176 
Psyche 
[June-September 
neck and declivous propodeal face (fig. 7). Propodeal spiracle not 
prominent; orifice oval, facing caudad. Superior propodeal spines 
longer, spiniform; their bases narrowly separated. Inferior pro- 
podeal plates short, spiniform. Petiole (figs. 7, 8) low, narrow; 
anterior peduncle very slender in dorsal view, dorsoventrally cunei- 
form; no posterior peduncle; venter with 2 longitudinal ridges. 
Anterior ridge of petiolar node drawn out into an acute, dorso- 
ventrally flattened, somewhat upturned tooth; sides of node seen 
from above parallel, flat in anterior half, weakly convex in posterior 
half. Postpetiole smaller than in female, especially in width and 
height; more conical in dorsal view. Gaster much smaller in all 
dimensions. Legs longer, more slender; middle and hind tibial spurs 
finely pectinate. Sculpture on dorsum of trunk not broken by 
sutures; transverse striae on anterior pronotum become longitudinal 
on mesonotum, then transverse again on propodeum. Striation on 
first tergum of gaster fades at about midlength; much of caudal half 
smooth and shining. Color uniformly dull black in mature workers; 
callows dark ferruginous brown. Petiole, postpetiole and gaster less 
densely hairy than in female; color of erect hairs can vary from 
black to golden on any one individual. 
The sting apparatus of the worker is most like those of P. 
( Ephebomyrmex ) naegeli and P. ( E .) imberbiculus (Kugler, 1978): 
anterior apodeme of spiracular plate wide and of uniform width 
along entire length of plate; lancets with 2 distinct barbs and no 
dorsal ridge; triangular plate without dorsal and medial tubercles; 
other parts as shown in Kugler (1978) figs. 1.8, 19, 21, 22, and 26. 
Male 
(Fig. 5) 
Measurements (ranges from 5 individuals, including the largest 
and smallest available from 7 collections) TL 7.29-8.10; HL 1.56- 
1.74; HW just behind eyes 1.10-1.25 (Cl 70-73); eye L 0.31-0.34; 
scape L 0.34-0.42; combined L of 2nd and 3rd flagellar segments 
0.81-0.90; ML 0.12-0.19; WL 2.17-2.40; front wing L 4.00-4.10; 
hind femur L 1.86-2.00; petiole L 0.80-0.94; postpetiole L 0.72- 
0.93; gaster L 1.74-2.10. 
Head remarkably elongate and flattened behind (fig. 5). Clypeus 
rather long, broadly convex in both dimensions, middle subsiding 
evenly to sides; free margin broadly arcuate except for slight median 
