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Genus Euschistus

Pentatomidae - Euschistus conspersus Stink Bug Nymph (Euschistus) - Euschistus Is this male Euschistus variolarius? - Euschistus variolarius Stink Bug - Euschistus tristigmus Pentatomidae, dorsal - Euschistus variolarius pentatomid - Euschistus 7015416 Euschistus - Euschistus Moromorpha or Euschistus? - Euschistus biformis
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hemiptera (True Bugs, Cicadas, Hoppers, Aphids and Allies)
Suborder Heteroptera (True Bugs)
Infraorder Pentatomomorpha
Superfamily Pentatomoidea
Family Pentatomidae (Stink Bugs)
Subfamily Pentatominae
Tribe Carpocorini
Genus Euschistus
Explanation of Names
Euschistus Dallas 1851
20 spp. in our area, all in the nominate subgenus(1), >70 spp. in 4 subgenera total(2)
spp. not yet in the guide are all confined in our area to AZ and are apparently quite uncommon there (no US specimens in TAMUIC). =v=
8-15 mm
One thing that all the Euschistus spp. have in common, besides being brown, is a vague, barely visible dark patch in the center of the scutellum and a smaller matching spot on each upper wing half. These look more like smudges than markings, and are more visible in certain light conditions and at certain angles.(3)
Rear tibia grooved above:

most of our spp. are treated in detail in (4)
Guide to c. TX spp. in (5)
New World, by far most diverse in the Neotropics(6)
Woodlands, cultivated land, orchards
plant juices; may be destructive to crops, esp. fruits
occasional predation observed (Culliney 1985)
"Perhaps the most common of all stink bugs [at least in Texas] are in the genus Euschistus"(3)
See Also
Menecles, Podisus [superficially similar, note different structure of beak(7)]

Podisus spp. legs lack spots(3)
Works Cited
1.American Insects: A Handbook of the Insects of America North of Mexico
Ross H. Arnett. 2000. CRC Press.
2.Rider D. (2006-2013) Pentatomoidea home page
3.Austin bug collection
4.Revision of the genus Euschistus in Middle America (Hemiptera, Pentatomidae, Pentatomini)
L.H.Rolston. 1974. Entomologica Americana 48, 1:1-102 .
5.A visual guide for identification of Euschistus spp. (Hemiptera: Pentatomidae) in central Texas
JF Esquivel, RM Anderson, and RE Droleskey. 2009. Southwestern Entomologist 34:485-488. .
6.Pentatomidae (Heteroptera) of Honduras: a checklist with description of a new ochlerine genus
Arismendi N., Thomas D.B. 2003. Insecta Mundi 17: 219-236.
7.How to Know the True Bugs
Slater, James A., and Baranowski, Richard M. 1978. Wm. C. Brown Company.