140 A REVISION OF THE GENUS PROMYRMECIA EMERY (FORMICIDAE) 
with eight or nine large, broad, sharp, erect teeth and behind these three or four 
shorter and blunt directed forwards. Scapes not extending to the occipital border 
by almost their thickness. Thorax twice as long as broad; pronotum three and 
one-half times broader than long, dorsum feebly convex. Mesonotum one-sixth 
broader than long, parapsidal furrows feebly indicated. Scutellum one-third broader 
than long. Epinotum slightly broader than long, feebly convex transversely; in 
profile pronotum and mesonotum raised and evenly convex to base of mesonotum, 
pro-mesonotal suture feebly impressed. Scutellum raised slightly above mesonotum, 
convex. Epinotum convex from base to foot of declivity. Node one-seventh broader 
than long, broadest behind middle, anterior and posterior borders straight, sides 
convex. Postpetiole one and one-half times broader than long, strongly convex 
in all directions, constriction deep but not wide. First segment of gaster one-ninth 
broader than long. Legs robust. Wings hyaline. 
Male. Unknown. 
Habitat.—W estern Australia: Armadale; Albany; Bunbury (J. Clark). 
South Australia: Lucindale; Melrose (A. M. Lea); Kangaroo Island (A. 
Campbell). 
Victoria: Mallee (J. E. Dixon). 
Similar to P. mandibularis Smith, but separated by the smooth 
postpetiole. 
Promyrmecia piliventris Smith 
Plate XVII, figs. 84-86 
Myrmecia piliventris Smith, Cat. Hymn. Brit. Mus., vi, p. 146, 1858, 3 ; 
Roger, Berl. Ent. Zeitschr., v, p. 36, 1860-61, % ; Mayr, Verh. Zool. Bot. 
Ges. Wien, xii, p. 727, 1862, ¢ ; Jour. Mus. Godeffroy, xii, p. 93, 1876, 
BQ. 
Myrmecia (Pristomyrmecia) piliventris Emery, Genera Insect., fasc. 118, 
p. 21, 1911, & ¢. 
Myrmecia (Promyrmecia) piliventris Wheeler, 
Ants, p. 67, 1933, 8 
Worker. Length 10-155 mm. 
Black; mandibles, antennae and legs dark brown, tarsi lighter, more reddish. 
Shining. Mandibles obliquely striate on apical half, more finely striate and punc- 
tate on basal half. Head longitudinally striate in front, more striate-rugose behind, 
the interstices very finely reticulate. Pronotum, mesonotum, anterior epinotum 
and node longitudinally striate-rugose, declivity transversely rugose, more coarsely 
than on head, interstices finely reticulate. Postpetiole and gaster microscopically 
punctate. 
Hair yellowish, erect and abundant, particularly long on mandibles, clypeus and 
apical segments of gaster, short and suberect on legs. Pubescence greyish, very 
fine and close-lying on antennae and legs, yellow, long and forming a dense covering 
on gaster and posterior of postpetiole. 
Head one-eighth broader than long, sides straight, occipital border feebly concave, 
angles broadly rounded. Mandibles slightly longer than head, parallel, straight or 
feebly convex on external border, inner border with five strong, sharp, erect teeth 
on apical fourth, behind these the teeth short and directed backwards, sawtooth- 
like. Scapes extend to occipital border ; first and third segments of funiculus equal 
in length, second almost one-fourth longer. Thorax fully twice as long as broad. 
Pronotum almost twice as broad as long, sides and front strongly convex, dorsum 
flattened. Mesonotum as long as pronotum, one-fourth broader than long, dorsum 
feebly convex, meso-epinotal excision deep and wide. Epinotum one-fifth longer 
Colony-founding among 
