1976] 
Kugler — Platythrea 
219 
Petiolar node as in Figs. 2 and 3. Seen from the side, the anterior 
and posterior surfaces are subparallel, anterior surface shorter, 
curving broadly into dorsal surface. Dorsal profile gently convex; 
posterodorsal corner distinct, narrowly rounded, unarmed. Pos- 
terior outline in perfect profile gently convex, but face slightly 
concave. In dorsal view, node distinctly longer than wide (maxi- 
mum W/ maximum L 0.64). Base of node at anterior end square 
and narrower (0.50 mm); sides weakly convex and diverging slightly 
to 64% of length, then curving mesad. Viewed from the front, sides 
of node convex, widest at midheight, smoothly joining convex dorsal 
surface except near posterior edge, where juncture is slightly angular. 
Dorsum of postpetiole wider than long (L 0.90 mm, W 1.12 mm), 
evenly rounded anteriad in both directions (figs. 2 and 3). Acro- 
tergite of second gastric segment with narrowly triangular stridu- 
latory file. Sternum of postpetiole truncate in front, underhanging 
insertion. Tergum of second gastric segment longer than broad 
(L from apex of file 1.30 mm, W 1.15 mm), and much longer than 
sternum (L excluding acrosternite 0.40 mm). Gaster bent strongly 
ventrad at this segment. Gaster markedly constricted in both views 
between postpetiole and second segment. Pygidium very convex 
dorsad and caudad, apex of ventral edge subacute. Sting well 
developed. 
The whole body has the usual pruinosity, and dense, finely 
reticulate-punctate ground sculpture. Superimposed larger punc- 
tures are scattered over most of the head, trunk, petiole, and first 
2 gastric segments; they are coarser on the petiole, anterior ends 
of meso- and metapleura, and posterodorsal corners of propodeum. 
These superimposed punctures are smaller and more numerous 
than in most Platythyrea species. Fine transverse rugules present 
on lower half of declivity of propodeum. Erect hairs on masticatory 
borders of mandibles, anterior edge of clypeus, posterior surface 
of first coxae, pygidium, and hypopygium. Very short, sparse, 
fine oblique hairs seen on gaster in some lightings. 
Head, trunk, petiole, and gaster dully shining, uniformly dark 
reddish brown; appearing black to naked eye. Legs, antennae and 
mandibles lighter, castaneous brown. Appendages get lighter and 
yellower more distad so that terminal tarsomeres and antennomeres 
are bright yellow gold. Frontal lobes rimmed with black, and frontal 
depression darker than surrounding frontal lobes. 
