1 APRIL 1899, Page 26

A Test - book of Agricultural Zoology. By Fred V. Theobald, M.A.

(W. Blackwood and Sons. 8s. Gd.)—A sentence from the preface explains the subject of this volume :—Agricultural Zoology treats of the life histories, the habits, the peculiarities of all the animals which affect for good and for evil our stock and crops." The book is, of course, too technical for detailed notice, but we may quote an interesting instance of recent date of the beneficial work of the ladybird. " The destructive scale, Icerya purehasi, which all but annihilated the orange groves of California, has been checked and almost destroyed by the importation into America of the ladybird (Vedalia cardinalis), which feeds upon that scale in Australia."