The precision of insect number determination in forest litter using a method, in which the sample element comprised 10 plots of 0.5 m² each, was compared with that of the method, in which the sample element consisted of one plot of 5 m². Investigations were conducted in four pine stands aged 59-80 years. The number of cocoons of Diprioninae found in the litter was counted. It was found that the precision of the compared methods was very low at a slight density of cocoons and it increased with an increase in their density. It would not be justified to say that the two compared methods of measurement for sawfly cocoon density differ in terms of their precision.

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