SCIENTIFIC COMMITTEE, NOVEMBER 21. 



ccxix 



Mr. Ledger has raised a hybrid from C. Barklyi, Hook, f., fertihzed, in 

 1909, by pollen of this species. 



Certificate of Appreciation. — Mr. J. Gurney Fowler showed 

 Odo7itocidiu7n x Fowlerianum raised between Odontoglossuvi cirrkosum 

 and Oncidium Forhesii. The sepals and petals broadly lanceolate, 

 primrose yellow, barred with red-brown; lip yellow, w^ith chestnnt- 

 red spots. A Certificate of Appreciation was recommended to Mr. 

 Fowler for achieving this new bigeneric cross. 



Scientific Committee, Novembee 21, 1911. 



Mr. E. A. Bowles, M.A., F.L.S., F.E.S., in the Chair, and 

 eleven members present. 



Raspberry- Beetles. — The Eev. Canon Fowler showed specimens of 

 the raspberry beetle, Byturus tomentosus, which feeds in the flowers of 

 Easpberry, Blackberry, Loganberry, and Strawberry, remarking that in 

 all probability the pest pupates in the soil, and not so much in old 

 stems, &c. He considered that if some measure of reaching the pest 

 in the soil could be devised it would prove very beneficial, but after 

 some discussion the committee thought that none of the methods at 

 present economically available would be entirely suitable in the present 

 instance. It was remarked that some success had been attained in 

 dealing with this pest by shaking the canes over tarred boards and by 

 spraying with lead arsenate during the time the plants were in bloom. 



Uncommon fruits. — A. Bayldon, Esq., sent from Dawlish, 

 Devon, a bunch of about 16 fruits (on one branch) of Mandevilla 

 suaveolens, and a pair which measured 20 inches in length; a bunch 

 of seed pods of Wistaria japonica from a standard on its own roots 

 which bore several dozen fruits; W. multijuga was also fruiting in the 

 same garden, and had produced racemes 30 inches to 36 inches in 

 length; a spray of many fruits of Cornus capitata {Benthamia fragifera) 

 from a very old tree 26 feet in height. The seeds of Cornus capitata 

 are picked from the fallen fruit by the blackbirds and dropped about 

 the grounds. Mr. E. Shafto Adair, of Clauville, Minehead, Somerset, 

 sent two excellent fruits of the common pomegranate, perfectly ripe, 

 and open to show the seeds, picked from a plant growing on a south 

 wall. 



Streak disease in Potato. — Mr. A. S. Horne, B.Sc, of the Wisley 

 Labor,atory, exhibited specimens in illustration of the following notes : 

 In 1910 a sample of seed potatos of the variety ' Duke of York ' 

 was obtained from a dealer in the North of England. When the 

 tubers were examined about 20 per cent, of them were found 

 to be affected with streak disease. Several diseased tubers, how- 

 ever, were not included in the estimate. These were rotten in the 

 middle, and the flesh was more or less excavated, the cavity or cavities 

 being enclosed by diseased tissue. It was supposed at the time that 

 this condition was due to some other cause. During November 1911, 



