MANN: THE ANTS OF BRAZIL. 405 
10. Ectatomma (Ectatomma) quadridens (Fabricius). 
Plate 7, fig. 54. 
This species was very common at Independencia, Ceard-Mirim, 
Parad, Itacoatiara, and Manaos. In a nest excavated at the first 
named locality, the brood chambers were about two and a half feet 
beneath the surface, in very hard dry earth. Although E. quadridens 
is very common in collections, the male appears to be undescribed. 
Male. Length 10 mm. 
Head, excluding mandibles, as broad as long, with rounded occipital 
border. Cheeks two thirds as long aseye. Mandibles well developed, 
shaped like those of the worker, but smaller. Eyes and ocelli large and 
convex. Antennae slender, the scape thick and short, about half as 
long as eye; first joint of the funiculus one third as long as the scape, 
joints 3-12 cylindrical, four to five times as long as broad; apical joint 
one and a third times the length of penultimate. Pro- and mesothorax 
rounded above and at sides. Epinotum rounded; the declivous sur- 
face broad and flat, feebly marginate at base, with small lamellate 
tubercles. Node rounded, transverse, its height about equal to its 
length; anterior surface flat; with a tubercle anteroventrally. 
Head and thorax opaque, rugulosely striate. Mandibles coarsely 
striate. Antennae finely punctate. Node and first two segments of 
gaster subopaque, the latter densely striolate longitudinally. 
First four joints of antennae sparsely, the rest thickly pubescent, 
with a few short, erect hairs. Head and thorax with pubescence and 
a few erect hairs. Node devoid of pubescence, but pilose. Gaster 
sparsely pubescent and abundantly pilose. Legs finely pilose. 
Color black; genitalia brown. Wings (length 6.5 mm.) infuscated; 
veins and stigma fuscous. 
The larva is shown Plate 7, fig. 54. 
11. Ectatomma (Ectatomma) ruidum (Roger). 
Less abundant than the preceding species. Found at Ceara- 
Mirim, Manaos, and Camps 39 and 41 Madeira-Mamoré RR. 8. 
12. Ectatomma (Ectatomma) tuberculatum (Olivier). 
Common at Para, Itacoatiara, Manaos, and along the Rio Madeira. 
8 9. 
