Identification: Need help identifying this fungus

I found this fungi\us under the ole' locust tree in my lawn. It is a pretty fungus as many are. Can you help me identify these? I live in NW Ohio.

Thanks.

 

Might be Chlorophyllum molybdites, which is mentioned in this previous post:
http://www.botanicalgarden.ubc.ca/forums/showthread.php?t=19188

Do spore print.
C. molybdites will give a green print.
A similar looking species, Macrolepiota rhacodes will give a white print.

 

I am a little dumb about all these fungi - can you describe how to do a spore print?

Thanks for replying - appreciate!!

Jerry

 

Making your own spore print:
http://www.hiddenforest.co.nz/fungi/fun/sporeprints.htm

 

I'd like an update on the spore color when you take one. i'm leaning 75/25 towards Lepiota over Chlorophyllum.