MANN: THE ANTS OF BRAZIL. 457 
with an elongate black spot between branches of cubital vein. Rest 
as in the worker. 
Male. Length 5 mm. 
Head, excluding mandibles about one and one third times as long 
as broad, rounded at sides, behind more suddenly constricted than in 
the worker and female. Eyes and ocelli large, very convex. First 
joint of funiculus one third as long as second; second joint one and 
one fourth times as long as third; joints 3-11 subequal, two and one 
half times as long as broad. Prothorax in front constricted; seen in 
profile depressed; broadly margined. Mesothorax rounded, without 
longitudinal ridges. Scutellum with broad, flat teeth, as in female. 
Epinotum, petiole, postpetiole, and gaster similar to these parts in the 
female. 
Pilosity abundant, black, suberect on the head and body, more 
depressed on the legs. 
Wings. Length 4 mm.; fuscous, clouded with darker spots. 
Color as in worker and female. 
Described from specimens taken from two colonies at Abund and 
Madeira-Mamoré R. R. Camp 39. Apterostigma branneri approaches 
most closely A. calverti Wheeler from Costa Rica, but A. branneri 
has the head distinctly longer, the pronotum less declivous in front, 
and without the deep impression posterior to the margin, and it lacks. 
the distinct ridge on the propleurae; the angle between the base and 
declivity of the epinotum is much more obtuse. Seen in profile, the 
slope of the epinotal declivity is more gradual. The size of the worker 
of A. calverti is smaller (3.5-4 mm.). 
150. Myrmicocrypta foreli, sp. nov. 
Plate 4, fig. 32-34. 
Worker. Length 3.25 mm. 
Head, excluding mandibles, about one fourth longer than broad, a 
little longer behind than in front, with slightly convex sides and 
concave occipital border, the occipital corners drawn out into thick 
blunt spines. Front broad and flat. Clypeus with broadly rounded 
anterior border. Frontal carinae somewhat elevated at base of 
antennal scape, anteriorly extending outward, almost attaining outer 
corners of the clypeus; posteriorly very slightly diverging towards 
occipital border, becoming much weaker at a little less than half the 
distance from base of scape to occiput. Antennal scapes curved, 
