角类肥蛛（Lariniodesco，、nuta）是棉田害虫的重要天敌，我国大多数省份都有分布，该蛛的生态学研究较多（赵敬别，1993），但细胞遗传学研究未见报道，近年，我们对其染色体核型作了研究，发现该蛛细胞中存在两类不同的核型，在染色体数目和结构上均存在多态现象，并发现了 Lariniodesco ,, nuta is an important natural enemy of pests in cotton fields. Most of provinces in our country have their own distribution. The ecology of the spider is more (Zhao Jingbie, 1993), but no reports have been reported on cytogenetics. In recent years, we have studied the chromosome karyotype and found that there are two different types of spider cells in karyotype, chromosome number and structure exist polymorphism, and found that