1930 ] 
Two Neiv Ants from Java 
199 
In the male the mandibles are very short and have rounded 
points; the fore wings have few veins or more commonly 
none at all; the hind wings are veinless; the genitalia are 
non-retractile. The larva differs in the constriction of the 
body at the first abdoimnal segment; the absence of hairs 
on the head ; and the presence of long hairs on the abdomen, 
especially the extremely long pair at the posterior end. 
But these differences become trivial and insignificant be- 
side three characteristics which not only separate it from 
doryline larvae but render it unique among all the known 
ant larvae, namely, the plowshare-like structure projecting 
from ventral side of the prothorax, a “tympanum” on 
either side of the fourth abdominal segment, and the 
toothed flaps at either side of the labrum. 
We offer the following as a formal definition of the sub- 
family : 
Subfamily Leptanillinw (W. M. Wheeler) (1910) 
$ Hypogaeic, monomorphic, minute. Clypeus with a 
straight border, sometimes with two lobes prolonged be- 
tween frontal carinae, which are short. No carinae on 
cheeks. Mandibles straight and toothed. Maxillary and 
labial palpi each with one segment. Eyes absent. Antennae 
12-jointed, inserted farther apart than in the Dorylinae 
and having a filiform funiculus. Promesonotal suture 
marked, other dorsal sutures completely absent. Epinotum 
unarmed. Tibiae with a pectinate spur. Claws simple. 
Petiole of two segments, both nodiform and of almost 
the same size. Gaster elongate, oval. Pygidium simple. 
9 Head and thorax like that of the worker. The suture 
behind the anterior legs fading out dorsally. Wingless. 
Postpetiole not separated from the following segment by 
a constriction. Gaster long ; cloaca open leaving the 
sting exposed. Hypopygium longer than the pygidium, 
with two lateral lobes bent back dorsally. 
$ Head large, more or less rectangular. Clypeus and 
frontal carinae somewhat as in worker or indistinct. Man- 
dibles very short, small, rounded, and toothless. Maxillary 
and labial palpi prominent, one-jointed. Eyes conspicuous, 
hairy. Antennae 13-segmented. Scape nearly or quite as 
long as the next two segments together. Funiculus filiform, 
