452 EXPERIMENT STATION RECOED. 



Work of the zoological and entomological laboratory, J. Vosseler (Bcr. 

 Land u. Forfiiiv. Dciitsch-Ostafril-a, 3 (1901), No. 3, irp. 108-119).— Among in- 

 jurious locusts Zonoccnis clcgans caused most damage. Sisal was attaclced by 

 a species of Acbrfea. Mention is made of the most important insect pests of 

 cotton, cocoanut, rubber plants, coffee, castor oil plant, fruit trees, cinchona, 

 garden vegetables, etc. 



Greenhouse pests of Maryland, A. B. Gahan {Maryland Sta. Bui. 119, pp. 

 36, figs. 8). — The author aims to give an account of the appearance, habits, and 

 life history of all the important animal pests of greenhouses in Maryland. These 

 include mealy bugs, various scale insects, plant lice, white fly, red spider, 

 thrips, wireworms, snow bugs, and slugs. 



The proi>osed remedies include syringing with water, fumigation, dusting, 

 spraying, and dipping. Directions are given for the preparation and application 

 of insecticides. 



The periodical cicada, C. L. INIaelatt (U. S. Dept. Ayr., Bur. Ent. Bui. 71, 

 pp. 181, pis. 6, figs. 68). — This is a thoi'ough revision of Bulletin 14 of the 

 Division of Entomology (E. S. R., 10, p. 1071). Additional data are given on 

 the habits of the periodical cicada. The broods of the insect have been so re- 

 numbered as to indicate their relationship in time and geographical distribu- 

 tion. An extensive bibliography of the subject is presented (pages 154-169). 



Locust destruction {Natal Agr. Jour, and Min. Rec, 10 {1901), No. 6, pp. 

 609-611). — An intercolonial conference was held by representatives of the 

 British colonies of South Africa. It appears desirable that each colony should 

 seriously attack the locust problem. The best remedy is a sweetened solution 

 of arsenite of soda. Treatment should be applied to the locusts in their 

 nymphal stage. 



The spring grain-aphis or so-called " green bug," -F. M. Webstee ( U. S. 

 Dept. Agr., Bur. Ent. Circ. 93, pp. 18, figs. 1). — The third serious outbreak of 

 Toxoptera graminum in the United States occurred during the last si)ring. The 

 pest is distributed east of longitude 105° and south of latitude 41°, and breeds 

 fi-om sea level to an altitude of 5,000 ft. During warm weather a generation is 

 passed in S days. In ordinary seasons the natural enemies of this pest keep it 

 in check. In addition to cereals the insect has several alternative food plants. 



Tobacco dust had no effect on the aphis, but kerosene emulsion gave good 

 results. Parasites, particularly Lysiphlchiis trilici, overcome the aphis un- 

 aided if weather ctmditions are favorable, but colonization of the parasites is 

 of no avail. Much good may result from plowing and harrowing infested 

 ground, running a surface tire, or from the use of kerosene emulsion. Rotation 

 of crops, better cultural methods, and irrigation have also proved of con- 

 siderable importance in the control of the aphis. 



The chinch bug, F. M. Webstee {U. S. Dept. Agr., Bur. Ent. Bui. 69, pp. 

 95, figs. 19). — This is a revised and enlarged edition of Bulletin 15 of the 

 Division of Entomology (E. S. R., 10, p. 1069). Particular attention has been 

 given to a revision of the remedies for controlling the chinch bug and to the 

 study of its origin and distribution. 



Cotton insects, L. de la Babreda {Bol. Com. Par. Agr., .'/ {1907), No. 2, pp. 

 107-215. pis. 2.'f. map 1). — A series of questions was sent to various planters in 

 Mexico regarding the prevalence, injurious attacks, and means commonly 

 adopted for combating the cotton-boll weevil. The replies received are sum- 

 marized by the author. Considerable attention is given to the work of the 

 Bureau of Entomology of this Department in the control of the boll weevil. 



The sugar-cane leaf -roller, with an account of allied species and natural 

 enemies, O. H. Swezey {Hawaiian Hugar Planters'' ,S7a., Div. Ent. Bui. 5. pp. 

 61, pis. 6, figs. 3). — A technical description is given of Oiniodes accepta and of 



