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 vmder- 

 side of roots, which formed projecting roofs. Along these tunnels 

 were frequent broad and flat chamljcrs, 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 verv 

 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 



