These aphids are being tended to by acrobat ants (Crematogaster spp.) on the flowers of an American trumpet vine (Campsis radicans).
If anyone can take this spotting down past the family level (or beyond), I'd greatly appreciate it.
Lat: 36.15, Long: -95.99
Spotted on Aug 24, 2012
Submitted on Aug 31, 2012