AUSTRALIAN FORMICIDAE 
75 
Carinae of cheeks strong, extending back level with the posterior margins of 
eyes. Eyes large and convex, placed at middle of sides. Scapes extend very 
slightly beyond posterior margins of eyes ; second and third segments of 
funiculus equal in length, one-sixth longer than first, apical as long as the two 
preceding combined. Thorax one and one-half times longer than broad, as 
broad through epinotum as through pronotum, without traces of sutures. 
Pronotum broadly convex in front, strongly convex on sides, anterior angles 
sharp, the three borders strongly margined, mesonotal region strongly con- 
stricted, one-fourth narrower than pronotum, sides not margined. Epinotum 
strongly convex on sides, posterior border straight with a small sharp indention 
in the middle, the angles sharp, the three borders strongly margined; in 
profile strongly convex longitudinally, without traces of sutures, declivity 
feebly convex, sides margined. Node one-third broader than long, broadest 
at the middle, anterior border straight, sides strongly convex, the three borders 
strongly margined, anterior angles sharp, posterior angles produced backward 
as broad sharp spines as long as broad at base; in profile as long as high, 
anterior face vertical, slightly concave, superior edge sharp, dorsum convex, 
rounded into the convex posterior face, dorsal margin straight to posterior 
fourth ending in a broad sharp spine directed backward and upward, almost 
twice as long as broad at base. Postpetiole one-fifth broader than long, 
broadest at middle, anterior border concave, submarginate, sides strongly 
convex, anterior half feebly margined, constriction deep and wide. First 
segment of gaster one-third broader than long, strongly convex on sides. Legs 
long and slender, posterior coxae with a broad translucent laminae. 
Male and female unknown. 
Habitat. — Victoria: Hattah (J. Clark, Sept. 1939). 
The node of this species is similar to that of P. gt'andis 
Clark, from South Australia. The size, colour and other 
features are quite different. No nest of the species was seen ; 
several workers were found foraging in the Mallee scrub. 
Phyracaces dromus sp. nov. 
Plate XIII, Figs. 2, 3. 
Worker. Length 4 2 mm. 
Ferruginous; head, antennae and legs lighter, more yellowish, eyes and 
margins of thorax and node black. 
Shining, microscopically reticulate throughout, numerous fine shallow 
piligerous punctures. 
Hair yellow, erect, long and abundant, particularly on gaster, short and 
suberect on antennae and legs. 
Head very slightly longer than broad, sides and occipital border convex, 
angles rounded. Mandibles short and broad, furnished with numerous short 
sharp teeth. Frontal carinae erect and parallel truncate behind, carinae of 
cheeks prominent, extending to anterior edge of eyes with a short branch 
extending inward near the apex. Eyes large, flatly convex, placed at middle 
of sides. Scapes extend to middle of eyes ; first segment of funiculus as long 
as the second and third combined, second to ninth broader than long, apical 
bluntly pointed, as long as the three preceding combined. Thorax twice as 
long as broad, without traces of sutures, sides and posterior border sharply 
margined, anterior border feebly margined, angles blunt, posterior angles 
sharp ; in profile convex longitudinally, a strong sharp ridge extends from the 
anterior superior angle down to the anterior inferior angle, epinotal declivity 
