Ibalia leucospoides leucospoides Sirex noctilio ( Bain et al. 2012 ) Ibalia Ibalia l. leucospoides Ibalia leucospoides ensiger Norton I. l. leucospoides Overview and key to the New Zealand Cynipoidea (Hymenoptera) Ward, D. F. Zootaxa 2014 3878 6 563 579 5J3T6 Hochenwarth 1785 Hochenwarth 1785 [151,807,470,496] Insecta Ibaliidae Ibalia Animalia Hymenoptera 2 565 Arthropoda subSpecies leucospoides leucospoides    Ibalia leucospoides leucospoidesis a biological control agent, purposefully introduced into New Zealandfor the control of the European woodwasp,  Sirex noctilio( Bain et al.2012).  Ibaliais the largest cynipoid in New Zealandand is characterised by a strong laterally flattened metasoma, and with the marginal cell of forewing very long and narrow. It is now uncommon, but found throughout the country ( Nuttall 1989).   Ibalia l. leucospoideswas introduced in 1950–1951from Englandand then again in 1966–1968from Australia, where it had also been introduced as a biological control agent ( Bain et al.2012). It was first recovered in New Zealandin 1957 and is considered to be established throughout New Zealand( Nuttall 1989). In 1963, another subspecies,  Ibalia leucospoides ensigerNorton, was also introduced from California and also in 1966–1968from Tasmania. Although this subspecies was found again in some forests it has interbred with  I. l. leucospoidesand it has not been recognised since 1976 ( Nuttall 1989).