A REVISION OF THE GENUS PROMYRMECIA EMERY (FORMICIDAE) 123 
furrows feebly indicated. Node fully one-third broader than long, anterior edge 
feebly concave in middle. Postpetiole almost twice as broad as long. Legs stout. 
Habitat —Western Australia: Hovea; Mt. Dale; Mundaring (J. Clark). 
Promyrmecia opaca sp. nov. 
Plate XLV, figs. 46-47 
Worker. Length 11-11-°5 mm. 
Head, thorax and gaster black; dorsum of epinotum, node and in parts the 
postpetiole blood-red; mandibles yellow, antennae and legs reddish-brown. 
Mandibles coarsely punctate-rugose in front, finely reticulate on basal half. 
Head finely and densely striate-rugose longitudinally, very finely and densely 
reticulate between striate. Pronotum, mesonotum and anterior fourth of epinotum 
longitudinally striate-rugose, coarser than on head, epinotum transversely rugose. 
Node irregularly, almost circularly rugose. Postpetiole and gaster very finely 
and densely reticulate. 
Hair yellow, short and erect throughout, longer and more abundant on apical 
segment of gaster, very short and suberect on antennae and legs. Pubescence white, 
very fine and adpressed, abundant on postpetiole and gaster, but not hiding the 
sculpture. 
Head slightly broader than long, occipital border straight, sides feebly convex, 
angles rounded. Mandibles barely as long as head, external border feebly concave 
in middle, inner border convex, furnished with five large sharp teeth with a small 
tooth between each of the larger, first two teeth small. Scapes extend beyond 
occipital border by barely their thickness; first and second segment of funiculus 
equal in length, remainder subequal. Thorax almost two and one-fourth times 
longer than broad. Pronotum almost twice as broad as long, strongly convex in 
front and on sides, flatly convex above. Mesonotum one-sixth broader than long, 
convex in all directions, meso-epinotal suture deep. Epinotum longer than broad, 
flattened transversely; in profile pronotum raised and sloping backward, straight, 
rounded into the rather flattened dorsum. Mesonotum convex, higher than pro- 
notum, meso-epinotal suture deep. Epinotum convex from base to foot of declivity. 
Node as long as broad, slightly broader behind than in front, all faces convex; in 
profile top half of anterior face vertical, bottom half sloping downward and forward 
at an acute angle, dorsum flattened, posterior face convex and rounded into dorsum, 
ventral spine short and sharp. Postpetiole one-third broader than long, sides 
strongly convex, constriction deep and wide. First segment of gaster broader 
than long, much broader behind than in front, sides strongly convex. Legs robust. 
Female. Length 14-15 mm. (dealated). 
Colour, as in the worker. 
Sculpture slightly coarser, more strongly rugose. Hair longer and more abun- 
dant. Pubescence darker, more yellowish, and more abundant on gaster. Apart 
from larger size and in being winged, very similar to the worker. 
Habitat—Western Australia: Tammin; Eradu (J. Clark); Dowerin (L. J. 
Newman). 
Promyrmecia cephalotes sp. nov 
Plate XLV, figs. 32-34 
Worker. Length 13-14-5 mm. 
Mandibles yellow, head and gaster black, antennae, thorax, node, postpetiole, a 
small patch on each side of first segment of gaster and all the legs yellowish-red. 
