Encarsia species (Hymenoptera: Aphelinidae) of Australia and the Pacific Islands attacking Bemisia tabaci and Trialeurodes vaporariorum (Hemiptera: Aleyrodidae) - a pictorial key and descriptions of four new species.
After the recent introduction of the pest whitefly B. tabaci biotype B into Australia, research was undertaken to study the parasitoids of the long established native B. tabaci and Trialeurodes vaporariorum. The genus Encarsia contains species which are important biological control agents of whiteflies and hard scales. The taxonomy of the Encarsia species attacking B. tabaci and T. vaporariorum in Australia and the Pacific Islands is revised. DNA sequencing of the 28S D2 ribosomal DNA was used to characterize species. Sixteen species are recognized, with 12 occurring in Australia, 8 in the Pacific region, and 4 in both regions. All except one species (E. formosa) are new records for Australia. Four species are described as new from Australia: E. accenta sp. nov., E. adusta sp. nov., E. oakeyensis sp. nov., and E. ustulata sp. nov. Diagnostic descriptions are given for all species and each species is illustrated. A pictorial key is provided to allow the identification of species by non-specialists.