8 o 
Psyche 
[March 
the flanges of the sides of the propodeal 
declivity (Brown, 1953). The lateral view- 
ing position of specimens must be standard- 
ized by lining up the tips of the propodeal 
spines. 
Pronotum Width (PW) — Width of pronotum, measured in dorsal 
view, disregarding humeral angles. 
Propodeal Spine L(ength) — Maximum measurable length of pro- 
podeal spine, in lateral view, from its apex 
to the far edge of the propodeal spiracle. 
Petiole L(ength) — Length of petiole, measured in lateral view, 
from the apices of the flanges of the sides 
of the propodeal declivity to the dorsal 
posterior border of the petiolar tergite. 
Petiole Height — Height of petiole, measured in lateral view, on a 
line perpendicular to the petiole length ; 
from the dorsalmost point on the petiolar 
node to the ventral side. 
Postpetiole W(idth) — Maximum width of postpetiolar dorsum. 
Postpetiole L(ength) — Midline length of postpetiolar dorsum. 
Cephalic Index (Cl) — Head width expressed as a percentage of 
head length. HW X 100/HL 
Scape Index (SI) — SL X 100/HW 
Mesosomal Index — PW X 100/WL 
Propodeal Spine Index (Spl) — Propodeal Spine L. X 100/WL 
Petiolar Index — Petiole L. X ioo/Petiole Height 
Postpetiolar Index — Postpetiole L. X ioo/Postpetiole W. 
Genus Prosopidris Wheeler new status 
Cardiocondyla subgenus (Prosopidris) Wheeler, 1935, Psyche 42: 40-41. 
Type-species: Cardiocondyla (Prosopidris) sima Wheeler, Ibid: 42-43. 
Wheeler’s subgenus Prosopidris is here raised to full generic status. 
This change of rank is based on the distinctive clypeus, the 11- 
segmented antennae, and the high mesosoma, which readily distinguish 
Prosopidris from Cardiocondyla , though the two genera are obviously 
closely related. 
Wheeler’s (1935) subgeneric diagnosis requires some modification 
in light of the new species, Prosopidris papuana, described below. In 
the workers the mesometanotal impression is lacking or very feeble. 
In the female wing venation the stub of vein Rs, extending beyond the 
cubital cell, may or may not be present. The only known male of the 
genus is described below. 
