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First reports of 5 species of scale insects are given for the Comoros (Prococcus acutissimus, Pulvinaria psidii, Paracoccus burnerae, Planococcus minor, Unaspis citri,) and 8 species for the Seychelles (Protopulvinaria pyriformis, Nipaecoccus viridis, Phenacoccus madeireinis, Phenacoccus parvus, Pseudococcus jackbeardsleyi, Saccharucoccus sacchari, Conchaspi angraeci, Aulacaspis tubercularis)

Feeding bebavior is fundamental in the process of phytophagous insect diversification (Caillaud & Via, 2000). The feeding bebavior of phytophagous insects is responsible for both direct damage and the transmission of pathogens. Planthoppers are a biogeographically diverse, monophyletic clade with about 12,000 described species grouped into 18 families (O'Brien, L.B. 2002; Stroinski A& Szewedo J., 2002). About 30 species of planthoppers are reported as vectors of plant pathogens, in such familes as Delphacidae, which transmit viruses (Nault & Ammar, 1989), or Cixiidae, which transmit phytoplasmas (Purcell, 1985). Transmission of circulative and non-circulative pathogens depends on stylet

The status of knowledge on the entomofauna of La Réunion appears quite variable depending on the insect order considered. While Coleoptera and Lepidoptera have received sustained attention, it is only recently that some other groups such as Odonata, Dictyoptera, Thysanoptera or Hemiptera Auchenorrhyncha have been extensively studied. Other important orders such as Diptera and Hymenoptera appear to be far less known and will require extensive studies in the future. Within the on going process of the creation of a National Park in the highlands of La Réunion, a series of studies was initiated by the "Mission Parc National des Hauts de la Réunion", aiming at synthetising the current knowledge on various groups of plant and animals. CIRAD was in charge of the work on entomofauna. In collaboration with the Natural History Museum, the Insectarium of La Réunion and some individual specialists, an attempt was made to synthetize the current status of knowledge on the different insect orders based on existing literature records. The attention was focused on four groups (Odonata, Hemiptera Auchenorrhyncha, Coleoptera, Lepidoptera) selected on the base of their knowledge status or their possible interest as bio-indicators. All endemic taxa from La Réunion or from the Mascarenes were listed and their known geographical distribution precised. The corresponding database was used with GIS to draw maps of areas showing a particular interest for the conservation of these endemic taxa. Further studies should be conducted to extend to database to all orders of insects and other group of arthropods. (Texte intégral)