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Genus Geocoris - Big-eyed Bugs

Geocoris sp. - Geocoris pallens true bug on cactus - Geocoris pallens Geocoris pallens - Western Big-eyed Bug? - Geocoris undescribed - male - female Big-eyed bug from Jasper 10.07.11 - Geocoris bullatus Big-eyed Bug - Geocoris pallens Geocoris punctipes? - Geocoris punctipes Geocoris? 2 - Geocoris Pidgeon Point 1 - Geocoris
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 Lygaeoidea
Family Geocoridae (Big-eyed Bugs)
Genus Geocoris (Big-eyed Bugs)
Explanation of Names
Geocoris Fallén 1814
25 spp. in our area(1), ~170 worldwide(2)
3-4 mm
most of NA and the world; G. punctipes and G. pallens are the most common species along the cotton belt.
On ground between clumps of weeds and sparse grass, especially in sandy places, in woods and near streams(1). southern regions of the U.S. in most cropping systems
generalist predators of small arthropods(2)
Life Cycle
overwinter as adults. Eggs that are laid singly on leaves or stems hatch in approximately one week. Big-eyed bugs have five nymphal instars, each of which lasts from 4 to 6 days. Adults live approximately one month and a female can lay up to 300 eggs during her adult life span.
Big-eyed bugs are among the most abundant and important predaceous insects in many crops in the US(3), e.g. on cotton plantations
Print References
Barber, H.G. (1935) New Geocoris from the United States, with key to species (Lygaeidae: Geocorinae). Journal New York Entomological Society, 43:131–137. (Full Text)
McAtee, W.L. (1914) Key to the nearctic genera and species of Geocorinae (Heteroptera: Lygaeidae). Proceedings of the Biological Society of Washington, 27:125–136. (Full Text)
Internet References