Hi everyone. I need some help identifying this insect. A few days ago, I noticed tons of these things crawling around on the deck in my back yard. They are very small (like ants, some smaller) and are a dark gray or light gray color. The head of the nail in the pic is about 1/4 inch in diameter.
I sprayed down some Ortho insect killer from Home Depot, but it has had no effect. What should I do?
Pic is at:
http://clearwaterdesigner.com/pics/mysterybug.jpg

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