Another great thematic thread Peter
. I'm pretty fascinated with the whole insect life cycle, and the past few years I've raised many Lepidoptera from the egg or caterpillar stage for both ID purposes and to photograph the life stages. I may have put these two on PF before, I'm not sure (some lighting info is on Flickr if you follow the link
)
A Hyalophora cecropia caterpillar (giant silk moth). I've bred them the past couple years, great fun! This is the 4th stage of caterpillar, one more to go and then pupa time.
A Vanessa virginiensis, American Painted Lady Butterfly. This is it's final size before pupating (photo is 1:1 magnification on APS-C). Host plant here is Antennaria neglecta, Field Pussytoes).