Photographed on the Greek Island of Naxos, 22 Sept. 2010.
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From the shape of the pronotum I tend to think Acrida rather than Truxalis. The most widespread species on the Greek islands is Acrida ungarica according to Willemse's Catalogue of the Greek Orthoptera.
It does look like this species, which I have seen a lot on Crete, if I am correct in its ID. I don't know what the range of the Truxalis is. It would be good to hear from an expert on this one!
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According to Willemse, Truxalis is widespread on Crete, but so is Acrida turrita. A.ungarica is absent.
Bang goes that one, then!!
This is why iSpot is so good..you can very quickly be put right on misconceptions! The danger of working from books with limited species is evident again.
Many thanks for this information. I see that Acrida ungarica is present on Naxos (http://www.faunaeur.org/Maps/display_map.php?map_name=euro&map_language=...)
Lat/Lng: 37.04, 25.42