33 4 
Psyche 
[December 
border, which is very feebly constricted; no trace of lateral conules. 
Gaster (slightly dented) about 0.64 mm wide near the middle, with 
the usual .subtruncate anterior end ; strongly convex both above and 
below. Legs rather long and slender (longer than in radoszkowskii ) , 
but with moderately incrassate femora and tibiae. 
Dorsum of head (face) densely reticulopunctulate and opaque, ex- 
cept for the shining areas noted above; area between frontal carinae 
and cheeks in front of eyes finely longitudinally costulate (Figs. 1 
and 3). Sides of head behind (below) eyes, and all of ventral sur- 
face of head, smooth and shining. Alitrunk, both waist segments and 
basal 3/5 of first gastric tergite reticulopunctulate and opaque. Most 
of legs, a large spot on each side wall of pronotum, and most of 
gaster smooth and shining. Antennal scapes finely punctulate, weakly 
shining, with some indistinct longitudinal costulae mainly near base. 
Longer erect setae, mostly bilaterally paired, arranged as shown 
in the figures (see especially Fig. 1). Head, mandibles, legs and 
gastric dorsum, especially the smooth surfaces, with sparse, fine, short 
appressed hairs. Scapes, femora, tibiae, coxae and trochanters each 
with 1-3 short, fine oblique standing hairs. 
Color distinctive: body castaneous, including scapes, frontal tri- 
angle and posteromedian lobe of clypeus, margins of mandibles and 
frontal carinae, and the upper 3/4 of the sides of the head, including 
compound eyes (pattern shown in Figs. 1 and 3, especially the 
former) ; alitrunk and scapes darker than the rest, almost piceous. 
Legs and scapes dull brownish yellow. Dorsal surface and lower 
sides of head a contrasting light yellow, along with anterior clypeus 
and most of mandibles. This color pattern resembles at a glance that 
of Pheidole punctatissima, the common epiphyte dweller of Middle 
America. 
Soldier variation: Of the paratypes, 4 soldiers were measured; a 
small specimen from sample M-77 has HL 1.00, HW 0.94 mm 
(Cl 94), while the largest soldier in M-60 measures: TL 3.3, HL 
0.08, HW 1. 01 (Cl 94), WL 0.91. The other soldiers are inter- 
mediate in size (HL), but one from the Igarape Marianil berlesate 
has HL 1.07 by HW 1.02 mm (Cl 95). Soldiers in the paratype 
series vary in depth of coloration, but the general pattern is the same. 
Some examples have an extra pair of erect hairs on the mesonotum. 
Worker (from type nest series) : TL 2.3, HL 0.58, HW 0.46 
(Cl 79), WL 0.75, scape L 0.73, greatest diam. eye 0.12 mm. 
Form, sculpture and pilosity well portrayed in Figs. 2 and 4. Note 
the shape of the back of the head, rather narrowly rounded as seen 
