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Species Euthochtha galeator - Helmeted Squash Bug

Bug on Live Oak tree - Euthochtha galeator Pale Yellow/Cream-Colored Beetle, Assassin Bug? - Euthochtha galeator Stink Bug (brown) on Tall Nettle (Urtica procera) - Euthochtha galeator Helmeted Squash Bug  - Euthochtha galeator Helmeted Squash Bug nymph - Euthochtha galeator bug nymph - Euthochtha galeator Beetls Spider or catepillar mimic - Euthochtha galeator Helmeted Squash Bug - Euthochtha galeator - male
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 Coreoidea (Leatherbugs)
Family Coreidae (Leaf-footed Bugs)
Subfamily Coreinae
Tribe Acanthocerini
Genus Euthochtha
Species galeator (Helmeted Squash Bug)
Explanation of Names
Euthochtha galeator (Fabricius 1803)
galeator 'wearing a helmet'
14.5-17 mm(1)
All five nymphal instars are characterized by spines, mottling, and a dilated 3rd antennal segment;
the only e. US coreid whose nymphs have the 3rd antennal segment (only) dilated.

Males have a white- or cream-colored spur or flap on the posterodorsal corner of the side of the thorax (metepimeron) next to the abdomen. No other insect in e. US has such a projection. (Mead 2003)
e. US to Great Plains / Greater Antilles(2)(1)
Feeds on a variety of wild and cultivated plants (Mead 2003)
may become a pest in dooryard situations; can injure roses, citrus, etc. fruits/ornamentals (Mead 2003)
See Also

In Piezogaster, note the hairy antennae, the shorter, stouter scape, and (in males) the bent hind tibiae (comments)
Print References
Yonke T.R., Medler J.T. (1969) Description of immature stages of Coreidae. 1. Euthochtha galeator. Annals of the Entomological Society of America 62: 469-473.
Internet References
Featured Creatures - Mead 2003
Works Cited
1.How to Know the True Bugs
Slater, James A., and Baranowski, Richard M. 1978. Wm. C. Brown Company.
2.Catalog of the Heteroptera, or True Bugs of Canada and the Continental United States
Thomas J. Henry, Richard C. Froeschner. 1988. Brill Academic Publishers.