110 A REVISION OF THE GENUS PROMYRMECIA EMERY (FORMICIDAE) 
Myrmecia (Halmamyrmecia) pilosula Wheeler, Biol. Bull., xl, p. 195, 
1922, ¥. ] J 
Myrmecia (Promyrmecia) pilosula Clark, Vict. Naturalist, xlii, p. 140, 
1925; Wheeler, Colony-founding among Ants, p. 56, 1933, &. 
Worker. Length 12-14 mm. 
Black; mandibles, antennae, tibiae and tarsi yellow. 
Apical half of mandibles with a large longitudinal groove and some coarse 
oblique striae. Head longitudinally striae, the striae very fine and widely spaced, 
densely and finely punctate between the striae. Pronotum longitudinally striate 
in the middle, circular at the sides, the striae larger and closer than on head. 
Mesonotum longitudinally striate, sometimes more striate-rugose, anterior fourth 
of epinotum longitudinally rugose, remainder, including declivity, transversely 
rugose. Node circularly rugose with a longitudinal central carinae. All interstices 
very finely and densely punctate-reticulate. Postpetiole and gaster microscopically 
punctate-reticulate. 
Hair greyish, short, erect, moderately abundant throughout, longer and more 
abundant on gaster, very long and inclined on top and underside of mandibles, 
none on antennae, very short and suberect on legs. Pubescence white, very fine 
and short, adpressed, abundant throughout, longer and more abundant on post- 
petiole and gaster, forming a distinct covering but not hiding the sculpture. 
Head one-sixth broader than long, feebly concave behind, sides convex, angles 
rounded. Mandibles not quite as long as head, external borders straight or feebly 
concave, inner border furnished with four large, sharp, erect teeth, the fourth 
forms a slight angle near base, from there the mandible is slightly reduced, between 
the large teeth is a smaller but sharp tooth. Scapes extend beyond occipital border 
by their thickness; first and third segments of funiculus equal in length, one-tenth 
shorter than second, apical almost twice as long as the preceding. Thorax barely 
twice as long as broad. Pronotum twice as broad as long, sides and front convex, 
dorsum flattened or feebly concave. Mesonotum one-sixth broader than long, 
strongly convex in all directions. Epinotum one-eighth longer than broad; dorsum 
flattened; in profile pronotum convex from apex to base. Mesonotum higher than 
pronotum and epinotum, highest in front, flatly convex, dropping behind; meso- 
epinotal suture deep and narrow. Epinotum strongly convex from base to foot 
of declivity. Node one-fifth broader than long, convex in all directions; in profile 
one-fifth higher than long, almost dome-shaped above, all faces convex, ventral 
spine long and stout, bluntly pointed. Postpetiole barely twice as broad as long, 
strongly convex in all directions; constriction wide and deep. First segment of 
gaster one-sixth broader than long. Legs long and slender. 
Female. Length 14-16 mm. 
Colour and pilosity as on the worker. Sculpture coarser, more irregular. Node 
one and three-fourth times broader than long, sides convex, anterior and posterior 
faces straight or feebly convex. 
Male, 11-12 mm. 
Colour as on the worker. 
Mandibles shining, superficially punctate. Head behind the eyes coarsely punctate, 
the punctures large and shallow, front of head and bottoms of punctures very 
finely and densely punctate. Thorax and node irregularly punctate, the punctures 
large and shallow, obsolete in places, the whole, including postpetiole and gaster, 
very finely and densely punctate. 
Hair grey, very long and abundant throughout, shorter on legs. Pubescence 
white, slightly yellowish on gaster, very fine and abundant. 
Head one-fifth broader than long, greatly reduced behind. Mandibles triangular, 
