30 JANUARY 1909, Page 13

FOREST ENTOMOLOGY.

Forest Entomology. By A. T. Gilla.nders, F.E.S. With 851 Illustrations. (W. Blackwood and Sons. 15s. not.)—The study of insects injurious to man opens up a vast field for research, and Mr. Gillenders, who is woods manager to the Duke of Northumberland, has written a guide to the insects which injure man by attacking his trees. The student of forestry will find this treatise a useful introduction to the subject, with a number of excellent illustrations of insects and the injuries they inflict. The list of trees at the end of the book, with the names of the insects which injure them, will be of value in enabling the forester to identify the species, and to study the life-history of the insect in the body of the book. There is an introductory chapter which treats the elements of entomology very clearly, and the later parts of the book deal with the researches of German as well as English authorities. Preventive and remedial measures are also, where practicable, suggested.