140. Formica nana ^HNS.

Worker. Length 2 1/2 lines.-Black: the mandibles and antenna ferruginous, the abdomen covered with golden pubescence. Head: the anterior margin of the clypeus and the sides of the head anteriorly, ferraginous; the clypeus with a central longitudinal carina, the head thinly covered with golden pubescence.

Thorax rounded in front and narrowed posteriorly; the apical joints of the tarsi ferruginous, covered thinly with golden pubescence. Abdomen subovate, covered with short golden pubescence, and thinly sprinkled with long golden-coloured hairs; the node of the peduncle incrassate, narrow, oblong-quadrate, with the margin above rounded.

Hab. Brazil. (Coll. D. Swainson, Esq.)