137 



18 years, of strict inbreeding, together with the results of 

 subjecting the larvae to colour environment. Those larvas 

 that were fed up under orange coloured muslin have a great 

 tendency to produce imagines of a deeper orange. Those fed 

 under green muslin produced imagines all much lighter and 

 the orange shade entirely absent. Those fed under red 

 muslin produced imagines all deep reddish-orange in the 

 males and deep chocolate banded in the females. The ab. 

 picketteria, a half-banded form, of which a long series was 

 shown, is now a constant strain, the deep orange ground 

 colour in the females gives them a striking appearance. 



DECEMBER 9th, 1915. 

 Mr. R. Adkin, F.E.S., in the chair. 



The decease of a member Professor Meldola was aonounced. 



Mr, F. W. Frohawk exhibited a remarkable female aberration of 

 Papilio itiachaon in which the ground colour was of a dark cinna- 

 mon-brown, it was bred from \Yicken Fen in 1895 ; a male form of 

 the same species with odd coloured anal angle blotches on the hind- 

 wings, the right side being deep ochreous-yellow, the left side dark 

 Indian-red ; and another male with both anal blotches of a pale 

 ochre-yellow, both the latter were also from Wicken Fen. He also 

 showed three Colias hyale and one C. edum blotched with crimson, 

 and a coloured diagram showing the magnified scales of different 

 colours, varying from yellow to crimson, some single scales of the 

 latter colour were isolated and scattered round the edge of the 

 blotch. Mr. Frohawk was of opinion that the abnormal colour was 

 not, as had been previously conjectured, the result of a stain. 

 Reference was made by members to the red of a similar brilliancy 

 and tint, occurring naturally on the costa of Goneptenjx rhamni and 

 in some South American Pierids of the genus Catapsilia. 



Mr. Hugh Main exhibited a cage which he had had made to 

 enable him to watch the excavation of its burrows by Geotriipes sp., 

 and explained his method of observation with some of the results so 

 far obtained by him. 



Mr. B. S. Williams exhibited an example of Kphyra pcndidaria 

 var. suhroseata which he had bred from a wild larva beaten in the 

 autumn of 1914, in Surrey. 



Mr. Dunster exhibited dwarf specimens of — 



