Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Hemiptera - Elasmostethus

Hemiptera - Elasmostethus
Olympia, Thurston County, Washington, USA
August 16, 2014

not the same family as Chinavia
Moved from ID Request.

I'm no expert,
but it looks like a stink bug nymph. I'm not sure about western species, but I just found a Green Stink Bug (Chinavia hilaris) that looks similar to yours.