nigricollis cardiochiles Cameron is a larval endo-parasitoid of Cnaphalocrocis medinalis (Guenee) and Marasmia exigua Butler, two rice leaf folder species. On the host C. medinalis, the developmental biology of C. nigricollis was investigated. The parasitoid usually parasitized the third and fourth instar larvae of the leaffolder species. Four instars...