120 A REVISION OF THE GENUS PROMYRMECIA EMERY (FORMICIDAE) 
third times longer than broad. Pronotum twice as broad as long, strongly convex 
on front and sides. Mesonotum slightly broader than long, convex in all directions. 
Epinotum one-third longer than broad, flattened laterally ; in profile evenly convex 
to base, suture sharply impressed. Mesonotum convex, highest at middle, suture 
deep and wide. Epinotum evenly convex from base to apex. Node circular, as 
long as broad; in profile as high as long, anterior and posterior faces vertical, 
straight, dorsum convex, edges rounded. Ventral spine short and sharp. Post- 
petiole one-third broader than long, sides convex. First segment of gaster one- 
seventh broader than long, sides evenly convex. Legs long and slender. 
Female. Length 13 mm. 
Head, pronotum, scutellum, mesonotum and gaster black, mandibles and labrum 
yellow, basal half of scapes brown, apical half and all the funiculus and legs reddish- 
yellow, epinotum, node and postpetiole red. 
Sculpture similar to that of worker but coarser, the dorsum of epinotum irregu- 
larly, not longitudinally, rugose. 
Pilosity similar but longer and more abundant. 
Head one-tenth broader than long, sides feebly convex, occipital border concave, 
angles rounded. Mandibles barely as long as head, straighter and more strongly 
toothed than in worker. Scapes barely reach occipital border. Node one-fourth 
broader than long. 
Male. Unknown. 
Habitat—Western Australia: Tammin; Eradu (J. Clark); Merridin (L. J. 
Newman) ; Beverley (E. du Boulay). 
Resembles P. chasei, but distinguished by the more slender and 
smaller size, as well as the yellow antennae and legs. 
Promyrmecia celaena sp. nov 
Plate XIV, fig. 42 
Worker. Length 10-11 mm. 
Black; mandibles yellow, antennae and legs brown, tarsi reddish-brown. 
Mandibles coarsely striate-rugose on apical two-thirds, very finely striate on 
basal third. Head finely striate longitudinally, interstices wide and densely punctate- 
reticulate. Pronotum and mesonotum longitudinally striate-rugose, transversely 
arched on front of pronotum, epinotum irregularly punctate-rugose, the punctures 
large and shallow, node more coarsely rugose; postpetiole irregularly striate- 
rugose, the rugae with a more or less longitudinal direction, interstices densely 
reticulate, gaster microscopically punctate-reticulate. 
Hair yellow, fine, short and erect on head and thorax, longer on node and gaster, 
short and sub-erect on legs. Pubescence white, very fine and adpressed, abundant 
throughout, long and more dense on postpetiole, longer and coarser on gaster, 
forming a faint yellowish covering but not hiding sculpture. 
Head slightly broader than long, sides convex, occipital border concave, angles 
broadly rounded. Mandibles not as long as head, fully their width at base shorter, 
external border concave, inner border convex, furnished with four large, sharp, 
erect teeth, each preceded by two smaller teeth. Scapes not extending to occipital 
border by fully their thickness; first and second segments of funiculus equal in 
length, third very slightly shorter. Thorax twice as long as broad. Pronotum 
twice as broad as long, convex in all directions. Mesonotum one-sixth broader 
than long, one-fifth longer than pronotum, excision deep and wide; epinotum as 
long as broad, convex laterally; in profile pronotum convex from apex to base, 
