412 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 1 



Revie^vs 



Arsenical Poisoning of Fruit Trees, by William T. Headden, 

 Colorado Agricultural Experiment Station. Bulletin 131, 1908, p. 1-28. 



This bulletiu is of particular interest to entomologists, since the writer sub- 

 mits evidence showing that under certain conditions at least, repeated applica- 

 tions of arsenical poisons may result in serious injurj- to the trunks and roots 

 of fruit trees. It is probable that the injuries from arsenical applications 

 recorded by the author have been caused, in large measure, by the alkaline 

 elements of Colorado soils reacting upon the arsenical compounds and produc- 

 ing combinations deleterious to the welfare of the trees ; nevertheless the sub- 

 ject is one of much importance to all economic entomologists and there should 

 be a careful watch for the appearance of any such trouble in other sections 

 of the United States. 



The Catalpa Midge, b}' H. A. Gossard, Ohio Agricultural Experi- 

 ment Station, Bulletin 197, 1908, p. 1-12. 



The life history and work of Ceeidomtjia cataJpae Comst. is discussed in 

 detail. The author recommends cultivation, fei'tilization and close planting 

 in order to overcome in a large measure injuries by this midge. He provi- 

 sionally advises the application of kainit in May and June for the destruction 

 of the larvse in the soil. The value of this bulletin is greatly increased by an 

 excellent series of original illustrations. 



The California Grape Root Worm, by H. J. Quayle, California 

 Agricultural Experiment Station, Bulletin 195, 1908, p. 1-26. 



This is a detailed account of the European Adoxtts obscurtts Linn., a species 

 working in a very similar manner to the eastern grape root worm, Fidia viti- 

 cida Walsh. The life history and habits of this insect are given in detail and 

 the value of the publication is much enhanced by a fine series of original 

 illustrations. Remedial measures advised by the author are deep cultivation 

 for the destruction of pupae, the application of a strong arsenical spray for 

 destroj'ing the beetles or the employment of a beetle catcher. 



The Grape Leaf Hopper, by H. J. Quayle, California Agricultural 

 Experiment Station, Bulletin 198, 1908, p. 177-216. 



This is an extended biologic and economic discussion of Ti/phlocyha comes 

 Say, illustrated by an excellent series of original figures. The author con- 

 cludes that the most satisfactory method of controlling this species is by the 

 use of a screen cage, a wire covered device especially adapted for the capture 

 of leaf hoppers. 



Fumigation for the Citrus White Fly as Adapted to Florida Con- 

 ditions, by A. W. ^Morrill, U. S. Department of Agriculture, Bur. 

 Ent. Bulletin 76, p. 1-73. 



This bulletin gives the results obtained from two winters of experimentation 

 on the white fly in Florida. There is an extended discussion of the conditions 

 and chemicals necessary to obtain good results. The description of the equip- 

 ment and its method of operation is exceedingly helpful. The large amount of 



