Key to species of Coelioxoides

[Modified from Roig-Alsina (1990)]

1 Forewing with a hyaline band extending from the apex of marginal cell to at least the apex of second medial cell (Fig. 3A). Females: S6 apex bifid (Fig. 3B). Males: S6 disc covered with pale, subappressed, and plumose hairs................... 2

- Forewing with an elliptical hyaline spot beyond the apex of marginal cell (Fig. 3C). Females: S6 apex cylindrical, subacute (Fig. 3D). Males: S6 disc covered with brownish, subappressed, and plumose hairs................................. 3

2 Gena, lateral margins of scutellum, metanotum, and propodeum (Fig. 4A) with conspicuous patches of pale pubescence. Apical fasciae of metasomal terga with pale, plumose hairs. Second abscissa of M+Cu of hindwing 4–4.5 times as long as cu-v. Females: S5 with a discrete ridge medially, never carinate (Fig. 4B). Males: S4–S5 apical margins slightly concave, with dense fringes of brown, long, curved apically hairs (Fig. 4C) (Brazil)....................... Coelioxoides piscicauda sp. nov.

- Gena, lateral margins of scutellum, metanotum, and propodeum (Fig. 4D) with inconspicuous pale and/or dark brown pubescence. Apical fasciae of metasomal terga indistinct, narrow to absent. Second abscissa of M+Cu of hindwing 6 times as long as cu-v. Females: S5 carinate medially (Fig. 4E). Males: S4–S5 apical margins projected medially into hairy, pointed triangle processes (Fig. 4F) (South America)............................................... Coelioxoides exulans (Holmberg)

3 Gena with dense patch of pale pubescence along eye. Scutellum with dense, conspicuous patches of pale pubescence on lateral margins (Fig. 5A). Apical fascia on T1 uniform or narrowed medially. Depression before pronotal lobe oval, 2–2.75 times as long as broad (Fig. 5B). Males: S4–S5 apical margins with dense fringes of brown, curved apically hairs (Fig. 5C); Apical processes of T7 hidden by long, dark drown pubescence (Mexico, Central America)........ Coelioxoides punctipennis Cresson

- Gena with scattered brownish hairs along eye. Scutellum with inconspicuous patches of blackish pubescence or few pale hairs on lateral margins (Fig. 5D). Apical fascia on T1 enlarged medially. Depression before pronotal lobe elongate, 4–4.5 times as long as broad (Fig. 5E). Males: S4–S5 apical margins with inconspicuous fringes of brown, straight hairs, barely surpassing apical margin of sterna (Fig. 5F); Apical processes of T7 exposed, never hidden by dark brown pubescence (South America)............................................................................. Coelioxoides waltheriae Ducke