1. Macromeris iridipennis ^HNS.

M. caeruleo-nigra; abdomine iridescente, alis caeruleo-violaceoque splendide micantibus; pedibus mutieis, simplicibus.

Female. Length 12 lines. Blue-black; abdomen with a changeable iridescent pile; head and thorax with a black velvety pubescence; the metathorax very finely rugose and opake; the legs simple; the posterior tibiae villose within; the wings very dark brown, with a splendid violet and blue iridescence.

Male. Very closely resembling the female, but rather smaller; the anterior and intermediate femora more incrassate, and all the femora with a simple row of teeth or serrations on their inferior margins.

Hab. Aru.

Although this species of Macromeris ^HNS is very similar in colour to the M. violacea ^HNS of St. - Fargeau, the femora are not so thick as in that species, not in fact much more so than in the female; and the row of teeth beneath is a strong specific character.