ANTS PROM THE OTWAY RANGES 
feebly indicated. Meso-epinotal suture not visible. In profile convex longi- 
tudinally, pro-mesonotal suture indicated, slightly depressed at epinotum, 
declivity straight or feebly concave, vertical, top edge feebly rounded into 
dorsum. Node twice as broad as long, anterior face and sides strongly convex, 
posterior face almost straight ; in profile almost twice as high as long, anterior 
face and dorsum convex, posterior face straight ; a broad blunt tooth in front 
below. Postpetiole as long as broad. Apical segments of gaster turned 
under. Legs short and robust. 
Female. — Length, 2-6 mm. 
Colour, sculpture and pilosity as in the worker. Eyes much larger, rather 
flat. Ocelli prominent. Thorax one and one-half times longer than broad. 
Pronotum scarcely visible from above. Mesonotum as broad as long, sides 
and anterior border strongly convex ; dorsum flattened, or feebly depressed 
behind. Scutellum oval, one-third broader than long, posterior border con- 
cave. Node twice as broad as long, slightly broader behind, sides and posterior 
border straight, anterior border feebly convex. Wings missing. In other 
respects similar to the worker. 
Habitat . — Beech Forest. 
Two very small nests found under logs, in both instances 
along with nest of Amblyopone ( Fulakora ) gracilis. This species 
comes nearest to D. bidens Clark from Warburton but is readily 
distinguished by the formation of epinotum and node, in addi- 
tion to the colour. 
Genus TRAPEZIOPELTA Mayr 1862. 
Trapeziopdta diadela, sp. nov. 
(PI. IV, figs. 7-8.) 
Worker. — Length, 4.5 mm. 
Castaneous ; epinotum, node and first segment of gaster black ; legs 
testaceous. Some examples are more or less suffused with black throughout. 
Shining. Head finely and superficially punctate. Mandibles with very 
sparse, shallow, scattered punctures. Top of thorax polished, with scattered 
shallow punctures towards the sides, coarser than on head. Sides of pronotum 
smooth and with few scattered punctures ; rest of sides, including node, very 
finely striate longitudinally and with scattered punctures. Epinotal declivity 
punctate. Postpetiole and gaster with fine piligerous punctures. 
Head as broad as long, as broad in front as behind, sides and occipital border 
feebly convex, angles strongly rounded. Mandibles about one-fourth shorter 
than head, external border concave, inner border strongly convex, furnished 
with two large blunt teeth near the middle and a small, more or less obsolete, 
tooth near the apex ; the second large tooth is situated just behind the middle 
and forms an angle from where the mandible is rapidly reduced to base ; the 
first is situated about one-third between second and apex. Clypeus very 
short, truncate in front. Frontal carinae produced, overhanging clVpeus and 
base of mandibles, truncate in front, approximate, confluent behind, separated 
by a deep narrow groove which extends to the posterior third of head ; the 
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