Hibiscus Bug

You may have seen this bug around your yard and, like me, assumed it was a kind of stink bug. Actually, it's not! After an hour and a half of struggling to find this bug's name, I'm now able to identify it as the Scentless Plant Bug Niesthrea louisianica, sometimes called the Hibiscus Bug because that plant is one of their hosts. Whereas Stink Bugs are members of Pentatomoidea, Scentless Plant Bugs are members of Coreoidea. The Hibiscus Bug's family is Rhopalidae, subfamily Rhopalinae, tribe Niesthrini. Although it is abundant, it doesn't damage plants.

As I see it, the most obvious difference between scentless plant bugs and stink bugs is that the sclerotized part of the latter's forewings (called hemelytra) is dark, matching the color of the pronotum, whereas the former's wings have almost transparent hemelytra.

References:
http://bugguide.net/node/view/52865
http://davesgarden.com/guides/bf/go/4480/
http://www.ingentaconnect.com/content/esa/aesa/1977/00000070/00000005/art00002