This one was photographed on May 13, 2012. Sam found it crawling on the siding of our house. It was a bit less than a centimeter long, and looked kind of like a levitating grass seed.
I wasn’t having much luck finding this one at first, because I was looking under the “plant bugs”. But, after browsing through my copy of the Kaufman Field Guide to Insects of North America, it looked like the “Stilt Bugs” (family Berytidae, were a much better match.
Specifically, the body shape and the bulges at the midpoints of the antennae look very much like Berytinus minor, another accidental introduction from Europe sometime around 1929.
They evidently suck plant juices, and back in their native range in the British Isles they particularly like clover, lesser yellow trefoil, and “rest-harrow”. There’s a lot of clover in our yard, so that’s probably what they are eating around here. They overwinter as adults, which is why we found this one so early in the season.