A REVISION OF THE GENUS PROMYRMECIA EMERY (FORMICIDAE) 125 
one-third broader than long, convex in all directions; in profile dome-shaped, the 
ventral spine sharp, very short. Postpetiole one-third broader than long, sides 
i trae First segment of gaster one-fourth broader than long. Legs long 
and slender. 
Habitat—South Australia: Cooper’s Creek (J. G. Reuther) ; Killalpaninna 
(H. J. Hillier). 
Promyrmecia hilli sp. nov 
Plate XIV, fig. 35 
Worker. Length 14°5 mm. 
Head and last two segments of gaster black. Mandibles yellow, antennae, thorax, 
node, postpetiole, first two segments of gaster and the legs reddish-yellow. 
Mandibles finely striate, a row of large piligerous punctures along their centre. 
Head finely striate longitudinally, striae spaced and densely reticulate between 
them. Pronotum longitudinally striate, the striae larger and more widely spaced. 
Mesonotum finely striate longitudinally, the striae obsolete, particularly behind. 
Epinotum coarsely striate transversely. Node circularly striate. Postpetiole and 
gaster microscopically reticulate. 
Hair yellow, erect, short and sparse throughout; there are six very long hairs 
on dorsum of pronotum. Pubescence white, very fine and adpressed, very sparse, 
noticeable only on gaster. 
Head very slightly broader than long, occipital border and sides feebly convex, 
angles broadly rounded. Mandibles as long as head, external border straight or 
feebly convex, inner border furnished with four large, sharp, erect teeth, with a 
smali tooth between each, the fourth is at the basal fourth, no teeth between it 
and the base. Frontal carinae longer than broad. Scapes extend beyond occipital 
border by barely twice their thickness. Second segment of funiculus one-sixth 
longer than first. Thorax two and one-fourth times longer than broad. Pronotum 
one-third broader than long, sides strongly convex, dorsum flattened in middle. 
Mesonotum circular, as long as broad. Epinotum one-third longer than broad; 
in profile pronotum and mesonotum combined evenly convex, pro-mesonotal suture 
feebly indicated, meso-epinotal suture deep and wide. Epinotum weakly convex 
above, broadly rounded into declivity. Node as long as broad, almost circular, but 
slightly broader behind than in front, convex in all directions; in profile longer 
than high, anterior face vertical, straight, posterior face short, rounded into dorsum, 
anterior edge blunt, the ventral spine short and sharp. Postpetiole one-third 
broader than long, sides strongly convex. First segment of gaster one-fifth broader 
than long. Legs long and slender. 
Male and female unknown. 
Habitat.—Central Australia: Finke River (G. F. Hill). 
Promyrmecia callima sp. nov 
Plate XLV, fig. 36 
Head black, mandibles yellow, base of scapes and anterior edge of pronotum 
and a spot on each side of mesonotum brown, apical half of scapes, funiculus, 
thorax, nodes and gaster yellowish-red, legs lighter, more yellowish. 
Mandibles with a row of large piligerous punctures along the centre with a 
slight ridge at each side forming a shallow groove. Clypeus very finely and densely 
te, with indications of very faint longitudinal striae at the sides. Head with 
very fine longitudinal striae widely spaced, the spaces very finely and densely 
