A tiny, sea-green katydid with a tympanum fully exposed on each foretibia. Forewings longer than hindwings. No stridulatory area apparent at base of male forewings. Male cerci long, slender, tubular, curving upwards (1).
Europe. Introduced into North America; currently Michigan & Ohio east to Atlantic coast; sw. British Columbia to w. Oregon, and likely still expanding. See also BugGuide range map for an indication of the expansion of the range into neighboring states.
Deciduous trees and the vegetation beneath.
One generation per year; overwinters as eggs laid in bark crevices.
This species calls by drumming the hind tarsus on a leaf (1)
Commonly preyed upon by wasps in the genus Isodontia.
M. meridionale - like M. thalassinum but with tiny wings
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