114 A REVISION OF THE GENUS PROMYRMECIA EMERY (FORMICIDAE) 
short and triangular, furnished with three strong sharp teeth. Frontal carinae short 
and depressed. Insertions of antennal scapes exposed. Scapes one-fourth longer 
than broad, almost twice as long as first segment of funiculus, second segment five 
times longer than first. Thorax barely twice as long as broad. Pronotum five 
times broader than long, strongly convex. Mesonotum one-fourth broader than 
long, mayrian furrows sharply but not deeply impressed, parapsidal furrows sharply 
impressed. Scutellum one-third broader than long; in profile pronotum erect, 
convex. Mesonotum raised, convex, mayrian furrow deeply impressed. Scutellum 
dome-shaped, longer than high. Epinotum convex from base to foot of declivity. 
Node one-sixth broader than long, almost circular; in profile the anterior face 
sloping gradually backward, posterior face short and straight, dorsum convex, 
both edges rounded; the ventral spine short and sharp. Pronotum almost twice 
as broad as long, sides strongly convex. First segment of gaster one-fifth broader 
than long. Legs long and slender. 
Habitat —W estern Australia: Perth; Armadale; Ludlow (J. Clark). 
In size and colour this species resembles P. michaelseni Forel. 
The sculpture is quite different. 
Promyrmecia chrysogaster n.sp. 
Plate XIII, fig. 23 
Worker. Length 9 mm. 
Black; mandibles, antennae and anterior coxae brown; legs, including middle 
and hind coxae, yellow. 
Mandibles with coarse obsolete striae in the middle of dorsum, finely reticulate 
on basal third. Head finely striate longitudinally. Thorax and node longitudinally 
striate, more coarsely than on head, epinotal declivity transversely striate. Post- 
petiole and gaster microscopically punctate. 
Hair yellow, fine, long, erect and abundant throughout, shorter on legs, none 
on antennae except at apex of scapes. Pubescence white, very fine and adpressed 
throughout, long and very abundant on postpetiole, yellow on gaster, long and 
adpressed, forming a golden covering hiding the sculpture. 
Head as long as broad, sides and occipital border straight, angles broadly rounded. 
Mandibles as long as head, external border strongly concave in middle, inner edge 
furnished with six large, sharp, erect teeth with a small tooth between each. 
Frontal carinae as long as broad behind. Scapes not extending to occipital border 
by fully their thickness. Second segment of funiculus one-fifth longer than first. 
Thorax twice as long as broad. Pronotum twice as broad as long, sides and front 
convex. Mesonotum one-third broader than long, oval. Epinotum one-fifth longer 
than broad; in profile convex in front, dorsum of pronotum, mesonotum and 
epinotum straight with a deep and wide incision at meso-epinotal suture, declivity 
of epinotum shorter than dorsum into which it is rounded. Node as long as broad, 
convex in all directions; in profile slightly higher than long, anterior face sloping 
backward, convex, rounded into the convex dorsum, posterior face slightly concave, 
the top edge rounded, the ventral spine short and blunt. Postpetiole one-third 
broader than long, sides and front strongly convex. First segment of gaster 
broader than long, sides convex. Legs slender. 
Male and female unknown. 
Habitat—Queensland: Brisbane (C. Barrett). 
The general colour gives this species the appearance of P. 
fulvipes Roger; it is, however, more closely related to P. michael- 
sent Forel. 
