MANN: THE ANTS OF BRAZIL. 485 
border truncate. Mandibles with six teeth. Eyes small, situated 
posterior to middle of sides of head. Ocelli small. Frontal lamellae 
elevated; enclosed area very slightly impressed at middle. Antennae 
about two thirds as long as body... Pronotum narrow, anterior border 
with raised margin which extends part way along the sides. Mesono- 
tum much elevated, declivous in front, flattened above, with faint 
indications of margin at sides. Epinotum rounded above and at 
sides, margined at base. Node as in worker. Gaster ovate. Legs 
long and slender. 
Head, thorax, epinotum, and node subopaque, densely, finely 
punctate, minutely striolate transversely, with very sparse pubescence, 
but with abundant, semierect pile. 
Gaster subopaque, densely punctate and striolate, both punctures 
and striae being extremely minute. The pubescence is very sparse 
and fine; the pile erect, not abundant. 
Scape of antennae and legs with many erect hairs; funiculi pubes- 
cent. 
Color as in worker. 
Described from several workers and a female taken at Tumatumari, 
British Guiana (Amer. Mus. Nat. Hist. collection). 
220. Dendromyrmex chartifex subsp. mamoreénsis, subsp. nov. 
Worker. Body much more robust than in the typical form of the 
species. Head constricted behind the eyes, sides convex, occipital 
' border with edge rounded, without trace of margination. Sides of 
head in front of eyes evenly convex, narrowed toward base of clypeus. 
Clypeus strongly carmate. Mandibles with six teeth on the blade. 
Surface of frontal area convex, longitudinally carinate at middle. 
Antennae nearly as long as body, rather thick. Pronotum nearly as 
broad as long, depressed, and broadly margined anteriorly; seen in 
profile, the surface is convex; sides distinctly margined for three 
fourths the distance to promesonotal suture. Mesonotum slightly 
convex above, rounded at sides. Epinotum flattened, sides marginate. 
_ Petiolar node, seen in profile on anterior side straight and perpendicu- 
lar at base, then sloping to apex, with an acute angle between the 
two surfaces; posterior surface convex; from behind, evenly rounded 
above. Gaster ovate, short and thick. Legs long and slender. 
Body nearly opaque, gaster subshining; antennae and legs sub- 
lucid. 
