200 



HoLLRUNG (M.). Der Gattungsname LacJmus (Hem.). [The generic 

 Name Lachnus.] — Entom. Mitt., Berlin, ix, no. 1-3, 19th 

 February 1920, p. 42. 



The erection of the genus Lachnus has been ascribed by some 

 authorities to Ilhger, by others to Burmeister. Del Guercio {Redia, 

 V, p. 176) states that Burmeister recognised the genus, ascribing it 

 to Illiger, as also did Buckton {Monograph, iii, p. 43). The author 

 cannot however find any record of this genus in the works of Illiger. 



LiZER (C). Expedition al Chaco Boliviano, con Objeto de hacer 

 Investigaciones acerca de la Zona permanente 6 de Refugio 

 invernal de la Schistocerca paranensis (Langosta voladora). 



[Expedition to the Bolivian " Chaco," for the purpose of investi- 

 gating the Permanent Zone or Hibernation Quarters of Schistocerca 

 paranensis (the Winged Locust)]. — Bol. Minist. Agric. Nacidn, 

 Buenos Aires, xxiv, no. 1, January-December 1919, pp. 26-70, 

 4 maps. [Received 8th March 1920.] 



A detailed description is given of a six months' journey through 

 the BoHvian Republic undertaken by order of the Argentine 

 Commission for Agricultural Defence for the purpose of investigating 

 the permanently occupied area and hibernation quarters of the 

 migratory locusts of that region. 



Schistocerca paranensis undoubtedly concentrates each year in 

 autumn and winter in a zone following the River Pilcomayo, and 

 situated approximately between the parallels 20° 30' and 24° 30' south 

 latitude and between 58° 30' west of Greenwich and the first slopes of 

 the Andes. From this area the winged locusts migrate in the spring 

 in all directions, though there are also isolated groups that winter 

 beyond these parallels and have not for some reason followed the 

 bulk of the swarm into the principal winter concentration zone. 

 The migrations of S. paranensis extend into Argentina as far as 

 Rawson and the River Chubut and in BoUvia as far as latitude 15° S. 

 The damage done in Bolivia is not to be compared with the devasta- 

 tions that occur in Argentina in the cultivated area. Against those 

 isolated swarms that have not returned to their principal winter 

 quarters, the Commission of Agricultural Defence carries out a winter 

 campaign each year, with very good results, but the same results 

 cannot be expected if such campaigns were attempted in the main 

 hibernation regions of Hmitless woods and deserts with the means 

 that are at present available for control. It is important to discover 

 the complete Ufe-history of this locust, and this is a question of time 

 and constant and careful study. 



Maugini (A.). ProbaWle prossima Invasione di Cavalette in Cirenaica. 

 Preparare in Tempo i Mezzi di Difesa. [A probable impending 

 Invasion of Cyrenaica by Locusts and the Need to prepare 

 Defensive Measures in Time.] — L' Agric. Colon., Florence, xiv,. 

 no. 1, 31st January 1920, pp. 38-49. [Received 8th March 1920.] 



In 1918 large numbers of adult locusts, mostly Tettigonia {Decticus) 

 albifrons, were carried by violent winds into the region around Benghasi, 

 Cjncenaica, and caused serious loss. The eggs that were laid hatched 



