entomology question

[TurbineBlade]

Hey -- I dug up several cased caddis nymphs that were strikingly green-colored (see one from my post a couple of days ago).  

Anyone know what species this is?

I found this -- http://www.west-fly-fishing.com/entomology/caddis/green.shtml

which suggests that this genus is of "free-living" caddis...which would seem to conflict with my pulling 2 of them out of their very obvious case before getting a good look.  

I'm still learning the bugs and don't have much experience in this -- anyone know these caddis nymphs well?

Gene