Target pest: Costelytra zealandica (Coleoptera: Scarabaeidae), grass grub
Agent introduced: Ithone fusca (Neuroptera: Ithonidae)
Import source: Australia
Release details: One shipment of 6000 eggs released
Establishment: Not recovered
Cameron PJ, Hill RL, Bain J, Thomas WP (1989). A Review of Biological Control of Invertebrate Pests and Weeds in New Zealand 1874-1987. Technical Communication No 10. CAB International Institute of Biological Control. DSIR Entomology Division. 424p.
Tillyard RJ (1923). History of the introduction of beneficial insects into New Zealand. Proceedings of the Pan-Pacific Science Congress, Australia, 383-390.