223 



of Clysia ambiguella and Polychrosis botrana were very small, though 

 in another vineyard not far away they were abundant. In the other 

 vineyard, S. pilleriana was not found on the bark of the trunk, but 

 only on the branches ; on the other hand, the remains of cocoons of 

 C. ambiguella were found on the trunk and on the branches, respec- 

 tively, in the ratio of 11 : 3. These figures show the necessity of 

 treating the trunks against C. ambiguella. 



Trofimenko (M.) & Obiedoff (S.). Le Vin des Raisins trait6s aux 

 Ars6niat3S contre la 2"^® G6n6ration des Insectes. [Wine from 

 grapes treated with arsenates against the second generation of 

 insects.] — Progres Agric. et Vitic, Montpellier, xxxiii, no. 14, 

 2nd April 1916, pp. 331-333. 



As arsenical sprays have proved to be very effective against the 

 second generation of Clysia ambiguella and Polychrosis botrana, experi- 

 ments were made by the authors to ascertain whether arsenic was 

 present in the wine made from grapes which had been treated in this 

 way. Fruit which showed a continuous layer of arsenical matter over 

 the berry and stalk, and which had not been subjected to rain between 

 the time of application of the spray and the time of picking, was used. 

 As a result, it was found that white wine was entirely free from arsenic, 

 while red wine showed traces (0"0002 gram per litre). The lesidue 

 could be used for the extraction of tartar, the washing being sufficient 

 to carry away the arsenate. The traces of arsenic contained in red 

 wine were not sufficient to prohibit its consumption. Further experi- 

 ments in this connection are being carried on. 



Passy (P.). A propos de la destruction des guepes. [The destruction 

 of wasps.] — V Apiculteur , Paris, Ix, nos. 1-2, January-February 

 1916, pp. 17-18. [Received 15th April 1916.] 



Carbon bisulphide is stated to be very effective against colonies of 

 wasps. If 1 1 to 2 oz. be poured into the entrance of the nest, the 

 death of the insects occurs after a few hours, owing to the fumes being 

 heavier than air. The operation is best carried out in the evening, 

 but may be done by day if necessary. 



Lecaillon (M. a.). Sur I'existence de deux generations annuelles 

 Chez la Gal6ruque de I'Orme {Galeruca luteola, F. Muller), et sur 

 la maniere dont elles se succfedent. [On the existence of two 

 annual generations in the Galeruca of the elm {Galeruca 

 luteola, F. Muller), and on the manner in which they follow one 

 another.] — C. R. hebdom. Ac. Sci., Paris, clxii, no. 13, 27th March 

 1916, pp. 481-484. 



In the neighbourhood of Toulouse the eggs of Galerucella {Galeruca} 

 luteola are laid on the leaves of elm from the beginning of May to the 

 beginning of September. Two generations occur annually, the first 

 in May and June, the second in July and August. The duration of 

 the egg-laying period of a single female does not exceed six weeks. 

 Larvae from the first generation of adults were observed to emerge 

 on 15th June 1914 ; the pupal stage was reached on 3rd July 1914, 

 and adults emerged 10 days later. Egg-laying by the second generation 



