231 



Oberstein' ( — ). Chortophila cilicrura, Rond., und Thereva spec, 

 zwei neue Roggenschadlinge in Schlesien [Chortophila cilicrura 

 and Thereva sp., two new Pests of Rye in Silesia].— Zp/foc/ir. /. 

 Pjianzenkr., Stuttgart, xxvi, no. 5, 30tli July 1916, pp. 277-280. 

 [Received 30th March 1917.] 



This paper records the larvae of the Anthomyid, Chortophila 

 cilicrura, Rond., and of Thereva sp., as injuring rye in Silesia. 



ScHOEVERS (T. A. C). lets over bestrijding van schadelijk insekten 

 door zwammen en bakterien. [The Control of injurious Insects 

 by Fungi and Bacteria.] — Tijdschr. over Plant mziekt en, Wagenin- 

 gen, xxii, no. 6, December 1916, pp. 131-202. 



This paper is a valuable compilation of matter already published 

 relating to the control of injurious insects by fungi and bacteria [see 

 also this Review, Ser. A, iv, p. 301]. It includes a bibliography of 

 255 references. 



Como destruir os Grillos-toupeira, [The Destruction of Mole-crickets.] 

 — Chacaras e Quintaes, Rio de Janeiro, xv, no 1, 15th January 

 1917, pp. 15-16. 



In the State of Ceara (Brazil) young sugar-cane is severely injured by 

 Gryllotalpa tetradactyla, Perty. The use of trap-pots and fumigation 

 with carbon bisulphide are the measures recommended against it. 



OoNCEiglo (J.). As Salivas [Atta sexdens L.) e sua Extinccao. [Atta 

 sexdens and its Destruction.] — Chacaras e Quintaes, Riode Janeiro, 

 XV, no. 1, 15th January 1917, pp. 30-38, 4 figs. 



A description is given in this article of a new fumigator for use 

 against Atta sexdens, L., which is a serious pest in Brazil. This 

 apparatus is easily carried and worked by one person. The fumigant, 

 which contains sulphide of arsenic, is made up in the form of a pierced 

 tablet fitting on to a skewer which is thrust into the ground near the 

 main gallery of the ant's nest. Over the fumigant is placed a bell 

 with sharp edges which is pressed into the ground. At the top of the 

 bell is a glazed aperture, permitting the progress of combustion being 

 watched, and a nozzle to which a piece of flexible tubing is attached. 

 The other end of the tubing is fastened to a circular metal box con- 

 taining a fan which the operator works by means of a handle. For 

 use the ground around the main gallery is levelled to accomodate the 

 bell, the skewer is placed in position and the fumigant fixed on it 

 and lighted. Each tablet produces about 1,600 cubic feet of a yellow, 

 asphyxiating vapour, about three times as heavy as air ; this quantity 

 is sufficient for a medium-sized nest, though for large ones two or three 

 tablets are required. Immediately combustion is completed the bell 

 must be removed and the hole closed with earth. Within the nest, 

 the vapour condenses and leaves a poisonous deposit everywhere. 

 The tablets may also be used for fumigating trees, enclosed in a tent 

 for the purpose. 



