what is this beautiful beettle?

Your beetle is NOT the Emerald Ash Borer, and is very obviously NOT of the genus Eudicella (which is in the scarab beetle family). Femme Fatale calls Eudicella a "genus family", which is your first clue that something is wrong. Look at this page to compare your beetle with Eudicella beetles:

http://www.naturalworlds.org/scarabaeidae/species/...

Randall comes closer to a correct ID because the Emerald Ash Borer is in the same family as your beetle. That family is Buprestidae (Metallic Wood Boring Beetles). The emerald ash borer only superficially resembles your beetle. It is more elongated and has a different color pattern and head shape. Compare yours with:

http://en.wikipedia.org/wiki/Emerald_ash_borer

Your beetle belongs to the genus Buprestis and is most likely Buprestis aurulenta. Buprestis salisburyensis looks nearly identical as well. I don't know a specific common name, but many beetles in this family are called Jewel Beetles. Like the EAB, your jewel beetle does damage trees (douglas fir, ponderosa pine, pinyon pine) as the larvae burrow and eat the wood, but yours is a native species and is not a serious problem.

http://bugguide.net/node/view/74029/bgimage

http://www.forestry.ubc.ca/fetch21/FRST308/lab7/bu...

It is an Emerald Ash Borer... kill it! These beetles get into Ash trees and kill them. Where I live (WI) they're a huge problem. It doesn't seem like such a pretty little beetle can kill such big trees, but they can. They are spreading all over the country and killing Ash trees every place they go. Have you ever heard the saying "Burn it where you buy it" about firewood? This pretty little bug is the reason you're not supposed to move firewood from town to town, because they get inside the wood and when you move it the beetle gets out in the new place and infects the uninfected trees.

www.stopthebeetle.info

it is wonderful indeed the colors are amazing.

is an insict of Eudicella genus family!

here you will find all info about this amazing little creature

http://www.insectgeeks.com/forums/display_topic/id...

lol well if im not mistaken its the northwestern ivy beetle dont get too close or touch it

They crawl up your butthole scavenging for left overs.

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