75 



Messrs. Harrison, Main, and Cowham exhibited long series 

 of Colias cditsa, bred from a ? var. helice, received from Dr. 

 Chapman from the South of France in 1904. The results 

 tabulated are as follows : 

 Bred males 79 = 53% = 53% 6* . 



,, females, edusa form . 19 = 13% \ _ 0/ 



helice form . . 52 = 34% J ~ 47/o *' 



Total number of specimens bred = 150 



Of the 71 females 19 (= 27 per cent.) were typical, 52 (= 73 

 per cent.) were var. helice. 



Only one or two of the specimens were intermediate in 

 shade, and Mr. Carpenter remarked that he had had but few 

 intermediates when breeding from South France ova. 



Mr. Edwards exhibited examples of the following species 

 of the genus Papilio : P. peranthus from Java, closely allied to 

 the P. pericles of Wallace from Timor ; P. gelon from New 

 Caledonia, a most variable species, scarcely two being alike ; 

 P. encelades from Celebes, of which the female is still un- 

 known, although the male was described in 1836 ; and P. 

 acauda from the United States, belonging to the P. polyxenes 

 group. 



Mr. West (of Greenwich) exhibited a small collection of 

 curious Homoptera and Heteroptera from S. Africa. 



Mr. Goulton exhibited a photograph of the nesting spot 

 of the nightjar, showing two young birds recently hatched. 

 The protective resemblance to the surroundings were so 

 perfect that it was quite impossible to feel absolutely sure of 

 the exact position of the young birds. 



Mr. Kaye exhibited specimens of the preserved larvas of 

 Triph&na interjecta, and pointed out the distinguishing char- 

 acters of the species, with special reference to the larvae of 

 T. orbona, also exhibited. He stated that the larva of T. 

 interjecta may be distinguished from T. orbona by (1) its being 

 more generally slender, (2) in not having any curved pale sub- 

 dorsal marks, and (3) by lacking the dark brown or black 

 triangular marks on the eleventh and twelfth segments. The 

 ground colour is as a whole considerably paler, though indi- 

 viduals are quite dark. 



Mr. J. W. Tutt then gave an address on " Our British 

 Plumes," illustrating his remarks by a diagrammatic, philo- 

 genetic tree on the blackboard (see p. 1). 



