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Species Oecanthus forbesi - Forbes' Tree Cricket

Oecanthinae nymph emerging from egg - Oecanthus forbesi Forbes' Tree Cricket  - Oecanthus forbesi - male 5016164 - Oecanthus forbesi - female Tree cricket - Oecanthus forbesi - female View of metanotal gland - Oecanthus forbesi - male Unknown Insect - Oecanthus forbesi - female Oecanthus fultoni ? - Oecanthus forbesi - male Forbes (??) Tree Cricket - Oecanthus forbesi - 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)
Subfamily Oecanthinae (Tree Crickets)
Genus Oecanthus (Common Tree Crickets)
No Taxon (Nigricornis Group)
Species forbesi (Forbes' Tree Cricket)

This species usually has a yellowish head. The antennal markings are very similar to Black-horned Tree Cricket. A vertical black strip on the medial portion of the scape (1st segment) and a shorter horizontal teardrop shape on the upper portion of the segment. Two horizontal marks are separated by a space on the pedicel (2d segment). Forbes' and Black-horned are very difficult to ID -- only the pulses per second (p/sec) of their song can distinguish one from the other. Forbes' pulses per second raises on hot days and lowers on cooler days; while the Black-horned TC's song remains fairly constant. On an 80+ degrees day Forbes' pulses per second will be approximately 80 p/sec and on a 60 degree day their call will be approximately 60 p/sec.

The female has a green body.

The male usually has a darkened strip in the center of the pronotum.
Ohio, Michigan, Indiana, Illinois, Wisconsin, Minnesota, Iowa and Missouri.
Similar habitat to Black-horned Tree Cricket -- low to the ground on various plants. May be found in low to the ground branches of small trees.
Tend to hatch in June and mate August to October.
Life Cycle
Undergo a paurometabolous development (Gradual Metamorphosis). Nymphs resemble small adults and gradually develop external wing buds. They live in the same habitat as adults, typically taking the same food.

Click on an image below to view the Life Cycle:


This is a sonogram of a male Forbes' tree cricket singing:

See Also
Black-horned Tree Cricket; Prairie Tree Cricket; Four-spotted Tree Cricket
Internet References
http://oecanthinae Tree Crickets - information and photos Singing Insects of North America