478 MR. A. G. BUTLER ON [Nov. 4. 



Mr. Power near Blakeney, on the 11th of September last. He 

 informs me that he shot it from a thick clump of thistles along the 

 Cley sea-wall. No other bird was near it, although he had observed 

 a great arrival of Wheatears, Redstarts, and one Bluethroat that 

 afternoon, all coming direct from the north, the wiud being east- 

 north-east. As will be seen, this bird was much damaged by the 

 shot, indeed so much so that the sex was indistinguishable. This 

 is the third occurrence of this species in Great Britain on record. 



Mr. W. B. Tegetmeier, F.Z.S., exhibited a specimen of the File- 

 fish (Balistes capnscus) recently caught off Folkestone. 



A paper was read by Mr. F. E. Beddard on the anatomy and 

 systematic position of a gigantic Earthworm from the Cape Colony, 

 proposed to be called Microchceta rappi. 



This paper will be published entire in the Society's 'Transactions.' 



The following papers were read : — 



1. On a Collection of Lepidoptera made by Major J. W. 

 Yerbury at or near Aden. By Arthur G. Butler, 

 F.L.S., F.Z.S., &c. 



[Eeceived September 30, 1884.] 



(Plate XLVI.) 



The collection of which this is an account is one of the greatest 

 interest, since it not only contains fine series of the beautiful species 

 of Teracolus recently described by Col. Swiuhoe, but also many 

 remarkable iutergrades between certain long-established species, 

 tending to prove either that hybrids between allied species are fertile 

 (which I believe is rarely the case), or that in Aden a condition of 

 things still exists which in Asia proper and in Africa has long passed 

 away. Thus in the Eupla'ince we find Limnas chrysippus gradually 

 passing into L. alcippvs and freely intermarrying with the Indo- 

 African and Lower-Nubian types of L. dorippus ; yet, as the range 

 of these forms does not by any means correspond, they are practically 

 distinct (see chnrt, PI. XLVI.). Even in Africa, where L. chrysippus 

 has a wide range, it does not appear to coexist with L. ahippus : it is 

 true that the range of the latter species can be but imperfectly traced ; 

 thus, in the Museum series we only have it from Sierra Leone to 

 Ashanti, and in Mr. Godman's collection l it occurs here and there 

 at wide intervals over great part of Africa, but does not extend 

 further south than the Orange Biver (Mr. Godman's localities are 

 Sierra Leone, Cape Coast Castle, Winnebah, Senegal, Lower Niger, 

 Sennaar, Abyssinia, and Kimberley). The existence of a Hypolimnas, 



1 I here desire to express my thanks to Mi'. Godrnan for examining the whole 

 of his specimens and forwarding to me a list of their localities. 



