1953] 
Brown — Indo- Australian Strumigenys 
163 
proximately the anterior half of the mesosternum, lined 
with an abundant erect pile, apparently related to some 
secretory function. Propodeal teeth reduced to small, in- 
conspicuous, depressed blunt processes, completely involved 
in the broad, convex infradental lamellae. 
Petiole arched-claviform, the node long, low, scarcely 
differentiated from its peduncle as seen from any view. 
Ventral spongiform strip fairly well developed, not deep; 
posterodorsal collar rather broad, ending on each side in 
well developed posterolateral flaps, each of which is in turn 
extended as a slender, anteriorly tapered strip forward 
along the sides of the node about to the level of its indefinite 
juncture with the peduncle. Postpetiolar node seen from 
above subcircular, very nearly as long as broad and slight- 
ly broader than the petiolar node, convex, closely sur- 
rounded by spongiform tissue and with large ventral spongi- 
form lobes. Gaster with a conspicuous thick anteroventral 
pad of spongiform tissue and fine, short subreclinate hairs, 
anterodorsally with a flange-like transverse spongiform 
margin. Basal costulae of first gastric segment rather fine, 
short, extending about i/i the length of the basal segment 
in the middle; remainder of gaster smooth and shining, as 
are the mandibles. 
Head, alitrunk and both nodes densely and irregularly 
punctulate-granulose, opaque. The ground punctulation is 
relieved at intervals by larger, more irregular secretory 
pits, most conspicuous on head and promesonotum. The 
larger secretory lacunae, bordered by a low ridge and 
usually conspicuous by virtue of the whitish encrustation, 
appear to be formed of many confluent secretory pits. The 
largest pair are subcircular, located behind the humeral 
tubercles, occupying the greater part of the posterolateral 
pronotal surfaces. Another large linear pair, deep and 
groove-like, follow the humeral margins on each side; and 
another pair, adjacent to and surrounding the lateral open- 
ings of the mesosternal groove, are also of good size. A 
smaller, but very distinct groove on each side of the pro- 
podeum below the spiracle, running posteriorly onto the 
infradental lamella. Small lacunae are also found on the 
anterolateral faces of the petiolar node, dorsolaterally on 
the propodeum at the bases of the teeth, and on each end 
