ENTOMOLOGY. 489 



as new under the name Pcfkinsiella saccharirida. This insect was first oliserved in 

 1900 and has since become much more numerous and injurious. The species is 

 native to Hawaii and differs from related species in AustraUa and other tropical 

 coimtries. Detailed notes are given on the appearance, habits, and life history of 

 this insect. When the leaf hopper was present in large numbers the midrib and 

 sheath of the leaf became red in spots or almost uniformly, and since the insect 

 secretes honeydew this substance becomes covered with a fungus which gives a 

 peculiar appearance to the affected canes. Certain varieties of cane appear to be 

 more resistant than others. 



A- large number of natural enemies of this pest are noted, including parasitic and 

 predaceous insects, spiders, and fungi. The author believes that the repression of 

 this pest must be brought about by encouraging its natural enemies and introducing 

 other beneficial species from foreign countries. The successful use of artificial insecti- 

 cides is believed to be impracticable. Experiments were made by C. F. Eckart, dur- 

 ing which the effect of corrosive sublimate, hydrocyanic-acid gas, and carbolic acid 

 upon the cane-leaf hopper were tested. The immersion of infested sections of sugar 

 cane in solutions of corrosive sul)limate and carbolic acid, varying from 1 to 2 per 

 cent, and for periods ranging from 3 to 6 hours, showed that the solutions of carbolic 

 acid were ineffective in destroying the eggs of the insect, while corrosive sublimate 

 solutions exhibited considerable effectiveness. 



Fumigation with hydrocyanic-acid gas was sufficient to destroy the eggs when 

 infested cane sections were treated for a period of 6 hours or more. The treatment 

 with this gas had a marked effect on the vitality of the cane, while corrosive sublimate 

 apparently had no injurious influence except when used in strong solutions. 



The Mexican cotton-boll weevil, L. O. Howard {Science, n. ser., 18 {1903), Xo. 

 465, p. 693). — Notes are given on the investigation of this insect which was begun by 

 the Division of Entomology in 1894, and which has led to the discovery of a method 

 by which a fair crop of cotton can be raised under conditions of infestation by this 

 insect. 



Cutworms, J. R. Anderson {Dept. Agr. British Columbia, Bui. 9, pp. S). — Descrip- 

 tive, economic, and biological notes on Peridroma saucia. In combating this insect 

 the use of poisoned bait is recommended. The cutworms may be prevented from 

 climbing into fruit trees by the use of mechanical obstructions. 



The codling moth regulations, G. Qcinn {Jour. Agr. and Ind. South Australia, 

 7 {1903), Xo. 2, pp. 89-92). — Circulars of information relating to the best methods 

 of controlling and eradicating codling moth have been distributed to various aj^ple 

 growers throughout South Australia and requests were made for information concern- 

 ing the results obtained b\' the application of these methods. A large percentage of 

 apple growers were found to be oiii)Osed to compulsory spraying, in favor of band- 

 ing, and opposed to unrestricted sale of infested fruit. 



The moth book, W. J. Holland {Xetv York: Douhleday, Page & Co., 1903, pp. 

 XXIV-{-479, pis. 4^, Jigs. 263). — This volume is a companion to the author's butter- 

 fly book and is intended to cover the subject of moths in the same manner. No 

 attempt is made to list all of the species of moths occurring in North America, but the 

 common representatives of the more important genera are briefly described and 

 notes are given on their habits and life history. The identification of the species 

 mentioned in the volume is facilitated by the numerous illustrations. Special chap- 

 ters are presented on the life history and anatomy of moths; capture, preparation, 

 and preservation of specimens; classification of moths; and books relating to moths 

 of Nt)rth America. 



Aquatic insects in New York, J. G. Needham et al. {Nen^ York State Mus. Bui. 

 68, ]>p. 197-517, pis. 52, Jigs. 26). — This bulletin constitutes a compendium of the 

 general study of aquatic insects in New York, conducted under the direction of 

 E. P. Felt. The subjects discussed in the bulletin include an account of the station 



