501 



DA Matta (A. A ). Larvas de Lepidoptero perjudiciaes ao Genero 

 Citrus. [A Lepidopterous Larva injurious to the Genus Citrus.] 

 — Anales Zool. Aplicada, Santiago de Chile, iv, no. 3, 

 30th September 1917, pp. 47-51, 1 fig. [Received 5th September 

 1918.] 



This paper deals with the butterfly, Papilio idaeus, ¥., infesting 

 citrus plants m Brazil. The caterpillars are gregarious and are easily 

 fomid on Aurantiaceae, especially orange and lemon trees. The 

 eggs are attached to the leaves in groups and the caterpillars hatch 

 out in 8-10 days. In the final stage, about 20-25 days later, they 

 abandon their gregarious habit. The pupal stage lasts 18-22 days. 

 Spraying with a petroleum soap emulsion is advised when the cater- 

 pillars are young. At a later date they must be collected. All leaves 

 bearing eggs must be picked and destroyed. 



LiZER (C). El Polisulfuro de Calcio. [Calcium Polysulphide.]— 

 Anales Zool. Aplicada, Santiago de Chile, iv, no. 3, 30th 

 September 1917, pp. 51-52. [Received 5th September 1918.] 



The follo\^dng data are given regarding the preparation of calcium 

 polysulphide spray solution : — To obtain the maximum of polysulphide 

 the mixture must not be boiled for more than 60 minutes ; 50 to 60 

 minutes is the correct time. The maximum of CaS.^O.^ occurs in 

 30-45 minutes. Density is no guide to the percentage of polysulphide. 

 The olive green colour of the residue from the lime-sulphur mixture 

 is entirely due to the iron content in the lime. The solution must 

 be used fresh or stored in air-tight containers. Of the three formulae 

 analysed, that of Savastano [see this Revieiv, Ser. A, ii, p. 412] contains 

 most polysulphide, as the proportions of lime and sulphur are most 

 correct. The needle-like crystals that occur in concentrated solutions 

 cannot have the composition alleged by A^an Slyke, Hedges and 

 Bosworth. They are almost certainly an oxygen compound with the 

 addition of water of crystallisation. 



Maki (M.). Taiwansan Kebuka-aburamushi oyobi sono Isshinshu ni 

 tsukite. [The Genus Trichosiphum in Formosa with Descriptions 

 of New Species.] — Taiwan Nojiho [Formosan Agricultural Report]. 

 Formosa, no. 138, 31st May 1918, pp 9-17, 1 plate. 



The author describes four species of Formosan Aphids belonging 

 to the genus Trichosiphum, of which one is new to science, viz.: — 

 Trichosiphum nigrum, Maki, on Quercus formosana ; T. formosanum, 

 Maki, on Psidium guayava, Rhodomyrtus tomentosa, Ficus retusa and 

 F. wightiana ; T. nigrofasciatum, Maki, on Qtiercus serrata, Q. variabilis, 

 and Q. formosana ; and T. lithocarpae, sp. n., on Lithocarpus uraiana. 

 A few remarks on the bionomics of these species are added. 



Abe (Y.). Kinkemushi no Sanji oyobosu Gaidoku. [Injury to 

 Silkworms by Caterpillars of the Gold Tail Moth.] — Sangyo 

 Shimpo [Journal of the Silk Industry], Tokyo, no. 304, 1st 

 July 1918, pp. 890-894. 



In the spring of 1918 the author foimd that silkworms of the fifth 

 instar suddenly lost their appetite, and became inactive and vomited 



