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).
Range
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.
Habitat
Deciduous trees and the vegetation beneath.
Season
July-November
Food
Mainly aphids
Life Cycle
One generation per year; overwinters as eggs laid in bark crevices.
Remarks
This species calls by drumming the hind tarsus on a leaf (1)
Commonly preyed upon by wasps in the genus Isodontia.
See Also
M. meridionale - like M. thalassinum but with tiny wings