A REVISION OF THE GENUS PROMYRMECIA EMERY (FORMICIDAE) 19 
the rugae with a longitudinal direction and more or less obsolete, some obsolete 
punctures showing, the interstices densely and finely punctate, gaster very finely 
and densely reticulate. 
Hair yellowish, erect, short on head and thorax, longer on nodes and gaster, 
very short and suberect on legs, none on antennae. Pubescence yellowish, very 
fine and adpressed, forming a distinct covering on gaster but not hiding sculpture. 
Head very slightly broader than long, sides convex, occipital feebly concave in 
middle, angles rounded. Mandibles as long as head, external border feebly concave, 
inner border convex, furnished with four large, sharp, erect teeth, each preceded 
by two small teeth. Scapes just reach occipital border, first and third segments 
of funiculus equal length, one-fifth shorter than second. Thorax twice as long as 
broad. Pronotum twice as broad as long. Mesonotum slightly broader than long, 
almost circular, excision deep and wide. Epinotum one-fifth longer than broad, 
convex transversely ; in profile pronotum evenly convex from apex to base; meso- 
notum higher than pronotum and epinotum, highest in front of middle, dropping 
behind ; epinotum convex from base to bottom of declivity. Node slightly broader 
than long, broadest behind middle, convex in all directions; in profile slightly 
higher than long, anterior face high, basal half straight, upper half convex, posterior 
face short, convex, continuous with dorsum into anterior face; ventral spine short 
and sharp. Postpetiole three-fifths broader than long, sides and front strongly 
convex, broadest behind middle. First segment of gaster one-sixth broader than 
long, broadest at middle. Legs long and robust. 
Female. Length 15:5 mm. 
Colour, sculpture and pilosity as on the worker. Larger and more robust. Head 
one-eighth broader than long, mandibles not reaching occipital border by fully 
their width at base. Scapes not reaching occipital border by fully their width at 
apex. Node one-fourth broader than long, oval. Postpetiole five-eighths broader 
than long. Legs robust. Wings hyaline. 
Male. Unknown. 
Habitat—South Australia: Leigh’s Creek. 
In general appearance similar to P. harderi Forel, but distin- 
guished by the form of the mandibles, thorax and nodes. 
Promyrmecia occidentalis sp. nov. 
Plate XIII, figs. 30, 31 
Worker. Length 11-12 mm. ; 
Head, pronotum, mesonotum and gaster black; mandibles yellow, antennae and 
legs reddish-yellow ; epinotum, node and postpetiole light red. 
Head finely striate-rugose, interstices densely reticulate. Pronotum more coarsely 
striate-rugose, longitudinally arched. Mesonotum _and epinotum longitudinally 
striate-rugose, declivity of epinotum transversely striate. Node irregularly rugose. 
Postpetiole and gaster microscopically reticulate. 
Hair yellow, short and erect, sparse throughout, but more abundant and longer 
on gaster. Pubescence white, apparent on postpetiole and gaster, very fine and 
adpressed. As . 
Head very slightly broader than long, occipital border straight or feebly concave, 
sides convex, angles rounded. Mandibles as long as head, external border concave, 
inner border convex, furnished with five large, sharp, erect teeth, with two small 
teeth between each. Scapes extend beyond occipital border by their thickness; 
second segment of funiculus one-fourth longer than first. Thorax two and one- 
