94 Psyche [Sept.-Dee. 
forms) and the pedicel is as broad as in latinoda. Postpetiole 
and gaster similar to the type. In profile the thorax is strongly 
impressed at the mesepinotal suture; the base and declivity are 
of the same length and form a blunt angle. The petiole has a 
strong antro-ventral tooth and a lamella. Pilosity and pubes- 
cence much less than in the type. The new variety is distinctly 
bicolored. The head is dark reddish brown, the gaster brown, 
except for the first segment which is reddish or reddish yellow, 
as is the rest of the body. The mesonotal disc is brownish. 
Type locality: Kartabo, British Guiana (Wheeler Coll.). 
Cotypes: No. 20648, Museum Comp. Zool. 
Pseudomyrma triplaridis subsp. boxi subsp. nov. 
Worker. 
Length 4 mm. Head 1% times as long as broad, with convex 
sides, well rounded posterior corners and concave occipital edge. 
The mandibles are not darker than the rest of the head, which 
is characteristic of all forms of P. triplaridis. The clypeal lobe 
is long, narrow and straight in front. Head strongly punctate 
and opaque. The scapes reach the middle of the eyes, which 
are slightly larger than 1/3 the sides of the head. Prothorax as 
long as broad, well rounded, not marginate, strongly foveolate. 
The anterior rim of the mesonotal disc is semicircular. Epi- 
notum longer than broad, broader at the level of the stigmata, 
strongly sculptured. Petiolar node shaped as in the subspecies 
biolleyi , with a very broad peduncle. Postpetiole and gaster 
stout, more convex and more robust than in the type. 
Pilosity and pubescence abundant, but less than in the type. 
Color brownish yellow, antennae, gaster and tibiae a shade 
lighter. 
Type locality: Blairmont, Berbice, British Guiana (H. E. 
Box coll.). 
The new subspecies differs from the type and the ss biolleyi 
by its strong sculpture, different color and other characters. 
Described from cotype 23146, Harvard University Collec- 
tion, many workers. 
Pseudomyrma triplaridis subsp. trigona subsp. nov. 
Worker. 
Length 4-4.8 mm. Head subrectangular. 11/3 times as long 
as broad, with weakly convex sides and relatively sharp occipi- 
