The mycoparasitic species: Cladobotryum mycophilum, Mycogone perniciosa, Sepedonium ampulosporum, Streptomyces sp., Apiocrea hyalina and Hypomyces macrosporus, all are reported for the first time in several places in the State of Mexico. It is included a table of mycoparasitic species and their hosts. New records of mycoparasitic fungi genera are reported: Cladobotryum mycophilum and Streptomyces sp., as well as for the hosts: Amanita pantherina, Boletellus chrysenteroides, Hygrophorus sp., Inocybe calamistrata and Pleurotus ostreatus.