Yet to be Identified

Even with all the help available to me, as a non-entomologist I still have real difficulty giving a name to some of the insects and other invertebrates that I photograph. I'll be putting images of some of these here in the hope that visitors to the site will be able to help me. Please feel free to use the Comments facility to make suggestions for possible identifications.
 (Contains 15 photos)
Bees portfolio
 (Contains 3 photos)
Flies portfolio
 (Contains 7 photos)
Wasps portfolio