Beetles.

Perhaps one of the May Beetle / June Bug group of scarabs.
("bug" in this case is actually a beetle, like in "ladybug")

http://bugguide.net/node/view/41314/bgimage?from=0
(note there are 71 pages of these at the above link)
(but your light-colored beetle looks like those on page 1)

If your two beetles are very similar in size, they may be of the same species, color can vary between sexes, and the antennae on these beetles usually varies by sex, can't tell about this in your pictures.

A better picture of the dark one would help.