266 
Psyche 
[September 
0.20 mm 
Figures 5-6, Apomyrma stygia sp. n., small form, heads in dorsal view, 
pilosity omitted. Fig. 5, worker. Fig. 6, queen. 
min, HL 0.62-0.65 mm, HW 0.47-0.50 mm (Cl 76-77), scape 
L 0.29-0.30 mm, hind femur L 0.35-0.36 mm, WL 0.91-0.96 mm, 
petiole L 0.38-0.41 mm, petiolar node L 0.27-0.29 mm, petiolar 
node W 0.30-0.32 mm, postpetiole L 0.25 mm, postpetiole W 0.42 
mm. 
Distinctly more robust than small form; head, truncus, petiolar 
node, postpetiole and rest of gaster all relatively wider. Color darker, 
medium ferruginous. Punctures on head a little more numerous and 
much more distinct, at least in part because of the darker ground 
color. Otherwise, the large form is very similar to the small form, 
and probably is no more than a size variant of the same species show- 
ing slight allometric tendencies. 
Queen, alate small form (holotype), from nest of 17 June, 1968 — 
TL 3.0 mm, HL 0.57 mm, HW 0.43 mm, (Cl 75), scape L 0.26 
mm, hind femur L 0.32 mm, forewing L 1.95 mm, WL 0.95 mm, 
petiolar node L 0.27 mm, petiolar node W 0.30 mm, postpetiolar 
node L 0.19 mm, postpetiolar node W 0.26 mm, greatest diameter 
of compound eye 0.11 mm. 
Queen, dealate small form, from nest AA 318 Ni — TL 2.7 
mm, HL 0.54 mm, LIW 0.41 mm (Cl 76), scape L 0.24 mm, hind 
