17 



Hairs white, erect, moderately long, not very abundant, 

 rather uniformly inverting the body, scapes, and legs. 

 Pubescence absent. Chestnut-brown ; upper-surface of head 

 and epinotum darker : petiole above and gaster black ; 

 mandibles brownish-yellow, with black teeth ; dorsal surfaces 

 of scapes towards their tips blackish : legs with the middle 

 portions of the femora and flexor surfaces of the tibiae dark- 

 brown ; extensor surfaces of the latter brownish-yellow. 



Worker Media (fig. 1, e J. Length, 4-4'5 mm. 



Head smaller than that of the maxima, as long as broad, 

 with straight sides and more convex, laterally situated eyes, 

 the median lobe of the clypeus more projecting, the mandibles 

 longer and less convex, with about the same number of teeth 

 as the maxima, the antennal scapes longer, more slender, 

 extending a little beyond the posterior corners of the head. 

 In other .respects like the maxima. 



Worker Mini wet (fig. 1, d ). Length, 2'5-3 mm. 



Differing from the media in the shape of the head, which 

 is decidedly longer than broad, rounded behind, and has very 

 prominent eyes. The clypeus is longer, with longer anterior 

 lobe, and the mandibles are much longer and narrower, with 

 straight external borders and 10-11 teeth. The antennae are 

 very slender, with the scapes extending considerably beyond 

 the posterior border of the head. The head behind and the 

 dorsal portion of the thorax are much less sharply sculptured 

 than in the media and maxima, so that these regions are 

 smoother and more shining. In other respects the sculpture, 

 pilosity, and colour are much as in the media and maxima. 



Young Larva (fig. 4, a, b, c). Body plump, .with dis- 

 tinct segments, constricted behind the prothoracic segment, 

 which is large and swollen. Head rather small, broad, and 

 rounded, covered with sparse, simple hairs, without antennae 

 and with short maxillae and labium furnished with the usual 

 truncated sense-papillae. Mandibles small, flattened, falcate, 

 with long apical tooth and blunt denticles along the inner 

 border. Surface of body covered with flexuous, 2-, 3-, or 4- 

 branched hairs, except the ventral thoracic surface, which is 

 beset with simple, bristly hairs. 



Adult Larva (fig. 4, d, e, f). Body much swollen, but 

 with distinct segments. Head extremely small. Hairs almost 

 lacking, except on the head and ventral surface of the 

 anterior segments, where the hairs are short, simple, and 

 bristly. The shape of this larva suggests that it does not 

 spin a cocoon but forms a naked pupa. 



Described from six maxima, seven media, and three 

 minima workers and a dozen larvae taken from a single colony 

 at Windsor, South Australia, by Mr. H. B. White. 



