MANN: THE ANTS OF BRAZIL. 405 



10. Edatomma {Edatomma) quadridens (Fabricius). 



Plate 7, fig. 54. 



This species was very common at Independencia, Ceara-Mirim, 

 Para, 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 as eye. 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. 



IL Edatomma {Edatomma) ruidum (Roger). 



Less abundant than the preceding species. Found at Ceara- 

 Mirim, Manaos, and Camps 39 and 41 Madeira-Mamore RR. ^ . 



12. Edatomma {Edatomma) tuberculatum (Olivier). 



Common at Para, Itacoatiara, Manaos, and along the Rio Madeira. 



S 9. 



