31. Atta crudelis. B.M.

Female. Length 6 lines. - Ferruginous, with the apex of the abdomen more or less fuscous. Head very large, much wider than the thorax, longitudinally striated, the striae diverging late- rally on the vertex; mandibles very stout, strongly striated, and armed with a number of stout acute teeth; the anterior margin of the face, the mandibles beneath, and the cheeks, fringed with long pale yellow hairs. Thorax subglobose; the disk and the scutellum longitudinally striated, the metathorax transversely so; the wings subhyaline, the nervures testaceous, the stigma fus- cous, the legs with glittering pale pubescence. The first node of the peduncle oblong and transversely striated, the second subglobose, and also striated transversely; the apical margins of the segments of the abdomen fringed with long glittering white hairs.

Worker major. Rather smaller than the female, the head larger, and the thorax elongate, slightly narrowed behind, but the head, thorax, and nodes of the peduncle similarly striated; the mandibles shorter, stouter, black, and without teeth; the cheeks have similar fringes of long hair, and the insect is sprinkled over with short glittering pale hairs, like the female.

Hab. Georgia.