226 



Peluffo (AT). Informe de la Inspeccion realizada a varies Departa- 

 mentos del Interior con Motivo de la Aparicion de una nueva 

 Cochinilla en los Naranjos. [Report of a Tour of Inspection in 

 the Interior, due to the Appearance of a new Coccid on Orange 

 Trees.] — Uruguay: Minist. Indust., Defensa Agricola, Bol. Mens., 

 Montevideo, ii, no. 1, January 1921, pp. 2-5,2 figs. [Received 

 28th February 1922.] 



Saisseiia {Lecanium) oleae, Lepidosaphes beckii {Mytilaspis citricola), 

 Chrysomphalus aonidum and Icerya purchasi were among the scales 

 obser^•ed on orange in the course of these investigations. 



Peluffo (A. T.). Sobre el Par&sito de los Pinares. [On the Pest 

 infesting Pine Forests.] — Uruguay: Minist. Indust., Defensa 

 Agricola, Bol. Mens., Montevideo, ii, no. 1, January 1921, pp. 10-11. 

 [Received 28th February 1922.] 



In the Maldonado district many pines have been killed by Pissodes 

 notatus, and the infestation threatens to spread unless energetic 

 measures are taken without delay. 



El Enemigo del Pulgdn del Manzano. Trabajos para su Aclimatacion. 



[The Enemy of the Apple Aphis. x\cclimatisation Work.]^ 

 Uruguav : Minist. Indust., Defensa Agricola, Bol. Mens., 



Montevideo, ii, no. 2, Februarv 1921, pp. 39-41, 2 figs. [Received 



28th February 1922.] 



All the specimens of Eriosoma lanigerum, Hausm., imported from 

 the United States were dead on arrival, but from this material some 

 living Hymenopterous parasites, believed to be Aphelinus mali, 

 Hald., have been obtained. 



SuNDBERG (R.) & Peluffo (A. T.). La Importacion del Aphelinus 

 mali al Uruguay para combatir el Pulgon del Manzano y algunas 

 Observaciones realizadas sobre la Vida del Inseeto auxiliar. [The 

 Importation of A. mali into Uruguay to combat the Apple Aphis, 

 and some Observations on the Life-history of this Insect Auxiliary.] 

 — Uruguav: Minist. Indust., Defensa Agricola, Bol. Mens., 

 Montevideo, ii, no. 3, March 1921, pp. 65-81, 14 figs. [Received 

 28th February 1922.] 



The negotiations and work which resulted in the introduction of 

 Aphelinus mali into Uruguay from the United States are recorded. 

 This enemy of Eriosoma lanigerum, Hausm., appears to have established 

 itself, its spread being only a question of time. The success of the 

 importation seems to have been due to the low temperature (36° F.) 

 in the storage chamber of the steamer. This permitted some of the 

 parasites to reach Montevideo alive as pupae within the host Aphids. 

 The season was favourable, as the boat left New York on 1 1th December 

 1920 and reached Montevideo on 13th January 1921. 



Some observations were made in the laboratory. The colour of 

 an infested Aphid gradually changes from the usual reddish chestnut 

 until it becomes black a few days before the Chalcid emerges. In 

 captivity specimens that emerged on 4th March and were placed on 

 apple twigs infested with E. lanigerum, died in two or three daj^s. 

 Specimens placed in a Petri dish with a 25 per cent, solution of honey 



