Hi again Angie
I can't explain why I think it's a bee, but the one in your picture just has the look of a bee somehow. Is there a bee expert here who can confirm or deny...? Some bees aren't very hairy.
Looking up "solitary bees" I got this from http://en.wikipedia.org/wiki/Halictidae
Halictidae is a cosmopolitan family of the order Hymenoptera consisting of small (> 4 mm) to midsize (> 8 mm) bees which are usually dark-colored and often metallic in appearance. Several species are all or partly green and a few are red; a number of them have yellow markings, especially the males, which commonly possess yellow faces, a pattern widespread among the various families of bees. They are commonly referred to as sweat bees (especially the smaller species), as they are often attracted to perspiration; when pinched, females can give a minor sting...
"...Common carpenter bees are about 25mm long, but some species are smaller and have black or metallic coloration, like the Ceratina sp. pictured left."
Here's a picture of a carpenter bee, Ceratina sp, from the second site. I couldn't find the size of the bee in this picture but a bigger species was down as 8mm. Maybe if you did a search for Ceratina...?
Just found a bit more info from the Brittanica site http://www.britannica.com/EBchecked/topic/96744/carpenter-bee :
any of a group of small bees in the family Anthophoridae (order Hymenoptera) that are found in most areas of the world. The small carpenter bee, #Ceratina, is about six millimetres long and of metallic coloration. It nests in plant stems, which the female first hollows out and then packs with pollen and eggs. A number of individual cells are placed in a row, separated by thin partitions of wood debris mixed with saliva. The large carpenter bee, #Xylocopa, somewhat resembles the bumblebee but differs in having a nonhairy abdomen and in its habit of nesting in a tunnel