A REVISION OF THE GENUS PROMYRMECIA EMERY (FORMICIDAE) 115 
Promyrmecia cydista sp. nov. 
Plate XIII, fig. 24 
Worker. Length 9-12 mm. 
Black; basal half of mandibles yellow, apical half yellowish-brown, antennae 
and legs brown, tarsi reddish-brown. 
Basal half of mandible smooth, microscopically reticulate, apical half with four 
or five large, shallow, elongate punctures. Head very finely striate longitudinally, 
interstices wide, densely and finely reticulate and with scattered shallow punctures. 
Pronotum and mesonotum longitudinally striate-rugose, coarser than on head; 
epinotum and node coarsely and irregularly punctate-rugose, all interstices finely 
and densely reticulate. Postpetiole and gaster microscopically reticulate. 
Hair yellow, short and erect, abundant throughout, longer on apical segments of 
gaster; sparse, short and suberect on legs, a few at apex of scapes. Pubescence 
whitish, very fine and adpressed throughout; yellow, longer and more abundant 
on postpetiole but not hiding sculpture, long and forming a dense covering on 
gaster. 
Head very slightly broader than long, sides feebly convex, occipital border 
feebly concave, angles broadly rounded. Mandibles shorter than head, external 
border feebly concave, inner border furnished with five large, sharp, erect teeth, 
with two smaller teeth preceding each large tooth. Scapes not extending to 
occipital border by their thickness; first and third segments of funiculus equal in 
length, second very slightly longer. Thorax twice as long as broad; pronotum 
almost twice as broad as long, sides and front strongly convex, dorsum flattened; 
mesonotum one-fifth longer than pronotum and one-sixth broader than long; 
constriction deep and wide; epinotum as long as broad, feebly convex transversely ; 
in profile pronotum evenly convex from apex to base; mesonotum much higher 
than pronotum and epinotum, highest in front, meso-epinotal excision deep, 
epinotum evenly convex from base to foot of declivity. Node one-fourth broader 
than long, broadest behind, anterior and posterior borders straight or feebly convex, 
sides strongly convex; in profile dome-shaped, higher than long, ventral spine 
thorn-like, sharp. Postpetiole one-third broader than long, broadest behind middle; 
constriction deep and wide. First segment of gaster one-fifth broader than long. 
Legs slender. 
Male and female unknown. 
Habitat —New South Wales: Lismore (C. F. Denquet) ; Dorrigo (W. Heron) ; 
Sydney (W. W. Froggatt) ; Wahroonga (H. J. Carter). 
Resembles P. michaelseni in colour but is much smaller, more 
slender and differently sculptured. The yellow mandibles, shape 
of thorax and nodes distinguish them. 
Promyrmecia chasei Forel 
Plate XIII, figs. 25-27 
Myrmecia chasei Forel, Ann. Soc. Ent. Belg., xxxviii, p. 235, 1894, ¥.: 
Myrmecia (Myrmecia) chasei Emery, Genera Insect., fasc. 118, p. 21, 
1911, %. 
Myrmecia pilosula Smith s.sp. mediorubra Forel, Rev. Suisse Zool., xviii, 
p. 7, 1910, %. 
Myrmecia (Myrmecia) pilosula Smith s.sp. mediorubra Emery, Genera 
Insect., fasc. 118, p. 21, 1911, %. 
