1976] Kugler — Platythrea 217 
Figs. 1-3. Platythyrea prizo n. sp., worker. Fig. 1, head and right antenna in 
full-face dorsal view. Fig. 2, petiole and adjacent structures, side view. Fig. 3, same, 
dorsal view. 
the articulation anteroventrad to the outer border. Palpal formula 
4,4; all palpi short and slender, do not reach posteromedial rim of 
buccal cavity. Head (fig. 1) moderately long, sides gently convex, 
parallel. Posterior border of head weakly convex in full face dorsal 
view. The frontal lobes are approximated, their fused carinae 
trailing caudad as a prominent rounded ridge that blends into 
the curvature of the mid-vertex. Frontal triangle reduced to clearly 
defined narrow cuneiform depression surrounded by frontal lobes. 
Frontal sulcus, a fine impressed line anteriad but effaced caudad, 
continues to within 0.30 mm of back of head. Middle of clypeus 
broadly swollen; free clypeal margin arcuate with a narrow apron. 
Posterior clypeal border separated from frontal lobes by distinct 
V-shaped sulcus. Eyes suboval, only slightly convex; on dorso- 
lateral surface of head slightly anterior to midlength (anterior 
edge of eye 0.30 mm from mandibular insertion). Eye covered 
with extremely fine short erect pubescence. 
Antennae long and slender. In full face view scape extends 
beyond occiput by 0.30 mm, when held straight back. Length of 
first 3 funicular segments 0.34, 0.43, 0.30 mm. Segments 2-10 regu- 
larly decrease in length to 0.20 mm. Apical segment flattened, 
narrowly rounded, length 0.40 mm. Funicular segments vary little 
in width; all about 0.16 mm. 
