402 Bulletin. American Museum of Natural History. [Vol. XXXIV, 
very short and robust, narrower through the prominent but rounded humeral angles 
than half the head; pronotal surface in profile slightly convex, sloping anteriorly; 
mesonotum straight and sloping backward, with a distinct but blunt torus near its 
posterior margin; epinotum as broad as long; base and declivity in profile subequal, 
the latter sloping; spines stout, blunt, half as long as the base and half as long as 
their distance apart at the base, directed upward and slightly outward and backward. 
Petiole from above with very short peduncle, 14 times as long as broad, somewhat 
broader behind through the node, which is transverse, with long, concave anterior 
and short, abrupt posterior declivity, the border rather sharp and distinctly excised 
in the middle. Postpetiole more than twice as broad as the petiole and nearly, 3 
times as broad as long, its sides produced as blunt points with convex anterior and 
concave posterior borders. Gaster much smaller than the head, broadly elliptical 
and somewhat flattened. Legs long, with moderately thickened femora. 
Shining; mandibles with a few coarse punctures near the apical borders and . 
smaller, scattered punctures on the remaining surface. Clypeus longitudinally 
rugulose even in the middle. Anterior 2 of head with rather sharp, fine longitudinal 
rug, those on the front diverging; posterior third smooth, with much scattered, 
coarse and rather elongated punctures. Pro- and mesonotum transversely, meso- 
pleure and sides of epinotum longitudinally rugulose; concave declivity of epinotum 
between the spines indistinctly and finely transversely rugulose. Petiole and post- 
petiole slightly opaque, upper surface of latter with a row of large, elongate, piligerous 
punctures. Gaster shining, minutely shagreened and with scattered piligerous 
punctures. : 
Hairs yellow, rather coarse, suberect, of unequal length, moderately abundant, 
scarcely longer on the gaster than on the head; shorter and somewhat more oblique 
on the legs and antennal scapes. 
Head yellowish red; mandibles dark red, their borders and the sides and anterior 
border of the clypeus blackish; thorax and pedicel brown, the postpetiole darker; 
gaster black, with brown posterior borders to the segments; legs brownish yellow; 
antennz scarcely paler than the head. 
Worker. Length: 1.5 mm. 
Head a little longer than broad, subrectangular, with feebly convex sides and 
straight posterior border, feebly notched in the middle. Anterior border of clypeus 
entire, broadly rounded. Antennal scapes reaching a little beyond the posterior 
corners of the head. Thorax broad through the pronotum, with rather prominent 
humeri; pro- and mesonotum in profile convex and rounded above, the latter without 
a torus; epimotal base longer than the declivity; spines small, slender, erect and . 
rather blunt at their tips. Petiole nearly three times as long as broad, with concave 
sides, its node narrow, with blunt, entire upper margin. Postpetiole less than twice 
as broad as the petiole, nearly as long as broad, convex above, with feebly angular 
sides. Gaster somewhat smaller than the head. 
Mandibles, head, thorax and pedicel subopaque; gaster shining; mandibles 
striatopunctate; clypeus and head longitudinally rugulose, the latter with finely 
punctate interrugal spaces; thorax and pedicel finely and densely punctate; prono- 
tum above vermiculately or reticulately rugulose-punctate. 
Hairs whitish, sparse and erect on the body, much shorter and more appressed. 
on the appendages. 
Brown, with slightly paler appendages; gaster black, with brown posterior 
margins to the segments. 
