XXViil PROCEEDINGS OF THE ROYAL HORTICULTURAL SOCIETY. 



only be proved by experiment. It was thought that if the bulbs 

 were subjected to vaporised creosote it might prove effective. 

 Dr. Miiller mentioned that oil of cloves and oil of cassia used as 

 a watery solution would probably prove capable of destroying the 

 acari, as they are powerful antiseptics. 



Carnations attached by Anthomyiidce. — Specimens were re- 

 ceived from Mr. Perry, of Tottenham, of the well-known parasite 

 Hylemyia nigrescens, which attacks the crowns, nodes, and basal 

 part of the stem. 



Lettuce Mildew. — The Lettuces grown in the market gardens 

 near Ham, Twickenham, &c, are much damaged this year by 

 Bremia lactucaB, formerly known as Peronospora gangliformis, 

 Berk., described by Rev. M. J. Berkeley in 1846 as Botrytis 

 {Journ. Hort. Soc, i., t. 4). References to the literature are 

 given in Cooke's " Handbook of British Fungi." Mr. W. G. Smith 

 devotes a chapter to this parasite (chap. 34, " Diseases of Field 

 and Garden Crops "), in which he observes that "when frame 

 Lettuces are attacked, a good plan for the destruction of the 

 fungus is to give as much air as practicable, and if possible to 

 leave the frames open for at least a part of one cold night, as a 

 ■short exposure to cold or slightly frosty air will not materially 

 hurt the young Lettuces. As resting spores are found in old 

 rotting stems, all decayed plants should of course be burnt, 

 especially old stumps, as in them the resting spores of the mildew 

 often exist in myriads." 



Primula Forbesi. — A growing and flowering plant was again 

 exhibited. This species was shown by M. Vilmorin on October 6, 

 1891, when specimens were presented to Kew and Chiswick. 

 At both establishments the plants are in a flourishing condition. 



Schizocodon soldanelloides. — A plant was exhibited by Captain 

 Torrens, Poaston Manor, Hayes Common, Kent. It is allied to 

 Shortia, both belonging to the order Diapenses. A vote of 

 thanks was unanimously given to the exhibitor. 



Angrcecum sesquipedale, Monstrous. — Mr. C. Whitfield King, 

 Ipswich, sent a specimen in which one of the lateral petals was 

 spurred, making a supernumerary labellum. 



