A significant, although low, number of the hymenopterous parasites,Lysiphlebus testaceipes(Cresson), emerged from mummies of the parasitized greenbugs,Schizaphis graminum(Rondani) during refrigeration at 3.3°C. After refrigeration, high numbers of adult progeny emerged at 24°C from parasite mummies stored at –4.4, –1.1, and 3.3°C for 7 days. The difference in the emergence numbers between the temperatures was non-significant, as were the differences between adult progeny numbers from mummies produced by virgin parasites and female parasites placed with males for copulation. Low numbers of adult parasites emerged at 24.0°C from mummies stored for 30 days at all 3 temperature levels and for 60 days at –1.1 °C. Development and emergence required 2–5 days more for those few parasites which emerged from mummies stored at –1.1°C, excluding the refrigeration period, when compared to uninterrupted development at 24.0°C which required 9–11 days.