What kind of insect looks like wasp/bee and is mostly black with white stripes around its back?

Question

They were on a peach tree if that helps.

Answer 1

I prefer the name flower fly as that is where you find them.  They all belong to the family Syphidae.

http://bugguide.net/index.php?q=search&k...

Answer 2

http://farm1.static.flickr.com/21/311893...

this is a hover fly. They are pollinators, probably drinking nectar from ur peach. Their larvae are also pest controllers(some of them). Scaeva pyrastri is their species

Otherwise, may as well be a bee/wasp

Answer 3

How about a bald faced hornet?