The following description is offered of an insect to which I shall have occasion to allude in a forthcoming Bulletin, wherein such descriptive matter would be inappropriate.

Hadronotus mesillæ, n. sp.—♂. Length slightly over 1 mm.; black; coxæ black, legs otherwise rufous. Antennæ dark rufous, arising just above mouth, delicately pubescent; pedicel oval, shining, punctured, conspicuously shorter than the long first flagellar joint; second flagellar joint shorter than the tirst, but fully twice as long as broad; third to fifth joints oval, shorter than the second, the third slightly longer than the following, all longer than broad.