Lewis & Short

mellārĭus, a, um, adj. [mel], of or belonging to honey, honey- (post-Aug.): vasa mellaria, Plin. 21, 14, 49, § 82.
Hence, subst.

    1. 1. mellārĭus, ii, m., a bee-keeper, beemaster (ante-class.), Varr. R. R. 3, 16, 17.
    2. 2. mellārium, ii, n., a beehive, apiary, Varr. R. R. 3, 16, 12.