xxxiv PROCEEDINGS OF THE ROYAL HORTICULTURAL SOCIETY. 



perianth-segment branching and entering two instead of a single seg- 

 ment ; so that, excepting one, all the parts of the perianth were doubled. 

 (2) Phaius Humblotii x P. Wallichii, received from Mr. Cookson's 

 collection. One photograph showed the inflorescence, one flower of 

 which had the lower portion of one of the lateral sepals petaloid like a 

 labellum ; the placenta of the ovary next to the position of the labellum 

 was absent. A second flower had no labellum, the lateral sepals were 

 fused, making one wide median sepal, and both the lateral petals were 

 slightly labellate. 



Scientific Committee, January 26, 1904. 

 Dr. Masters, F.R.S., in the Chair, and fourteen members present. 



Codlin-moth in May. — Mr. Saunders, F.L.S., made the following 

 contribution to this subject, discussed at the last meeting: — "I cannot 

 find that more than one brood of the codlin-moth has ever been noticed 

 in England, though two broods are common on the Continent and in 

 America ; and on the other side of the Atlantic even three broods have 

 been known. In this country the moth leaves the chrysalis in May, and 

 lays her eggs very soon afterwards. The caterpillars are hatched in the 

 course of a week or ten days, and remain in the Apple three weeks or a 

 month ; being fully fed, they leave the fruit to fall to the ground, and 

 make their way to the nearest tree stem, and crawl up it until they find a 

 suitable place to pupate in. If they cannot find a tree, a post or paling 

 or even dead leaves will provide them with a shelter. The object in 

 putting bands round the trees is to provide the caterpillars with hiding- 

 places, where they may be found and destroyed. Such bands are not sticky, 

 but are made of folded canvas or sacking, or even hay or straw, and should 

 be put on as soon as any ' windfalls ' are found." 



Maggots in Moss Litter. — Mrs. Horseley sent samples with inquiries. 

 Mr. Saunders reported as follows : — " The grubs found in the moss-litter 

 manure were those of a fly belonging to the genus Bibio, but I cannot 

 tell the name of the species, several of which are very common ; perhaps 

 the one best known is the St. Mark's fly (Bibio Marci), so called from its 

 generally appearing about St. Mark's Day (April 25). These flies are 

 quite black, and are rather more than half an inch in length ; their bodies 

 are rather thin, and the wings are not very transparent ; they measure 

 about 1] inch from tip to tip. They fly in a very clumsy manner, and 

 may be found crawling over plants, &c, in great numbers for a day or 

 two, and then they disappear altogether. The flies may be easily caught 

 in a butterfly-net. If fowls are kept, I should spread the manure about 

 and let them pick and scratch it over, for they will soon pick out the grubs. 

 Mixing nitrate of scda with the manure might be tried, but I am not sure 

 whether it would have much effect upon the grubs, as I have not heard 

 of any experiments having been made on them. The grubs are undoubt- 

 edly injurious to the roots of plants at times." 



Coloured Photograph of an Orchid. — Mr. Odell exhibited a colour- 

 photograph of Cypripcdium insigne Sanderce, executed by a new method. 

 The yellow colour was very characteristic. It was received from Mr. 

 A. S. Hickley, Southampton. 



