fg-taxon #91 (Phasia sp.)
This is a real Phasia lookalike with it’s body shape and wing venation, but I have run it through the keys in Sun & Marshall and compared the venation and genitalia to the figures and I can’t see anything that comes close enough to convince me that it is a Phasia sp.
EDIT (Monty Wood 26/9/2010): This is indeed a Phasia sp. (female) and Sun & Marshall does not cover all the neotropical species.