ECONOMIC ZOOLOGY ENTOMOLOGY. 549 



pp. .',; Prog. Acn\ at Tit. (Ed. VEst-Centre), 33 (1912), No. 20, pp. G13-615; 

 Jour. Agr. Prat., n. scr., 23 {1912), No. 21, pp. 665, 666).— The authors have 

 studied various meaus of augmenting the efficiency of fungicides and insecti- 

 cides by increasing their wetting power. Saix)nin, soap, castor oil, and gelatin 

 were added to the mixtures, and their covering power determined. 



The authors conclude that the wetting power of the solution, so far as it 

 relates to plants, depends upon the facility with which the solution forms 

 liquid films and the resistance of these films to superficial tension. The deter- 

 mined wetting power of a solution for one plant or plant organ does not neces- 

 sarily imply that it will have the same ability to wet other bodies or other 

 organs. 



In the authors' experiments the best results were obtained with gelatin added 

 at the rate of from 10 to 50 gm. per hectoliter of fungicide. This proved much 

 better and cheaper than any of the other substances tested. All forms of gelatin 

 are thought not equally desirable, esi^ecially when used with Bordeaux mixture 

 and Burgundy mixture. This matter is to be given further study. 



A modified copper acetate fungicide is recommended, made by the following 

 formula : Water 100 liters, neutral copper acetate 1 kg., and gelatin from 10 

 to 20 gm. The copper acetate is dissolved in 100 liters of water, and the gelatin 

 is dissolved in hot water, after which the solution containing the gelatin is 

 poured into the copper solution, thoroughly stirred, and applied. 



In the reprint it is claimed that practically all forms of gelatin are equally 

 adapted to use in connection with the above formula. 



ECONOMIC ZOOLOGY— ENTOMOLOGY. 



Report of an expedition to Laysan Island in 1911, under the joint aus- 

 pices of the United States Department of Agriculture and the University of 

 Iowa (U. 8. Dept. Agr., Bur. Biol. Survey Bui. ff2, pp. 30, pis. 9, fig. i).— This 

 report consists of 2 parts. 



Report on conditions on the Hawaiian bird reservation with list of the birds 

 found on Laysan, H. R. Dill (pp. 7-23). — This is a report of an expedition sent 

 to Laysan, the largest and most important island of the Hawaian Islands 

 Reservation, to ascertain the present condition of the bird rookeries and to 

 collect a series of birds for a museum exhibit. A period of about 2 months 

 during April, May, and June was spent upon the island. A brief description 

 is first given of the Hawaiian Islands Reservation, with notes on seals, intro- 

 duced rabbits and guinea pigs, insect pests, and birds as seed carriers. Then 

 follows a brief narrative of the expedition and an extended annotated list of 

 birds of Laysan, together with an island bird census. 



Report on conditions on Laysan, with recoinmendations for protecting the 

 Hawaiian Islands Reservation, W. A. Bryan (pp. 24-30). — This report consists 

 of a comparison of conditions in 1903 and 1911 and recommendations for the 

 future protection of the reservation. 



Our mid-Pacific bird reservation, H. W. Henshaw (U. S. Dept. Agr. Year- 

 hook 1911, pp. 155-16-'i, pis. 2, figs. 2). — This paper is largely based on the above 

 noted bulletin. 



Handbook of birds of eastern North America, F. M. Chapman (Neio York 

 ami London, 1912, rev. ed., pp. XXIX+530, pis. 24, figs. i36).— Much of this 

 revised edition is said to have been rewritten. The nomenclature is that of the 

 1910 edition of the A. O. U. Check List. 



Michigan bird life, W. B. Bakrows (Michigan Agr. Col. Spec. Bui., 1912, pp. 

 XIV+822, pis. 70, figs. 152).— A list of all the birds (336 species and sub- 

 species) known to occur in Michigan, together with an account of the life 

 history of each species and special reference to its relation to agriculture. 



