MANN: THE ANTS OF BRAZIL. 409 
at Natal, nesting among scrubby vegetation. The typical D. grandis, 
in the forest, is seen foraging all through the day, but D. mutica, living 
in more open localities, is crepuscular or nocturnal, though it forages 
also on cloudy days. The formicaries were always in thickets, among 
the roots of trees. The mounds thrown up are low, generally not over 
six inches in height, and often up to three feet in diameter. Dr. 
Heath and I dug out one nest. The tunnels extended along the under- 
side of roots, which formed projecting roofs. Along these tunnels 
were frequent broad and flat chambers, which contained the brood. 
In spite of the large size and powerful sting, the ants were not very 
pugnacious, though those in a chamber would sally out when it was 
cut into. 
Dinoponera grandis and its varieties are known to the Brazilians as 
the “'Tocandero,”’ and according to them its sting causes fever. 
A larva (Plate 7, fig. 55) probably immature, in alcohol measures 
13 mm. in length. The body is thick and the neck short. All the 
segments are distinct, with fine, short hairs. The head is glabrous, 
from above a little broader than long; the mandibles long and acumi- 
nate. The thorax and abdomen are tuberculate, the tubercles very 
large and prominent, rounded above, each bearing a small sensory 
papilla at the middle. Each segment has three of these large tubercles 
laterally, and a smaller, less conspicuous one basally. 
22. Dinoponera grandis var. or subsp. 
Male. Length 21 mm. 
Head, including the mandibles, as broad as long, very convex behind. 
Eyes very large and long occupying the entire sides of head, the inner 
border deeply emarginate; ocelli very large and convex. Clypeus 
convex, the anterior border truncate. Mandibles small, pointed at 
apex, with a small tooth at middle of inner border. Antennae a little 
shorter than the body; first funicular joint twice as broad as long; 
joints 2-11 very long, cylindrical, each slightly shorter and more 
slender than the preceding. Thorax robust; scutellum short, tri- 
angular, broadly rounded at apex. Epinotum evenly rounded, with- 
out distinct base or declivity, unarmed. Petiole nearly twice as long 
as broad, narrowed in front, with nearly straight sides; in profile 
longer than high, flattened above, the anterior slope gradual, more 
abruptly sloping behind, the anteroventral surface with a broad, 
triangular projection. Gaster long, and slender, the length three 
