195 



Gram (E.) Ronnebaermollet. [Argyresthia conjugella.]—Gartner- 

 Itdcnde. Copenhagen, xxxv, 1919, pp. 303-305. 



A serious outbreak of Argyresthia conjugella on apples in Denmark 

 IS recorded ni 1919. Considerable damage was also done to the 

 service tree, the favourite food-plant of this moth. 



Jensen-Haarup (A. C). Cikader {llomovieiB).~Danmarks Fauna 

 Nr., 24, Copenhagen. 1920, 190 pp., 79 figs. 



This is a systematic survey of the Homoptera of Denmark It 

 deals with 226 species, and is furnished with many instructive 

 illustrations. 



MicHELiNi (G.). La Fillossera della Vite. [The Vine Phylloxera]- 

 Lonsighere dell'Agric, Turin, ix, no. 1, January 192f pp 8-16 

 7 figs. ^^ 



A popular account is given of the various forms of Phylloxera 

 vastatnx, the damage it does, and the measures adopted against it. 



V Stahel (G.). Een wild Cacaobosch aan de Mamaboen-kreek (Boven- 



Coppename). [A wild Cacao Wood on the Mamaboen Creek 

 Upper Copename.]— Reprint from De Indische Mercnur {sine 

 loco], 24th September 1920, 12 pp., 9 figs. [Received 12th 

 February 1921.] 



• ^1^^ discovery in April 1920 of an area of wild cacao is recorded 

 m Dutch Guiana. Even if Indians had introduced the plant 

 this must have taken place a very long time ago ; otherwise the 

 occurrence of such extensive areas covered with old trees cannot be 

 accounted for. 



According to Mr. A. Reyne no traces were found of the pest re- 

 sembling //^'/o/^e/^/s [Monalonion] occurring in Brazil, of the cacao beetle 

 ^teirastomadepressum, or of the cacao thrips [Heliothrips riihrocinctus] 

 The absence of the thrips is remarkable, as it has been found in 

 the neighbourhood on Psidium polycarpon. The only injury noticed 

 was of an occasional character and due to leaf-eating beetles and 

 caterpillars. 



Krahe (J. A.). Lehrbuch der rationellen Korbweidenkultur. [Text- 

 book of rational Basket-Willow Cultivation.]— Z.»;i6//r" a L 

 Verlag Gebr. Steffen, 6th edn., price 7 marks. (Notice in 

 Zeitschr. Pflanzenkr., Stuttgart, xxx, no. 8, 1920, p. 284.) 



In the section on insect pests of willow it is stated that ants are 

 injurious owing to the construction of nests and the fact that they 

 foster Aphids. Bostrychus is only a secondary pest. The larvae of 

 various Lamellicorn beetles attack the roots, and cause much harm 

 Leaf-beetles of the genera Phyllodecta {Phratora) and Melasoma 

 [Una) do very considerable injury. Lepidopterous pests are repre- 

 sented by Stilpnotia salicis, L., and Earias chlorana. L. Tibula 

 pratensis. L., is sometimes harmful. 



