40 
Psyche 
[March 
M. gracilis belong to the group of species comprising 
bakeri Wheeler of the Philippines, tillyardi Wheeler of 
New South Wales, johni Kara wa jew of Ceylon and jacob- 
soni Crawley of Sumatra and characterized by having the 
clypeus narrowed and blunt or bidentate anteriorly instead 
of terminating in a rectagular lobe with acute corners. 
Crawley mentions two female specimens under his descrip- 
tion of jacobsoni , taken in April and October, 1914, respec- 
tively. The former he regards as the type of jacobsoni, the 
latter, which is very similar to the female described above, 
is, I believe, specifically different. There must be several 
closely related, still undescribed species of Metapone in the 
Indomalayan and Indonesian regions. I possess males of 
two species from Singapore and Luzon Island, which differ 
from the one I described as hewitti from Borneo, but I re- 
frain from describing them till the cospecific females or 
workers turn up. 
Prosopidris subgen. nov. (of Cardiocondyla) 
Worker. Minute and closely related to Cardiocondyla. 
Antennae very similar, but 11- instead of 12-jointed. Cly- 
peus much larger, thick and swollen, perpendicularly trun- 
cated anteriorly and forming on each side a strong, oblique 
welt which bounds the antennal fossa. Thorax stout and 
rather high, evenly arcuate above in profile, without pro- 
mesonotal and mesoepinotal sutures and mesoepinotal im- 
pression ; epinotum armed with a pair of stout spines. Pe- 
tiole much as in Cardiocondyla but the node more concave 
anteriorly ; postpetiole large, broader than the petiolar node, 
as in that genus. Gaster consisting very largely of the first 
segment. Sting well-developed, short and stout. Middle 
and hind tibiae without traces of spurs; tarsal claws very 
small, simple. Pilosity lacking except on the mandibles 
and clypeus; sculpture feeble as in Cardiocondyla. 
Female. Not much larger than the worker and very simi- 
lar to the female of Cardiocondyla in the structure of the 
thorax. Postpetiole not more enlarged in proportion to the 
petiolar node than in the worker. Wing-venation much as 
in Cardiocondyla with narrow pterostigma near the mid- 
dle of the costal border, a single narrow cubital cell, no 
