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For Insects, Spiders & Their Kin
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Family Gryllidae - True Crickets

Looks like Subfamily Nemobiinae (ground crickets) - Allonemobius Cricket nymph? - Oecanthus quadripunctatus Drumming Katydid? - Oecanthus - female Gryllus pennsylvanicus? - Gryllus - male Ground Cricket - Eunemobius carolinus - female tree cricket - Oecanthus - female Snowy Tree Cricket? - Oecanthus Eunemobius carolinus - female
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Orthoptera (Grasshoppers, Crickets, Katydids)
Suborder Ensifera (Long-horned Orthoptera)
Infraorder Gryllidea (Crickets)
Family Gryllidae (True Crickets)
Synonyms and other taxonomic changes
Gryllidae Laicharting, 1781. Synonyms, etc.:
Trigonidiidae (sometimes misspelled Trigonididae)
8 other synonyms listed at OSF
Explanation of Names
English cricket is from Middle English creket, that from Old French crequet. The ultimate origin is onomatopoeic, imitative of the sound made by these animals (1).
Certain crickets (winged bush-crickets, here classified as subfamily Trigonidiinae ) are called "trigs", apparently short for Trigonidiid, that in turn from genus Trigonidium Rambur, 1838. This would appear to be from Greek trigonos three-cornered.
8 subfamilies, 28 genera, 112 species North of Mexico (SINA)
Long, slender ovipositor. Long antennae. 3-segmented tarsi.

Overview of Subfamilies:

Gryllinae - Field Crickets - distributed across most of North America

Nemobiinae - Ground Crickets - also across most of the continent, with most diversity in the eastern states

Trigonidiinae - Winged Bush Crickets/Trigs - eastern states, with highest diversity in the southeast

Oecanthinae - Tree Crickets - widespread across the continent

Hapithinae - Bush Crickets - eastern states, with highest diversity in the southeast

Pentacentrinae - Anomalous Crickets - 1 rare species known only from TX and OK
Print References
The Century Dictionary--entry for cricket (1)
Internet References
classification plus synonyms, common name reference, included taxa, and literature citations (Orthoptera Species File)
Information and links (U. of Florida)
List of species, maps, photos, etc. (Singing Insects of North America)