Abstract: In Horqin sandy land, the dominant species are Anomala exoleta Faldermann and Serica orientalis Motschulsky. But the communities of Scaraeoridea Larvea are different in fixed sand land, semi-fixed sand land, farm land and sandy meadow. This means they have different common species. As for density, frequency and the number of Scaraeoridea Larvea, the order is farmland > fixed sand land > semi-fixed sand land. In sandy meadow, the density and frequency of Scaraeoridea Larvea are higher than that of in other inhabits. But the number of species is lower. Because the condition of weather and environment, the densities of Scaraeoridea Larvea are higher in summer than that of in spring and autumn. But the dynamic feature is different between years. In semi-fixed sand land and fixed sand land, because of the poverty of the soil and plant, the rainfall is the key factor for Scaraeoridea Larvea growth.

Key words: Horqin sandy land, community of Scaraeoridea Larvea, seasonal dynamic