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Species Alcaeorrhynchus grandis - Giant Strong-nosed Stink Bug

Big Stinker - Alcaeorrhynchus grandis battle between a beetle and a caterpillar - Alcaeorrhynchus grandis BG3134 F0002h - Alcaeorrhynchus grandis Alcaeorrhynchus grandis (Dallas) - Alcaeorrhynchus grandis Stink Bug - Alcaeorrhynchus grandis Alcaeorrhynchus grandis nymph ? - Alcaeorrhynchus grandis Predatory stink bug? - Alcaeorrhynchus grandis Predatory stink bug? - Alcaeorrhynchus grandis
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 Asopinae (Predatory Stink Bugs)
Genus Alcaeorrhynchus
Species grandis (Giant Strong-nosed Stink Bug)
Explanation of Names
Alcaeorrhynchus grandis (Dallas 1851)
♂ 16‒21 mm, ♀ 18‒25 mm
Large, flat, speckled brown, with a short stabbing beak; can be distinguished from Podisus by larger size (>15 mm; Podisus adults reach only 14 mm) and by the double-pointed humeral spines.

Instars III‒V are blue-black with red keels on the pronotum; instar V also has reddish bars.(1)
se US (NC‒FL‒TX) to Argentina(2)(3)
on soybean, eggplant, and shrubs near streams & marshes(4)
See Also
First instar is hard to distinguish from that of Euthyrhynchus floridanus: both have a blue-black head and thorax and red abdomen with dark central and lateral rows of dark-colored plates, but egg masses differ: in E. floridanus, it's loosely oval and contain 20‒90 eggs; in A. grandis, 100‒200 eggs in multiple rows.(1)
Internet References
Fact sheet (Richman & Mead 2014)(1)