112 
Psyche 
[September 
apical tooth slender, spiniform, extremely feebly curved, 
about as long as the ventral apical tooth, situated at or very 
near the apical quarter of the mandibular length; distant 
from the dorsal apical tooth by approximately its own 
length. Inner mandibular borders at midlength each with a 
small, very low, translucent, sublamelliform process or 
welt, rising gradually basad and continuing apicad only a 
short distance before terminating suddenly in more or less 
of an angle. This short ledge or welt is inconspicuous, and 
is best seen in silhouette by light reflected from a white 
surface held below the mandibles. 
Alitrunk slender, formed much as in members of the 
szalayi group, with the promesonotum a bit more gently 
and evenly rounded above, but the mesonotum concave be- 
hind and the propodeal dorsum very feebly convex, yielding 
the same “sway-back” appearance. Propodeal declivity gent- 
ly concave, the teeth reduced to minute, subacute tubercles 
or angles, chiefly responsible for the angularity of the propo- 
deum seen from the side. Infradental lamellae completely 
obsolete. Petiole subclavate, node longer than broad, very 
low and gently rounded above, not very distinctly differen- 
tiated from, and slightly longer than, its anteriorly tapered 
peduncle. Spongiform posterior collar narrow, with small 
lateral lobes extending a short distance anteriorly along the 
sides of the node; midventral strip well developed. Post- 
petiole subquadratic seen from above, nearly as long as 
broad (w 0.15) and a little broader than the petiolar node; 
with well developed, areolate spongiform masses. 
Gaster with a narrow transverse dorsal spongiform bor- 
der. Basal costulae fanning from bilateral origins, on the 
sides extending up to 1/3 the length of the basal tergite; 
almost completely effaced in the middle, and much shorter. 
Remainder of gaster smooth and shining, as are also the 
postpetiole, propodeum, sides of alitrunk, posterior dorsum 
of petiolar node, fore coxae, clypeus and mandibles. Head 
and legs otherwise densely punctulate and opaque. Dorsum 
of pro- and mesonotum weakly punctulate, subopaque to 
feebly shining. 
Dorsum of head with a scanty growth of very fine incon- 
spicuous reclinate hairs and about 12 moderately long, fine 
