A REVISION OF THE GENUS PROMYRMECIA EMERY (FORMICIDAE) 141 
than broad, almost flat transversely; in profile pronotum raised, strongly convex 
from apex to base. Mesonotum convex, highest in front and slightly higher than 
pronotum and epinotum, excision deep, sharp at bottom. Epinotum convex from 
base to foot of declivity. Node very slightly broader than long, broadest at middle, 
broader behind than in front; in profile slightly higher than long, anterior and 
posterior faces straight and vertical, both rounded into the feebly convex dorsum, 
ventral spine long, thin and sharp, as long as broad at base. Postpetiole one-third 
broader than long, strongly convex in all directions, constriction deep but not wide. 
First segment of gaster very slightly broader than long, broader behind than in 
front. Legs long and robust. 
Female. Length 16-20 mm. 
Colour as on the worker. Sculpture coarser. Pilosity more abundant and longer, 
the pubescence on postpetiole and gaster longer and more abundant, bright brass 
yellow. 
Head one-ninth broader than long, sides and occipital border straight, angles 
rounded. Mandibles much shorter than head, external borders straight or feebly 
convex, inner border strongly convex, furnished with twelve long, sharp, erect 
teeth, broad at base. Scapes not extending to occipital border by fully their thick- 
ness. Node one-third broader than long, broadest just behind middle, anterior and 
posterior borders straight, sides convex. Postpetiole three-fifths broader than 
long, strongly convex. First segment of gaster broader than long, broadest in 
front of middle, broader behind than in front. Wings with 2 yellow tinge. 
Male. Length 11:5 mm. 
Colour, and pilosity, as in the worker, sculpture more punctate-reticulate. 
Head as broad as long, strongly arched from behind, semi-circular. Mandibles 
triangular, inner border furnished with one large sharp tooth at basal angle. Scapes 
not extending to posterior border of eyes, twice as long as first segment of funiculus, 
second segment three times longer than scape. Thorax barely twice as broad as 
long. Pronotum very short, semi-circular. Mesonotum broader than long, parap- 
sidal furrows sharply impressed, mayrian furrow sharply impressed in front, 
feebly impressed behind. Scutellum slightly broader than long, dome-shaped. 
Epinotum one-third broader than long, strongly convex. Node as long as broad, 
slightly broader behind, almost circular. Postpetiole one-fifth broader than long, 
broadest behind middle, bluntly rounded in front, constriction deep and wide. First 
segment of gaster broader than long, sides strongly convex. Legs slender. Wings 
with a yellowish tinge. 
Habitat.—N ew South Wales: Sydney ; Thornleigh; Peak Hill (W. W. Froggatt). 
Queensland: Stanthorpe; Fletcher (E. Sutton). 
Tasmania: Burnie (N. Howes). 
Victoria: Frankston (C. Barrett) ; Belgrave (J. Clark) ; Eltham (J. E. Dixon) ; 
Broadmeadows (F. P. Spry). 
The specimens from Tasmania are identical in every detail with 
those from Sydney. 
Promyrmecia piliventris Smith s.sp. rectidens Forel 
Plate X VIL, fig. 87 
Myrmecia piliventris Smith var. rectidens Forel, Rev. Suisse Zool., xviii, 
p. 5, 1910 
Myrmeciga (Pristomyrmecia) piliventris Smith var. rectidens Emery, Genera 
Insect., fasc. 118, p. 21, 1911. 
