A Method of Counting Large Samples of Small Arthropods

Abstract

Various methods have been described for the extraction of small Arthropods (Collembola, mites, thrips, etc.) from soil, vegetation, or refuse, in which the animals are finally floated on the surface of the water and maybe, subsequently, trapped on a filter paper. In a single sample of this nature over a thousand specimens, comprising many species, may be obtained, and unless mechanical aids are utilized in studying the filter paper there is grave danger that many individuals will remain unnoticed. To ensure accuracy in this respect the writer has devised the following technique.