This is the fourth in the CITES orchid checklist series, and covers the genera Aerides, Coelogyne, Comparettia and Masdevallia. It contains a full list of accepted names, synonyms and distribution of all species concerned. For the first time the Checklist is included on CD-ROM, (integral with the book), which also includes Checklists 1-3. Covering a total of some 35 genera it is thus an invaluable tool for anyone working in CITES or more specifically on orchids.