▁rounded ▁appearance ▁with ▁an ▁ir ides cent ▁blue / green ▁colour ation ▁and ▁is ▁a ▁pred ator ▁of ▁other ▁insect s . ▁It ▁was ▁introduced ▁to ▁New ▁Zealand ▁from ▁Australia ▁in ▁ 1 8 9 9 ▁and ▁ 1 9 0 5 ▁to ▁control ▁black ▁scale ▁and ▁blue ▁g um ▁scale ▁( see ▁scale ▁insect ) ▁on ▁cit rus ▁trees , ▁where ▁it ▁is ▁now ▁common ▁in ▁northern ▁regions . ▁It ▁has ▁also ▁been ▁recorded ▁e ating ▁San ▁Jose ▁scale . ▁They ▁are ▁about ▁ 3 – 4   mm ▁long . ▁ ▁See ▁also ▁Harm onia ▁conform is , ▁the ▁large ▁sp otted ▁lady bird ▁Il le is ▁gal b ula , ▁the ▁F ung us - e ating ▁lady bird ▁Two - sp otted ▁lady ▁be et le ▁ ▁References ▁ ▁Further ▁reading ▁ ▁F lyn n , ▁ ▁Alan ▁Richard . ▁ 1 9 9 5 . ▁" As pect s ▁of ▁the ▁bi ology ▁of ▁the ▁steel ▁blue ▁lady bird ▁Hal mus ▁ch aly be us ▁( Bo is du val ) ▁ ▁( C ole optera ▁: ▁C occ in ell ida ) ". ▁Th esis ▁( MS c – Z o ology ▁( Bi ological ▁Sciences )) ▁University ▁of ▁A uck land . ▁ 1 0 5 ▁leaves ▁with ▁illustr ations . ▁Lo , ▁P . ▁L . ▁( Dec ember ▁ 2 0 0 0 ) ▁Species ▁and ▁abund ance ▁of ▁lady bird s ▁( C ole optera : ▁C occ in ell idae ) ▁on