The genus Isophya is the largest genus of bush-crickets in Central Europe and the second largest in Europe. Its members are difficult to identify because of their morphological similarity. However, most species differ distinctly in their calling songs. Nearly half of the Central European species have been described less than fifty years ago, and no detailed revision has been published since this time. We have analysed male morphology and bioacoustics, and present figures of male pronotum and tegmina, cerci, stridulatory file and oscillograms of the calling songs of all species known to occur in the region including a identification table. According to these data, the following taxa are considered to be valid species:

Human use of slope and subalpine meadows in the Bieszczady Mountains (Southeast Poland) has greatly decreased in the last 60 years. We investigated whether the change in land use has affected the species composition of the Orthopteran fauna. From 1996-2002, we found 35 species of Orthoptera. We recorded four Isophya species, of which I. kraussii and I. pienenis were not previously reported for the Bieszczady. Other new species for the Bieszczady were Chorthippus pullus and Omocestus rufipes. We assume that three Orthoptera species have disappeared from the Bieszczady due to decreased grazing but that the Carpathian species have been little affected.

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