Brown Stink Bug: Adult & Nymphs

In addition to the Dusky Stink Bug (Euschistus tristigmus), we also have the Brown Stink Bug (Euschistus servus). It is the most economically important member of Euschistus, as it can damage soybean, corn, cotton, alfalfa, sorghum, fruit, pecan, and tobacco.

Here is an adult I found on Azalea. Note the yellow venter.

And these are nymphs I found on weeds and grass.
3rd instar:

4th instar:

5th instar:

References:
http://bugguide.net/node/view/160209 (E. servus)
http://bugguide.net/node/view/237807 (E. s. servus)
http://entnemdept.ufl.edu/creatures/veg/bean/brown_stink_bug.htm (great info & photos)
http://www.americaninsects.net/ht/euschistus-servus.html
http://www.jstor.org/discover/10.2307/25083222?uid=3739776&uid=2&uid=4&uid=3739256&sid=21102463786441 (biology)
http://www.cirrusimage.com/bugs_stink_brown.htm
http://www.insectscience.org/11.168/i1536-2442-11-168.pdf (in corn)