Thanks for the feedback everyone. I am really happy with the hoverfly and blue banded bee shots.
Details: Canon 50D, 100mm f2.8 lens, 580EXII speedlite with a lumiquest softbox attached.
Most images are tv=1/250, Av= f11 to f16, ISO 400, flash on manual mode: 1/2 -0.3 power.
To get the hoverfly shot I had to go to Liveview - much easier to follow than with your eye to the viewfinder.