3. Crematogaster castaneus ^HNS. Pl. IX. fig. 2. B.M.

Worker. Length 2 lines.-Head and thorax rufo-ferruginous; abdomen brownish-black, with the base obscure rufo-fuscous. The head, seen above, rotundate, scarcely shining; the thorax deeply constricted at the base of the metathorax, which is armed with two diverging acute spines; the legs ferruginous, the tibi and tarsi darkest. Abdomen: the first node of the petiole, viewed in front, heart-shaped, the pointed end upwards; the second node globose, with a deep longitudinal incision above.

Female. Length 4 lines.-Rufo-ferruginous, smooth and shining: the thorax with a central and two lateral longitudinal rufo-fuscous stripes, the metathorax not spined; wings hyaline, the nervures testaceous. Abdomen oblong, the apical margins of the segments fuscous, and slightly depressed and thinly sprinkled with short cinereous pubescence.

Hab. Albania.