74 
Psyche 
[June 
with small but acute genal teeth. Frontal lobes approximate, separated 
only by a narrow linear groove. Anterior clypeal apron gently convex 
in outline, with 5 large truncate teeth, of which the middle tooth is 
much the largest, being composed of two median teeth completely fused 
to about their apices, and projecting nearly twice as far as the smaller 
teeth close on each side of them; corner (lateral clypeal) teeth still 
shorter, each composed of a mesal and a smaller lateral element which 
are fused at the base. Mandibles rather slender, their external margins 
feebly convex (almost straight along basal 2/3), inner margins convex 
except for apical quarter, each bearing 7 teeth : a triangular basal tooth, 
followed by a spaced series of 5 acute, slightly recurved teeth, of which 
each of the distal 3 or 4 has a shorter dorsal spur (difficult to see in 
normal full-face view) representing the vestigial twin of a pair com- 
mon in species of this group ; an indistinct reclinate tooth lies near the 
narrow mandibular apex. The mandibles when closed cross each other, 
but leave a fairly large triangular space between themselves and the 
clypeal margin. Antennal scapes short and rather broad (thinnest near 
their midlength) , feebly sigmoidal, reaching back to about the posterior 
fifth of the head length. Funiculus 1 1 -segmented, conspicuously 
enlarged apicad, but gradually so, without a definite number of 
segments in the club ; all segments except first and apical broader than 
long. No eyes detected. 
Alitrunk feebly convex in profile; as seen from above, broadest 
across the middle pronotum; promesonotal suture apparently flexible 
and accompanied by a strong groove along the anterior mesonotal 
border, at alitruncal midlength. Mesonotum transverse, forming 
narrowest point of alitrunk; metanotal groove distinct but shallow; 
propodeal dorsum broader than long, its sides diverging posteriad ; 
declivity plane, rounding into dorsum, much broader than high. 
Inferior borders of pronotum broadly rounded. 
Petiolar node sessile, with vertical anterior and horizontal dorsal 
faces both convex, the dorsal face broader than long as seen from 
above. Ventral process of petiole a rounded, forward-thrust lobe with 
a conspicuous oval thinned area or fenestra. Postpetiole broader than 
petiole, but shorter, and also shorter than the succeeding segment, 
which is the widest. Gastric apex not laterally compressed ; sting stout. 
Legs robust; femora flattened and incrassate; tibial spur vestigial on 
middle legs, but on each hind tibia there is a short but very thick, 
curved, pectinate tibial spur and an adjacent, much smaller, straight, 
slender spur. 
Head densely reticulate-punctulate and opaque. Antennal scapes, 
