Genus Ocyptamus Macquart, 1834 stat. rev.

Figs 45, 47–50.

Ocyptamus Macquart, 1834: 554, as a genus. Type species: Ocyptamus fascipennis Macquart, 1834 (subsequent designation by Coquillett (1910: 577); jun. syn. of Baccha fuscipennis Say, 1823).

Cryptamus Stahl, 1882: 97. Misspelling.

Baccha (Ocyptamus) . Hull (1949a).

Baccha funebris species group. Hull (1949a).

Ocyptamus cylindricus species group. Thompson (1981), Mengual et al. (2012), Miranda et al. (2016).

Diagnosis. Pedicel with medial acute extension over the basoflagellomere. Parallel-sided elongated or slightly oval abdomen.

Biology. The known larvae of the species within this group feed only on aphids ( Hemiptera: Aphididae) (see Rojo et al. 2003).

Comments. Dark flies with usually dark wings, Ocyptamus sensu stricto is readily distinguished by the medial extension of the pedicel, more distinct on the female, and with a distinct anterior row of long pile on the scutum forming the mesonotal collar. For a long time, it held all ‘ Baccha ’ species described in the New World.

Species list (19): O. antiphates (Walker, 1849), O. calla (Curran, 1941), O. cylindricus (Fabricius, 1781), O. dimidiatus (Fabricius, 1781), O. fasciatus (Röder, 1885), O. funebris Macquart, 1834, O. fuscipennis (Say, 1823), O. gastrostactus (Wiedemann, 1830), O. icarus Reemer, 2010, O. inca (Curran, 1939), O. infuscatus (Bigot, 1884a), O. iris Austen, 1893, O. medina (Telford, 1973), O. megafemur Thompson sp. nov., O. papilionarius (Hull, 1943b), O. princeps (Hull, 1944b), O. stolo (Walker, 1852), O. tarsalis (Walker, 1836), O. urania (Hull, 1949a) .