﻿41 



disposition of marking I find perfectly constant in those I 

 have captured. 



" In the Continental specimen I find the orange spot extends 

 considerably beyond the discoidal spot, and is continued to 

 the inner edge of the wing, causing the hinder angle of the 

 wing to be orange. Lang, in his "Rhopalocera Europoe," figures 

 this species with the hinder angle orange, as though the 

 drawing had been taken from a Continental specimen ; but 

 the orange of the wing extends only in relation to the discoidal 

 spot, to the extent usually seen in British specimens. Newman, 

 in his British Butterflies, figures the species with the shading 

 in lieu of colour extending to the inner edge of the wing, as 

 usual in Continental but not British specimens. 



" The distinction pointed out is very small, but if it be 

 constant our Euchloe cardamines is an insular variety easily 

 separable from continental specimens of the species." 



Mr. Frohawk presented a water-colour drawing by himself 

 of the ^^^ of the Great Auk {Alca impennis, L.). 



Mr. B. W. Adkin exhibited a mounted specimen of the 

 Robin {Erithacus rubecula, L.), having the feathers of the head 

 of a white colour. The specimen was found dead in a garden 

 at Lewisham, 1878. Mr. Adkin said that two years afterwards 

 he observed a specimen at Reigate with the same peculiarity, 

 and he asked whether any Member could give him information 

 as to whether it was due to variation or caused by age. Mr, 

 Frohawk remarked that from an examination of the feet of the 

 bird exhibited, he was of opinion that it was not an old one, 

 but undoubtedly a variety. Mr. J. Jenner Weir also expressed 

 an opinion that the white plumage of the head was due to 

 variation. 



Mr. J. W. Tutt read a paper, **' The Morphology and 

 Physiology of an Insect." 



APRIL i2th, 18S8. 

 T. R. BiLLUPS, Esq., F.E.S., President, in the Chair. 



Mr. F. G. Fenn, on behalf of Mr. T. D. A. Cockerell, 

 exhibited a new rose-gall, Rhodites hdievculator, Riley MS. n. 

 sp., and the following note by Mr. Cockerell was read : — 



" Every British Entomologist must be familiar with the red 



