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I just got confirmation from Greg Courtney of Iowa State Uni, a world expert on this group, who confirms the genus ID and the likely species ID: Yes, your images are of Apistomyia, and A. elegans is the likely species. He also confirms that adults of this and related genera are flower feeders, using specialised elongated mouthparts. Quick biology summary: females of some Blepharicerid species are predatory, other species have reduced adult mouthparts. The larvae are highly specialised for feeding in high current mountain streams, with six ventral hydraulic suctorial discs. They are only found in clean, cool, well oxygenated streams and could be useful indicators of water quality. An interesing group! see http://www.ent.ia...ology.html