Since this work has been in type, the author has received a letter from the State Inspector of Fruit Pests for California, in which the writer states that the insect _Icerya Purchasi_ has there, especially in the southern part of the State, gained such hold on the orange-groves, in spite of the most strenuous efforts, that the people find it impossible to keep it down. Orange- and lemon-growers (and indeed other tree-growers) in New Zealand, especially in the North Island, should take note of this fact, and beware of ever letting this omnivorous and most destructive insect obtain any footing on their trees. _A speedy burning of every infected tree is the best remedy in this case._ Transcriber Notes All illustrations moved so as to not split paragraphs. The notes explaining the damage done by the insects in the "INDEX OF PLANTS AND THE COCCIDIDÆ ATTACKING THEM." were moved before the table. End of the Project Gutenberg EBook of An Account of the Insects Noxious to Agriculture and Plants in New Zealan, by W. M. Maskell