90 
Psyche 
[June 
Maxilla with 5, labium with 3 segments in each palpus. Labrum 
reduced to a small piece shaped like an inverted V. 
Truncus strongly constricted and deeply impressed at metanotal 
groove; pro- and mesonotum fused together; humeral angles dis- 
tinct and often more or less toothlike. Propodeum armed with a 
pair of slender oblique spines; declivity flat or weakly concave, 
smooth, at most feebly carinate on sides; inferior propodeal plates 
small, subacutely angled to rounded ; propodeal spiracles circular, 
situated close under the bases of the spines, directed posterolaterad ; 
atrum of metapleural gland with dark borders visible through in- 
tegument, large, elliptical, oblique. Petiole with a long, slender, 
anteriorly tapered peduncle in front, a distinct, at least discally 
smooth and shining node, and a short posterior peduncle (Figs. 2-4). 
Postpetiole rounded, not very different in width from petiolar node, 
smooth and shining, at least on summit. No spongiform tissues on 
nodes or elsewhere. Gaster broadly oval, smooth and shining. Legs 
long and slender, femora moderately incrassate in apical half; no 
spurs on middle and posterior tibiae; claws slender, simple. Sting 
slender, rigid, with very acute tip; exsertile, functional. 
Sculpture ranging from almost entirely smooth and shining 
( teledectus ) to rugulose and opaque over dorsum of head and truncus 
( rudis ), with at least some coarse but shallow, round tuberculate 
fossae on the head, and often a few on promesonotum as well. The 
tubercles of these fossae often each bear a single, short, slender, 
curved or reclinate clavate hair, these clavate hairs also more or less 
generally distributed over scapes, mandibles, femora and tibiae, 
promesonotum, propodeal spines, posterodorsal faces of both nodes, 
and sometimes underside of head. Short fine erect or reclinate hairs 
on mandibular apices, funiculi of antennae, tarsi and gastric apex; 
gastric dorsum also with very sparse, fine, short appressed hairs. 
Color prevailingly ferruginous. 
Queen: Similar to worker in size and proportions, but with 3 
ocelli, larger compound eyes, and the usual differences due to the 
prenuptial presence of well-developed wings and thoracic flight 
sclerites. Scutellum prominent and convex, propodeal spines well- 
developed and acute, but stouter than in worker. 
Male (known only for A. rudis , Figs. 5-10) : Habitus dacetine, 
but slender ; node long and low ; sculpture mostly smooth and shining 
with fine punctures. Mandibles reduced to minute rounded lobes, 
each with a single acute tooth; separated by labrum, which is larger 
than mandibles and has a lobe at each free corner, just above the 
