486 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
Head, thorax, and abdomen finely, densely punctate and striolate, 
with abundant closely appressed pubescence, which gives the insect 
a velvety appearance. Body everywhere, except on funiculus, with 
numerous erect or suberect hairs. 
Color dark ferruginous, legs lighter. Pile and pubescence gray. 
Camp 39 Madeira-Mamoré R. R. 
This subspecies differs from typical D. chartifex in its more robust 
form, proportionately larger head and the opaque or semiopaque 
structure of the integument. In a series of D. chartifex from Bon 
Lugar on the Rio Purus (Coll. Goeldi, det. Forel) before me, the whole 
body is much more shining than in D. mamoreénsis, and the pubes- 
cence much more sparse. The head is proportionally smaller, and 
the occipital margin is distinctly, though narrowly, margined. 
221. Dendromyrmex madeirensis, sp. nov. 
Worker. Close to D. apicalis. 
Head with sides in front of eyes evenly convex, considerably nar- 
rower at base of clypeus than in front of eyes; sides of occiput convex; 
occipital border narrowly, but distinctly margined; the sides, seen 
from above, angulate. Eye situated distinctly behind middle of 
head. Frontal area broad, convex, faintly longitudinally impressed 
at middle. Clypeus strongly carinate; the anterior border slightly 
concave; mandibles with six teeth. Antennae long and slender. 
Pronotum longer than broad, sides submarginate; strongly impressed 
and margined at anterior border. Surface, except for anterior de- 
pression, slightly convex. Mesonotum rounded above and at sides. 
Epinotum seen in profile, convex from apex to base; sides weakly 
margined, surface flat. Apex of node, seen in profile acutely angulate, 
from behind truncate, the sides near apical margin nearly straight, 
forming an angle with the apical margin. Gaster ovate. Legs long 
and slender. 
Head shining, finely striolate and punctate, with rather sparse 
pubescence and abundant semierect pile. Scape of antennae shining, 
coarsely punctate, without pubescence, but with much long erect 
pile; funiculus thickly pubescent, with short pile. Pronotum shining, 
sparsely punctate, with sparse, long, recumbent and a few erect hairs. 
Mesonotum more densely punctate and more thickly pubescent than 
the pronotum. Epinotum and petiole semilucid, finely striate trans- 
versely, the former with very sparse pubescence and a few long, erect 
