- 
169 
than elsewhere; a few hairs on abdomen, and a conspicuous 
fascicle on each side of base of its upper-surface, its excavated 
portion glabrous. 
Head rather stout and finely granulate, with a vague 
median line; with a short subtriangular projection from 
mouth. Antennae not much longer than head, feebly dilated 
ne ex, circular in transverse section 
i n o 
upper-surface, the excavation widely and shallowly encroach- 
ing on middle of convex portion; its under-surface incurved 
ween apex and coxae. Metasternum unarmed. Femora 
moderately stout, unarmed ; front trochanters feebly dentate ; 
tibiae thickened at apex, the middle ones feebly produced at 
inner apex. Length, 2-225 mm. 
Differs in having slightly shorter antennae, under- 
surface of abdomen evenly convex, the pygidium non-foveate, 
from nests of Iridomyrmex conifera (J. S. Clark). Type, 
I. 10626. 
size and general appearance somewhat eU a A. 
sternum of the male is flattened and somewhat depressed 
posteriorly, its dense clothing causes the flat space to appear 
conspicuously triangular, and at each corner of the base of 
the triangle there is a feeble fascicle that has the appearance 
a small tooth. The feeble armature of the legs (confined to 
the middle tibiae and front trochanters) is very unusual in 
the males of Articerus. 
ARTICERUS WILSONI, n. Sp. 
Pl. xxv., figs. 5 and 6. 
d. Castaneous, some parts slightly darker than others, 
basal half of antennae darker than apical half. Clothing as 
€scribed in preceding species. : 
Head very short, part in front of eyes slightly wider than 
long, a shallow depression in middle between eyes, on each side 
of which is a minute black elevation ; surface finely granulate. 
Antennae ci "us sit -section, basal h ow and 
i dew > circular in transverse 
