IN the Scottish Forestry Journal (54, Pt. 2, Oct. 1940), Dr. A. E. Cameron, of the Department of Entomology, University of Edinburgh, writes on “The Effect of Felling on the Incidence of Forest Insect Pests”. The many fellings throughout Britain during the War of 1914-18 and the remnants left on the ground for several years thereafter were the breeding places of large numbers of some of the more dangerous of our insect pests, which afterwards spread destruction in young, middle-aged, and old woods throughout the country. Once again we are faced with a similar emergency, and the same aftermath of the fellings is to be seen on many a site of a former wood, now felled for war purposes. The insect pest question, as Dr. Cameron says, is likely to be acute in the near future unless attention is given to it, and some effort made to counter its possible or certain virulence. The author practically confines himself to conifers and their chief pests. But in parts of Great Britain there is an equal danger to some of the valuable hardwoods, including oak, ash and elm, to mention three only. But since the major part of the afforestation work of the Forestry Commission is connected with the conifers, the question of this possible insect danger is greater now than it was in 1918, when there was a comparatively small area of young conifer plantations in the country.