ECONOMIC ZOOLOGY ENTOMOLOGY. 53 



Some common plant diseases, W. B. McOallum (Arizona Sta. Bui. 60, pp. 

 JfoG-Jtd'i) . — Directions are given for the preparation and use of fungicides, and 

 I)opular notes on a number of fungus and bacterial diseases of plants, together 

 with suggestions for their prevention. 



Directions for the control of Nebraska plant diseases, E. M. Wilcox and 

 R. E. Stone {Nebraska Sta. Rpt. IDOS, pp. 21-63). — The symptoms and cause 

 of the different diseases are described and methods given for their control or 

 prevention. The diseases are arranged alphabetically by their prevailing com- 

 mon names, under the various crops which are arranged in a similar manner. 

 Bibliographies containing references to some of the more recent literature are 

 given under the different diseases. 



ECONOMIC ZOOLOGY— ENTOMOLOGY. 



Biological investigations in Alaska and Yukon Territory, W, H. Osgood 

 {U. S. Dipt. Agr., Bur. Biol. Surrcjf, Xorth American Fauna Xo. 30, pp. 96. pis. 

 5, figs. 2). — Biological investigations made in the interior of Alaska and Yukon 

 Territory in 1903 and 1904 are here reported. Three distinct areas are consid- 

 ered, namely, East Central Alaska (pp. 7^4), the Ogilvie range, Yukon Terri- 

 tory (pp. 45-65), and the Macmillan River, Yukon Territory (pp. 66-92). 



The physiography of these areas is described and detailed accounts are given 

 of the animal life of the region, especially the abundance, ranges, and general 

 habits of the game and fur-bearing animals. It is considered that under proper 

 regulations the fur-bearers should increase and that the game animals of 

 Alaska should continue indefinitely to be a source of food and profit to the 

 Territory. 



The rabbits of North America, E. W. Nelson (U. 8. Dcpt. Agr., Bur. Biol. 

 Survey, North American Fauna No. 29, pp. 31Jf, pis. 13, figs. 19). — ^This mono- 

 graph includes all the known hares and rabbits in North America. 



Although the commonest of Noi'th American mammals, yet within compara- 

 tively few years they were represented in collections by extremely scanty and 

 imperfect material. Ninety-seven species and subspecies are recognized, 2 or 3 

 of which in the light of more satisfactory material may prove unworthy of re- 

 tention in the list. In the preparation of this monograph, more than 5,500 

 specimens were examined, of which about 3,.500 were skins with skulls, the 

 others odd skulls. Representatives of every species and subspecies recognized 

 are said to have been examined. The revision includes a key to the species and 

 subspecies, maps illustrating their distribution, and a bibliography of the more 

 important papers. 



[The introduction of the American robin into England] (Nature [London'\. 

 81 (1909). No. 2078. p. 26"'/).— An attempt is being made near Guildford, in Sur- 

 rey, to acclimatize Merula migratoria. 



Index-catalogue of medical and veterinary zoology, C. W. Stiles and A. 

 Hassall (U. 8. Dept. Agr., Bur. Anim. Indus. Bill. 39, pts. 24, pp. 1807-1893; 

 25, pp. 1895-1979). — Part 25 includes titles arranged by authors alphabetically 

 from R to Rizzo, and part 20, those from Roack to Rzewuski. 



Zoological yearbook, 1908, P. Mayer (Zool. Jahresder., 1908, pp. VIII + 

 235+31). — Bibliographical lists are given, also summaries of the more im- 

 portant literature issued during 1908 relating to the . variods groups of the 

 animal kingdom. 



Our insect friends and enemies, J. B. Smith (Philadelphia and London, 

 1909, pp. 314, pi. 1, figs. 121). — In this work the author discusses the relations 

 of insects to plants as benefactors and as destroyers, to each other, to the 

 animals that feed on them, to weather and diseases that affect them, to other 

 animals, to man as benefactors and as carriers of diseases, to the household, and 



