108 A REVISION OF THE GENUS PROMYRMECIA EMERY (FORMICIDAE) 
Hair whitish-yellow, erect, long and abundant on body, shorter and suberect 
on legs. Pubescence grey, very fine and close lying, long and more abundant on 
postpetiole and gaster but not hiding sculpture. 
Head as long as broad, sides and occipital border convex, angles very broadly 
rounded. Mandibles fully as long as head, external border concave at middle, 
inner border convex, furnished with six large, sharp, erect teeth, the first three 
large teeth each preceded by two small denticles. Scapes not extending to occipital 
border by fully their thickness, first and second segments of funiculus equal length, 
third one-seventh shorter. Thorax two and one-half times longer than broad; 
pronotum one-third broader than long, strongly convex in all directions, mesonotum 
circular, as long as broad, meso-epinotal excision deep, epinotum one-fourth longer 
than broad, feebly convex transversely; in profile pronotum weakly convex from 
apex to base; mesonotum higher than pronotum, highest at middle, strongly convex ; 
excision deep; epinotum high and convex, highest behind, broadly rounded into 
declivity. Node as long as broad, pear-shaped, broadest behind; in profile as high 
as long, anterior and posterior faces short and vertical, both rounded into the 
convex dorsum, ventral spine short and sharp. Postpetiole as long as node, one 
and three-quarter times broader than long, sides and front strongly convex, 
constriction sharp and deep. First segment of gaster one-fourth broader than 
long, broader behind than in front. Legs long and slender. 
Male and female unknown. 
Habitat——V ictoria: Lake Hattah (J. E. Dixon). 
The smallest species in the genus. In colour and sculpture this 
somewhat resembles wrens Lowne, but the structure is quite 
different. 
Promyrmecia dichospila Clark 
Plate XV, figs. 53-55 
Myrmecia (Promyrmecia) dichospila Clark, Proc. Roy. Soc. Vict., 50 (2), 
p. 359, fig. 2, 1938, ¥§ 9 3. 
Worker. Length 7-9 mm. 
Black, dorsum of node and a large spot on epinotum red. Mandibles yellow at 
base, reddish-yellow towards apex, teeth brown, Labrum reddish-yellow. Scapes 
brown, funiculi reddish-yellow. Tarsi and apex of tibiae brownish-yellow. 
Mandibles finely striate-reticulate with a row of large deep punctures along the 
inner borders. Head finely striate-rugose longitudinally, densely and finely 
reticulate, not striate. Pronotum striate-rugose, transversely arched. Mesonotum 
striate-rugose longitudinally. Epinotum and node coarsely and irregularly rugose. 
Postpetiole and gaster very finely reticulate, 
Hair yellowish, long and erect, particularly on clypeus and last three segments 
of gaster. None on antennae, very short and sparse on legs. Pubescence greyish, 
very fine and adpressed, long and abundant on gaster. 
Head as long as broad, sides and occipital border straight, angles broadly 
rounded. Mandibles one-fifth shorter than head, external border concave, inner 
border strongly dentate, the third, fifth, seventh and ninth teeth twice as large as 
the others, the ninth forming a slight angle. Scapes not extending to occipital 
border by twice their thickness; first and second segments of funiculus equal in 
length, third one-fourth shorter. Thorax two and one-half times longer than 
broad. Pronotum one-third broader than long, strongly convex in all directions. 
Mesonotum circular, as long as broad. Epinotum slightly longer than broad, 
strongly convex transversely; in profile pronotum strongly convex from apex to 
