262 
Psyche 
[December 
Worker: With the general characters of tribe Ponerini. Mandibles 
with the two apical teeth acute and forming a pair; followed basad 
by a short series of smaller teeth, by a single small tooth, or by a 
large diastema with or without one or more irregular indistinct den- 
ticles ; a large acute or truncate tooth marks the basal angle. Antennae 
12-segmented, second funicular segment small, no distinct club. Palpi 
segmented 2, 2 or 2, 3. Frontal lobes forming a raised platform, 
large and prominent, median part of clypeus falling sharply anteriad, 
sub-perpendicular to frontal region. Anteromedian clypeal margin 
projecting in a triangular point that in some species is produced as a 
slender, flattened spine or tooth. Eyes much reduced, condensed 
into a single, more or less convex facet, situated in front of the mid- 
dle of the sides of the head, but not very close to the anterior corners. 
Promesonotal suture distinct and separating the segments; metanotal 
groove often indistinct, but more or less impressed. Petiole with 
steep anterior and posterior faces, apex weakly to strongly rounded, 
the node usually broader than long as seen from above; subpetiolar 
process thick and more or less triangular. Gaster with constriction 
behind postpetiolar segment weak to obsolescent. Sting well devel- 
oped. Tibiae each with a single pectinate spur. Malpighian tubules 
4 (checked only in oculata ) . 
Queen (known only for 2 species: pergandei and oculata ) : dich- 
thadiiform, i.e., with broad, subquadrate head: eyes reduced, flat- 
tened, but little larger than those of worker. Ocelli absent, or only 
the anterior ocellus present. Antennae shorter than in worker, both 
scape and funicular segments. Mandibles simple, acutely falcate. 
Thorax reduced, permanently wingless. Mesonotum with scutum 
and scutellum distinct and convex, or the latter reduced and fused 
with propodeum (?). Petiole transverse, broader than alitrunk, 
divided by a median sulcus. Gaster wide, with constriction after 
postpetiole poorly-marked or lacking; sting present and extrusible. 
Legs long; femora flattened; tibiae each with a single pectinate spur. 
Sculpture weaker than in corresponding worker, more shining. 
Male unknown. 
Larva: (onlv small larvae of S. pergandei and small and medium 
sizes of S. oculata are known; see Fig. 1.) Head small, longer than 
broad, hemicephalic; with simple, curved acute mandibles, their 
apices directed ventrad, so that they apparently work much as do 
the mouth-hooks of higher dipterous larvae. Antennae small, situated 
far back on cephalic dorsum. Pronotum elongate, tapering anteriorly, 
partly retractile, its neck-like structure most noticeable in the smaller 
larvae. The very smallest larvae seen (of oculata ) are about 0.6 mm 
long by 0.3 mm wide, with head capsule about O.n mm wide. They 
