1953] 
Brown — I nclo- Australian Strumigenys 
165 
teeth, the dorsal tooth virtually straight in its apical half, 
the ventral tooth parallel to the dorsal and about half as 
long, its extreme tip gently deflected ventrad ; a single min- 
ute, acute intercalary denticle present. The dorsal apical 
tooth is about 0.17 mm. long, or slightly more. Shaft of 
mandible straight, broad, depressed, slightly narrowed to- 
ward base; external border feebly convex, inner border 
straight, except for brief weakly concave apical and basal 
stretches, and with dorsal and ventral subcultrate margins. 
The gentle preapical concavity, just at the point where it 
joins the straight section of the inner border, bears a very 
low, obtuse vestige of a translucent angle, just barely per- 
ceptible at higher magnifications and then only in certain 
views. This insignificant vestige is probably homologous 
with the preapical tooth or angle in the majority of Indo- 
Australian Strumigenys species. The reduction of the pre- 
apical tooth can be followed in the series honing sb erg eri, 
formosensis, hryanti, although this series probably does 
not represent the actually evolved lineage. 
The secretory pits and lacunae are arranged much as 
in the worker of S. ulcerosa, but those on the thoracic 
sclerites are somewhat restricted by the different develop- 
ment of these areas accompanying the presence of the 
wings. Scutum intricately and rather deeply rugulose- 
punctulate. Scutellum with similar sculpture; punctulation 
of mesokatepisternum partially effaced, the surface here 
more or less smooth and shining. Basal costulae of gaster 
short and fine. 
Head with moderate growth of fine, subreclinate ground 
hairs, fewer moderately long, fine erect hairs, and fewer 
still very long, outstanding, fine flagellate hairs, the latter 
concentrated along the dorsolateral and posterior occipital 
borders. Scape hairs very fine, reclinate. Alitrunk with 
numerous long, fine erect hairs, the same, becoming longer 
and flagelliform on both nodes and gastric dorsum (L up 
to 0.55 mm.), where some are as long as or nearly as long 
as the maximum depth of the gaster itself. Legs with very 
long, fine erect hairs, becoming extremely long and tapered, 
but fewer, on the posterior surfaces of the metatarsi, where 
they are often nearly as long as the elongate metatarsus 
itself. Also present on legs, alitrunk, both nodes and under- 
