探讨了栗山天牛幼虫期在林间的空间分布型。用m -x回归、S2 -x幂指数法回归及 6个聚集指标测定结果表明 ,该天牛属聚集分布 ,其聚集性随密度的增大而增加。聚集的原因 ,在虫口密度x≤ 2时 ,主要受寄主数量的影响 ;在x >2时 ,聚集的原因除与寄主数量有关外 ,还与成虫产卵的聚集行为有关。运用Iwao的m -x的回归中的两个参数α、β值 ,确定在不同精度下的理论的抽样数 ,便于在生产中应用 The spatial distribution of Larvae in the forest larvae was discussed. The results of m-x regression, S2-x power exponent regression and six aggregation indexes indicated that the genus Celastrus aggregated and its aggregation increased with the increase of density. The reason for the aggregation is mainly affected by the number of hosts when the density of insects is less than or equal to 2, and at x> 2, the aggregation is related to the aggregation behavior of adult eggs in addition to the number of hosts. Using Iwao’s m-x regression, two parameters α, β, determine the number of theoretical samples under different accuracies for ease of use in production