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DRAGONFLIES Although in spring and early summer rivers and streams cascade down from the Thásos mountains, the majority of these soon dry up and by July permanent water bodies are extremely scarce on the island. A couple of kilometres up behind the mountain village of Maries there is the small reservoir of Lákos Kastróu [see van de Mast & Gruwel (1999) for details] but otherwise breeding habitat for dragonflies is in very short supply. Lopau (1999) summarised available published and unpublished records of Odonata from Thásos up the end of 1998, having visited the island in May 1996 and June 1997. His records cover a total of twenty-six species, amongst which the record of Ceriagrion tenellum at Skala Prinos is noteworthy. It is now recognised that tenellum is largely a species of western Europe and it is replaced by C. georgifreyi  in the eastern parts of its range. The Thásos record is considered to refer to the latter, which is otherwise known only from the Greek islands of Zakinthos and Corfu and along the Mediterranean coast from Turkey to Israel. To this list, I can add the record of a single specimen of Lindenia tetraphylla, photographed on the outskirts of Limenas in June 1982. This scarce species (determined by S.J. Brookes, BM(NH)) breeds in large water bodies and is unlikely to be resident on Thásos. Caliaeschna, Lindenia, C. georgifreyi and both Cordulegaster species are rare in Europe as a whole, with centres of distribution further to the east. The most comprehensive text for identification is Askew (1988), which also provides an indication of which other dragonflies may occur in this part of Greece. ODONATA CHECKLIST (nomenclature after Askew 1988) ZYGOPTERA Calopteryx virgo festiva (Brullé) Lestes viridis (Vander Linden) Lestes barbarus (F.) Lestes macrostigma (Eversmann) Platycnemis pennipes (Pallas) Cercion lindeni (Sélys) Ischnura pumilio (Charpentier) Ischnura elegans (Vander Linden) Ceriagrion georgifreyi (Schmidt)   ANISOPTERA Aeshna mixta Latreille Aeshna affinis Vander Linden Aeshna isosceles (Müller) Anax imperator Leach Anax parthenope Sélys Hemianax ephippiger (Burmeister) Caliaeschna microstigma (Schneider) Onychogomphus forcipatus (Linnaeus) Lindenia tetraphylla (Vander Linden) Cordulegaster picta Sélys Cordulegaster insignis Schneider Somatochlora flavomaculata (Vander Linden) Orthetrum cancellatum (L.) Orthetrum brunneum (Fonscolombe) Orthetrum coerulescens (F.) Crocothemis erythraea (Brullé) Sympetrum meridionale (Sélys) Sympetrum fonscolombei (Sélys) REFERENCES Askew, R.R. (1988). The dragonflies of Europe. Harley Books, Colchester. Lopau, W. 1999. Die Libellenfauna der griechischen Inseln Thássos, Samothráki und Limnos. Libellula, Supplement 2: 43-61. van de Mast, T. & Gruwel, R. [1999]. Walking on Thassos. (Privately published booklet).