Abstract
This paper concerns the populations of 13 species of soil Oribatei in two forest communities, studied by the analysis of frequency distributions of individuals in the samples. The data are based on a total of 1200 samples collected in the course of one year. 2. A statistic G1 is used to discriminate between the different theoretical distributions which have been proposed to allow for overdispersion, viz. Neyman type A, Polya-Aeppli, negative binomial and discrete log-normal. It is shown that, in general, the negative binomial is the type of distribution which most frequently occurs in our fauna. 3. The application of the U and T test to each species at the different times of the year confirms this conclusion.
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