Key to extant genera of Odiniidae in the Neotropical Region and to species of the Pauximyia gen. nov.

(modified from Gaimari & Mathis 2011)

1. Posterior ocelli in line with inner vertical setae; ocelli arranged in equilateral triangle or with distance between posterior pair greater than between posterior ocellus and anterior ocellus; frons flat to slightly concave. Scutellar disc bare. In profile, face usually distinctly angulate with frons at antennal insertion ( Odiniinae)...................... Odinia Robineau-Desvoidy

- Posterior ocelli in front of line between inner vertical setae; ocelli usually arranged in isosceles triangle with distance between posterior pair conspicuously less than between posterior ocellus and anterior ocellus; frons usually relatively arched (sometimes conspicuously tuberculate). Scutellar disc sometimes setulose. In profile, face and frons more or less in line or sloping ( Traginopinae)............................................................................................ 2

2. Ocelli on moderately large to large tubercle, well in front of vertex.............................................. 3

- Ocelli and frons normal, lacking enlarged tubercle, but occasionally on raised bump little larger than diameter of anterior ocellus................................................................................................. 4

3. Arista long plumose. Vein M 1 strongly curved at apex....................................... Paratraginops Hendel

- Arista pubescent. Vein M 1 straight ......................................................... Neotraginops Prado

4. Costa extended to vein M 1. Genal seta present ............................................................... 5

- Costa extended to vein R 4+5. Genal seta absent.............................................................. 7

5. Scutellum at most bearing 2–5 setulae along margin.......................................... Lopesiodinia Prado

- Scutellar disc and margins bearing numerous setulae......................................................... 6

6. Only anterior fronto-orbital seta inclinate.................................................. Schildomyia Malloch

- Several anterior fronto-orbital setae inclinate............................................ Neoschildomyia Gaimari

7. Postocellar setae present ................................................................................ 8

- Postocellar setae absent............................................................................... 10

8. Scutellar disc setulose. Several anterior fronto-orbital setae inclinate................................ Shewellia Hennig

- Scutellar disc bare. Only one fronto-orbital seta inclinate..................................................... 9

9. Face uniformly yellow, lacking mid-longitudinal stripe. Lunule higher than frons. Antennae separated by a distance greater than 3X the diameter of a single antennal socket. Vein M 1 becoming distinctly weaker from crossvein dm-m towards wing margin.................................................................................... Helgreelia Gaimari

- Face brown to black pruinose with white mid-longitudinal grey pruinose stripe. Lunule shorter than frons. Antennae separated by a maximum distance of 2X the diameter of a single antennal socket. Vein M 1 normal, distinctly reaching wing margin........................................................... Inpauema Limeira-de-Oliveira, Marques, Reis & Rafael

10. Four and/or five pairs of fronto-orbital setae. Dorsocentral setae 4 (1+3). Scutellum with setulae anterior to basal scutellar seta. Surstylus articulated with epandrium....................................................... Pradomyia Gaimari

- Three pairs of fronto-orbital setae (Figs 3–4, 15–16). Dorsocentral setae 5 (1+4). Scutellum lacking setulae. Surstylus non-articulated with epandrium (Figs 9, 12, 20)............................................... Pauximyia gen. nov. ... 11

11. Lunule with velvet black band through upper part of antennal bases (Figs 3–4). Hind tibia almost as long as fore tibia (Fig. 1)............................................................................. Pauximyia oliveirai, sp. nov.

- Lunule entirely white (Figs 15–16). Hind tibia about half the length of the fore tibia (Fig. 13).... Pauximyia vidali, sp. nov.