pic of the bug is too small for me to tell. Can you zoom in closer, or use a magnifier?

is that any better? it doesn't seem to move, at least not fast, is very flat, and can be wiped off with my finger. They seem to be brown more than black. I was able to zoom in on the original picture, but it became bury when i saved it.

Looks like scale. Pretty light infestation at this point, which is a good time to attack them, lol. The adults are what you're seeing here; they molt to this form then settle down and stay in one spot the rest of their lives, like barnacles. The juvenile form can move around and are called crawlers.

I don't know where you are, and different areas have different kinds of scale insects, but the treatments are pretty much all the same. You get the adults, then re-treat to get the crawlers and again later to get any hatched eggs that produce more crawlers. So you will treat several times over several weeks to control. The warmer the temperatures the closer together the treatments will be, as eggs hatch quicker in warmer weather.

You can go organic or synthetic, but both ways will need follow up treatments.

Here's a page on Citrus pests in California, scale is listed on the right side, several varieties shown in the links. Many of these pests are in other states too. Florida has good pages also, as does Texas and Arizona, all citrus growing regions. Pick which area is closest to you and google their Ag web pages on Citrus pests, and then the sub category of scale insects. Good luck!

http://www.ipm.ucdavis.edu/PMG/selectnewpest.citrus.html

Thank you for the clarification on the pest, I will now try to remove them. I am Portland OR.

cheers