491 



Oviposition occurs in September in fields that are generally drj/ and 

 exposed to the sun, and the eggs hatch about May or June. Remedial 

 measures in Bulgaria are usually organised by the agronomists and 

 those holding state professorships in agriculture. The usual method 

 adopted is the collection of adults. For this purpose persons armed 

 with branches form concentric circles, which are gradually contracted 

 until the locusts are collected in a suitable area for crushing. Eggs 

 may be destroyed by spreading straw over the field and burning it. 

 In the experiment described a layer of straw 12 to 20 in. thick was used. 



GiLLiN ( — ) . La Lutte centre les Sauterelles dans la Tunisie. — Ihid.. 

 pp. 121-122. 



Tunisia is frequently invaded by the locust, Schisfocerca peregrina. 

 By the decree of 14th February 1916 the obligatory measures for the 

 destruction of locusts in Tunisia are defined, the Agricultural Adminis- 

 tration Service being responsible for the organisation of such measures. 

 All owners or tenants of land are required to report any appearance 

 of the locusts to the local authorities and to undertake without delaj^ 

 the remedial measures prescribed by them. The measures advocated 

 are destruction of winged forms by crushing, burying, burning and 

 collecting ; the destruction of eggs by crushing the females during 

 the oviposition period and the extraction of eggs from the soil by 

 special instruments ; and the destruction of the hoppers by the same 

 means as applied against the winged forms and also by means of 

 insecticides, etc. The usual insecticides are 3 to 5 lb. of soap to 10 gals. 

 of water ; 10 lb. of cresyl to 10 gals, of water ; or 10 to 20 lb. of paraffin 

 and 2 to 4 lb. of soap to 10 gals, of water. 



By means of co-ordinated action the results obtained have been 

 satisfactory, but it is suggested that the organisation would be 

 improved by entrusting research work to the Zoological and Entomo- 

 logical Station at the Colonial School of Agriculture in Tunis and the 

 protection service to the Technical Bureau of the Agricultural 

 Administration. 



Vayssiere (P.). Precedes de Lutte utilises en Crau centre le Criquet 

 Marocain en 1^2Q.~Hid., pp. 123-126. 



The measures here described against locusts [Dociostaurus maroc- 

 canus, Thunb.] in the Crau region in 1920 have alreadv been noticed 

 [i?..4.£:., A, ix, 403]. 



DuFRENOY (J.). Les Charangons des Myrtilles et des Arbousiers. 

 Contribution a I'Etude du Peuplement des Ericac^es. — Rev. Zool. 

 Agric. & App., Bordeaux, xx, no. 5, May 1921, pp. 38-39. 



In consequence of the special biochemical characters of Ericaceae, 

 the pests attacking them are few in number and are usually peculiar 

 to them. The genus Strophosomus includes certain cosmopolitan 

 species, some of which have been recorded on heaths, e.g., S. retiisns 

 on Erica sp. Others have been found on very different Ericaceous 

 plants ; S. retusus, Marsh., together with Eusomus (Polvdrosiis) 

 ovuhim, devoured the lea\'es of Vaccinium myrtillus at Bareges (Hautes- 

 Pyrenees), while neighbouring Arbutus uva-ttrsi, which has thick 

 leaves, was apparently not attacked. 5. retusus is found in numbers 

 on the young terminal shoots of A. unedo and causes the formation 

 of supplementary shoots. 



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