Transcriber Notes Emphasized text displayed as: _Italic_ and =Bold= AN ACCOUNT OF THE INSECTS NOXIOUS TO AGRICULTURE AND PLANTS IN NEW ZEALAND. THE SCALE-INSECTS (COCCIDIDÆ). By W. M. MASKELL, F.R.M.S., REGISTRAR OF THE UNIVERSITY OF NEW ZEALAND. WELLINGTON: BY AUTHORITY: GEO. DIDSBURY, GOVERNMENT PRINTER. 1887. Mr. Maskell's Account of the Scale-Insects occurring in New Zealand is published by the State Forests and Agricultural Department, under the instructions of the Hon. John Ballance, Commissioner of State Forests. Wellington, 31st March, 1887. CONTENTS. Chapter. Page Glossary of Terms and Phrases 1 I. Introductory 5 II. Characters, Life-history, and Metamorphoses of Coccididæ 8 III. Products of the Coccididæ (Honeydew; Black Fungus) 14 IV. Checks to Increase of Coccididæ, Parasites, etc. 18 V. Remedies against Coccididæ 24 VI. Catalogue of Insects and Diagnosis of Species 37 Groups-- Diaspidinæ 39 Lecanidinæ 62 Hemicoccidinæ 87 Coccidinæ 88 Index of Plants and the Coccididæ attacking each 111 Index of Genera and Species 115 PREFACE. The number and variety of the insect pests which live on the plants of New Zealand, whether native or introduced, and the damage which they frequently do, form the excuse for the appearance of this work. The descriptions of these insects in the Transactions of the New Zealand Institute, or in works published in Europe and America, are not easily accessible to the general reader, and are also much scattered and fragmentary. It was thought therefore that the time had arrived when the information which might be useful to gardeners and tree-growers, as well as to students, might be summarized and brought together in a compendious form, and the present volume is an attempt towards this.