Tetrastichus pantnagarensis Khan (Hymenoptera: Eulophidae) was recorded as a hyperparasite ofDiaphania indica (Saunders) (Lepidoptera: Pyralidae) throughApanteles taragamae Viereck (Hymenoptera: Braconidae). Studies were conducted on its biology. This solitary endoparasite oviposited in the host pupa within the host cocoon and the larva passes through 3 instars. Mean development time from egg to adult is 12–18 days at 26–43±2–53°C. After a preoviposition period of 1–2 days oviposition continued for 7–10 days. Mean adult longevity for males was 8·51 days and for females 11·41 days.