These were found in huge abundance, all over almost every piece of new growth that was available. Notably, they seemed particularly dense on new Salsola spp. The surrounding area was primarily fine aeolian sand dunes and sparse Mesquite bosque (Prosopis glandulosa) with a wide variety of annuals present. I noticed some variety in coloration of the bugs, but did photograph more specimens. Brief exploration of bug guide leads me to believe its a member of Pentatomidae... can anyone narrow it down for me?

Thanks!