200 



Hodge (C. F.). The Mosquito-Malaria Problem in Florida. — Florida 

 Entom., Gainesville, iv, no. 1, July 1920, pp. 1-6. 



The importance of paying more attention to tlie domestic breeding 

 places of mosquitos such as rain-tubs, etc., is emphasised. It is con- 

 sidered that if such places were rendered harmless by individual 

 enterprise, mosquitos could be effectively held in check by the existing 

 natural enemies in Florida. 



The only way of attracting the attention of the public to the im- 

 portance of such measures is to provide adequate and universal science 

 lessons in every school in Florida. 



Imes (M.). Hog Lice and Hog Mange. Methods of Control and 

 Eradication. — U.S. Dejjt. Agric, Washington, B.C., Farmers' 

 Bull. 1085, May 1920, 28 pp., 12 figs. [Received 11th September 

 1920.] 



The parasites of pigs here dealt with are Haematopinus suis, Sarcoptes 

 scabiei suis (causing sarcoptic or common mange) and Demodex follicn- 

 lorum suis (causing demodectic or follicular mange). There are five 

 methods of applying treatment ; hand apphcations, spraying, rubbing 

 posts, medicated wallows, and dipping. Hand applications may be 

 made with crude petroleum, cotton-seed oil and kerosene in equal 

 parts, or kerosene and lard, half a U.S. pint to a pound. Spraying is 

 effective if thoroughly carried out, but dipping with the same materials 

 is usually more economical and more successful. Rubbing posts 

 have already been noticed [R.A.E., B, v, 75 ; vi, 94]. Shallow concrete 

 wallows, with a layer of crude petroleum floating on the water, and 

 shaded from the sun, are effective in hot weather. The wallow should 

 not be kept medicated continually, but only at intervals of a week or 

 ten days, and it should not be medicated till the pigs have become 

 used to it. 



Crude petroleum also makes the most effective dip — in fact the 

 only one that will eradicate both lice and mange with one dipping. 

 Lime-sulphur, coal-tar-creosote, and arsenical dips may also be used, 

 if desirable, but they involve much greater expenditure of time and 

 labour. 



Instructions are given for making up the various dips, and also 

 for constructing dipping plants, wallows, and rubbing posts, cal- 

 culating the cubical contents of tanks, etc. 



Lahille (F.). Enumeracion sistematica de los Pediculidos, Malofagos, 

 Pulicidos, Linguatulidos y Acaros (la Parte) encontrados en la 

 Republica Argentina con una Nota sobre un Especie de Piojo 

 de las Ovejas. [Systematic Enumeration of the Pediculids 

 Mallophaga, Pulicids, Linguatulids and Acarids (1st Part) found 

 in the Argentine Republic, with a Note on a Species of Sheep 

 Louse.] — Minist. Agric. Nac., Buenos Aires, 1920, 41 pp., 4 plates. 

 Among the parasites enumerated in this list as occurring in Argen- 

 tina, a special list is given of the Mallophaga infesting birds, comprising 

 14 genera and some 159 species, and it is thought probable that many 

 more occur in the country. 



Notes are also given on the sheep-louse, Linognathus pedalis, Osb., 

 which 'is reported as very abundant in the Province of Buenos Aires. 



