Good pictures. I have had good luck with this lens in the close-up mode, too.
I haven't found the wasps (haven't looked yet) or surprisingly the skimmer, which looks distinctive enough, but the scarab is a Flower Beetle Trigonopeltastes delta - very distinctive.
Edit: The first wasp may be a Digger Wasp Scolia dubia , and the second some kind of Potter or Mason Wasp (can't find the exact one).
Last edited by penolta; Jun 17, 2009 at 9:49 PM.