AS a guide to the industrial chemist desirous of learning something of the appearance and mode of occurrence of the insect and arachnid pests of stored products this book is useful. The excellent illustrations by Mr. Harry Britten are numerous, the description of the insects is reasonably adequate, and the emphasis laid on cleanliness in stores and in vehicles of transport is sound. A list of “substances and their pests” is given as an appendix to the book and there is a short index of contents. The inclusion of the moths Plodia and Ephestia among the “substances” as “subject to attack” by the parasitic wasp Habrobracon is amusing. Insect Pests in Stored Products By H. Hayhurst. Pp. xii + 83 + 49 plates. (London: Chapman and Hall, Ltd., 1940.) 15s. net.