 dorsum. Node from above slightly convex. In profile it is thorn-like, bluntly 

 pointed, with faces slightly convex, not half as high as the epinotum. Gaster 

 large, twice as long as broad. Legs slender. 



Collected by J. Clark. Fern Tree Gully, Vic. 



Type in the National Museum of Vic. 



16.- Prolasius flavicornis, Clark. 



Clark, Mem. Nat. Mus. Vic, 8, p. 69, pi. 4, figs. 31-32, 1934. S 2 

 Worker : 



Length : 3 -4mm. 



Blackish brown ; antennas and coxa? yellowish ; legs and node brown. 



Shining, microscopically punctate throughout. Mandibles very finely longi- 

 tudinally striate. 



Clypeus produced and bluntly pointed in front, subcarinated on anterior two 

 thirds. Scapes extend beyond the occipital border by almost half their 

 length. First segment of the funiculus as long as the three following together, 



