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Efferia spp. Sorry Marc; this is best ID that can be made from photos of this huge genus.

1) Two spp. involved -- male is distinct from female; clear differences in height of hairs along scutum, color of hairs on scutellum, etc.; male has diff. shape to face (gibbosity bigger) and bristles near vertex too long...

2) Neither can be confirmed as very similar looking Efferia albibarbis (widest-spread of all Efferia spp) -- though female is closer to this sp., maybe deserves a "cf. E. albibarbis" as a name. Exact sequence & intensity of spots on abdomen and genitalia shape wrong for both sexes as E. alibarbis.

3) Wing venation must be clearly seen for ID's in this group.

Cheers,

Eric