The collection of birdsskins made by Mr. H. A. Lorentz during his glorious and successful expedition to the snowy mountains of New Guinea contains nearly thousand specimens. As could be expected, there are many interesting examples in the collection, new species as well as such which as yet had not been recorded from western New Guinea. The descriptions of the new forms, collected in the higher parts between 2600 and 4200 m., are given in the following lines; the report on the whole collection shall be published in „Nova Guinea”.