132 
William Morton Wheeler 
its median transverse diameter. Ocelli present, small flattened. Man- 
dibles rather small, triangulär, with about 7 small, subequal teeth on 
the straight apical borders. Maxillary palpi rather long, 6-jointed ; 
labial palpi short, 4-jointed. Clypeus rather large, ecarinate, its sur- 
face flush with that of the head and eyes, its anterior border entire, 
not projecting. Frontal area triangulär; frontal groove distinct only 
in front, obsolete behind. Frontal carinae very short and low, rather 
straight, rapidly diverging behind. Antennal insertions just behind 
the posterior border of the clypeus which does not project back 
between them. Antennal and clypeal fovese very feebly developed, 
apparently confluent. Antennse slender, 12-jointed; funicular joints 
all longer than broad, not incrassated nor forming a club towards 
the tip of the appendage. Thorax short, thickset, with distinct pro- 
mesonotal and mesoepinotal sutures and distinctly constricted at the 
latter, broadest through the pronotum which with the mesonotum 
forms a single hemispherical mass, and surrounds and encloses the 
semicircular mesonotum in front and on the sides. Epinotum smaller 
and lower, as broad as long, moderately convex, bat without distinct 
base and declivity. Petiole surmounted by a low, blunt, transverse 
scale. Graster rather large, elliptical. Legs rather stout, their tibise 
with simple claws, their middle and hind tibise with simple, non- 
pectinated spurs. 
Glaphyromyrmex oligocenicus, sp. nov. 
Worker (Fig. 63.) Length about 5 mm. 
Head very regularly elliptical, a little longer than broad. An- 
tennal scapes straight, scarcely thicker at the tips than at their bases, 
reaching a little beyond the posterior border of the head; joints 1 — 6 
of the funiculi fully twice as long as broad; joints 8—10 only l*/ 2 
times as long as broad. Petiole from above transversely elliptical, 
somewhat more than twice as broad as long; in profile the 
node is thick, low and rounded, with the posterior surface slightly 
flattened. 
Body shining throughout, mandibles densely and finely striated, 
remainder of body beautifully shagreened, the thorax more sharpty 
and finely than the head and gaster. Clypeus, cheeks and sides of 
pronotum with a few scattered punctures. 
Hairs very sparse, erect, short and stiff, present only on the 
clypeus, tips of antennal scapes, vertex and gaster. Flexor surfaces 
