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Species Anasa tristis - Squash Bug

Squash Bug ? - adult - Anasa tristis Are these squash bugs? - Anasa tristis Squash Bug - Anasa tristis nymph - Anasa tristis Anasa tristis nymphs and eggs - Anasa tristis Squash Bug Nymph (Anasa tristis) - Anasa tristis Bugs on zucchini - Anasa tristis Anasa tristis
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 Hypselonotini
Genus Anasa (Squash Bugs)
Species tristis (Squash Bug)
Explanation of Names
Anasa tristis (De Geer 1773)
tristis 'sad'
adult 14-16 mm
Adults mottled dark gray to blackish above except pale medial line on head, pale lateral edges of pronotum, and lateral edges of abdomen with equally-spaced pale patches.
dark ant., dark legs, narrow pronotum (usually) w pale edges, head w pale medial line
across NA to Brazil - Map (1)(2)(3)
mostly: May-Oct (3)
Hosts: Cucurbitaceae; prefers pumpkin and squash
Life Cycle
Eggs laid in clusters of ~20, usually on the undersides of leaves. Completes life cycle in 6-8 weeks; one generation in the north, two or more in the south.
Eggs, nymphs, adult:
the most injurious coreid in FL(4)
causes wilting and blackening of leaves; can transmit cucurbit yellow vine disease
Trichopoda pennipes is a notable parasite (lays eggs on adults)
Print References
Beard RL. 1940. The biology of Anasa tristis DeGeer with particular reference to the tachinid parasite, Trichopoda pennipes Fabr. Connecticut Agricultural Experiment Station Bulletin 440: 597-679.
Internet References
Featured Creatures - Capinera (2017)(5)
Works Cited
1.Checklist of the Hemiptera of Canada and Alaska
Maw, H.E.L., R.G. Foottit, K.G.A. Hamilton and G.G.E. Scudder. 2000. NRC Research Press.
2.Catalog of the Coreidae, or Leaf-Footed Bugs, of the New World
Richard Packauskas. 2010. Fort Hays State University.
3.Global Biodiversity Information Facility (GBIF)
4.Coreidae of Florida (Hemiptera, Heteroptera).
Baranowski, R.M. and J.A. Slater. 1986. Arthropods of Florida and Neighboring Land Areas. Vol. 12, no. 630. viii + 82 pp.
5.University of Florida: Featured Creatures