402 



by the female Acarids. It was further ascertained that larvae of 

 various insects were also attacked, if soft-skinned. 0. brunneus has 

 one generation a year, while from June to October alone P. ventricosus 

 was observed to produce six, so that the destruction of the former 

 would be assured were it not able to found colonies at a distance from 

 its enemy, which does not possess the same migratory powers. A 

 description of both species is given. 



CarrasquillaH(T.). Enfermedades y Enemigos del Cacao. [Diseases 

 and Pests of Cacao.] — Rev. Agricola, Bogota, ii, nos. 1-2, January- 

 Febrero 1916, pp. 6-24, 90-103. [Received 7th July 1916.] 



This paper deals in a popular form with the local diseases and pests 

 of cacao, no scientific names being given. 



LoTRiONTE (G.). Consign pratici sul mezzi per combattere la 

 fumaggine degli olivi e di altri alberi. [Practical advice on the 

 means for combating sooty fungus of the olive and other trees.] 

 — Cattedra Ambulante d'Agricullum, Rome, 1916, 11 pp. 



On the olive the presence of the sooty fungus is closely related to 

 that of Coccids, such as Saissetia {Lecanium) oleae, Phili'p'pia oleae, etc., 

 while Coccus hesjyeridum and Icerya purchasi are found with it on 

 citrus and other plants. The Lotrionte formula for a combined 

 insecticide and fungicide is : Soft soap, 4-6 lb. ; finest powdered 

 sulphur (as used for vines), 10 lb. ; commercial creoUn, 2-3 lb. ; water, 

 to make up to 20 gals. This gives the best results. It is prepared by 

 dissolving the soap in about 4-6 gals, of water and then adding the 

 sulphur, little by little, to the soap solution. When about to spray, 

 the creohn is added and the remainder of the water is mixed in. It is 

 very important to stir the spray liquid before and during spraying, 

 which should be done in fine weather. 



Destruction de la pyrale. [The destruction of the Vine Py rails.]' — 

 La Vie Agric, Paris, vi, no. 30, 22nd July 1916, p. 66. 



A simple method of destroying Sparganothis pilleriana consists of 

 sprinkling the vines with sifted wood ashes. The ash contains potash, 

 and either kills the insect or causes it to migrate. The apphcation 

 should be made at the flowering period. There is no risk of scorching. 



Dudgeon (G. C). The Boll Worm in Egypt. — Reprint from Trans. 

 3rd International Congress. Trop. Agric, London, 1916, pp. 1-34, 

 2 plates. [Received 26th July 1916.] 



The plants attacked by Earias insulana, Boisd., in Egypt are 

 cotton and Hibiscus spp. Eggs are deposited on the former on the 

 bolls, terminal buds, and perhaps on the squares, also on flower buds, 

 petioles, leaves, or in the leaf axils ; on the latter they are placed on 

 the flower buds, fruit or in the leaf axils. The duration of the egg- 

 laying period and the number of eggs deposited varies with the season. 

 In September a female kept in captivity deposited 233 eggs in five 

 days ; another in December laid 99 in 19 days. The duration of the 

 adult stage in the female is more than a month. The incubation period 



