69 



AUGUST I2th, 1920. 



It was announced that Mr. W. West, an ofiginal member of the 

 Society, had died on July 30th. Mr. West had been Hon. Curator 

 from the establishment of that office in 1872. 



Mr. B. S. Williams exhibited a specimen of Pipameift atalanta 

 having the lowest (third) subapical spot absent, and agreeing with 

 an example described in Mr. Woodford's account of the butterflies 

 in Oxford University Museum [Knt., Aug., 1920). It was the only 

 variety bred out of 400-500 larvae in 1912. 



Mr. E. Step exhibited living specimens of Dnrcus parallelnpi- 

 pediis which he had found on the side-walk of a road in Wimbledon 

 Park. 



He also reported the Mountain 'Po\y]}ody {Poly podium i)Iier)op- 

 teris) as plentiful in a locality to the west of Lyndhurst, New 

 Forest. " Although one station for it is given in Townsend's Flora 

 of Hawpshire, it is not in this part of the county ; so that I was 

 pleased a year ago to receive a letter from Miss M. G. Tennant, 

 enclosing a specimen of the Fern, and asking if I knew of this 

 locality she had discovered eight years previously. At ni}'- sugges- 

 tion she reported the find to the Rev. E. F. Linton, F.L.S., who is 

 recording the Flora of the district. Last week Miss Tennant again 

 wrote to say that she finds her phegopteris station much more 

 extensive than she had realised last year, the plant forming dense 

 clumps in the moist alder-thickets for half a mile along a certain 

 stream ; one tuft seen was over four feet across. From the parti- 

 culars my correspondent has furnished,! should imagine the species 

 is not newly established, and one wonders how it has escaped the 

 observation of the numerous botanists who have made the Forest 

 their hunting ground. For reasons that will be obvious, I refrain 

 from giving precise details of the locality, though for my personal 

 guidance the lady has kindly mapped the spot." 



Mr. Alfred Sich exhibited pupal cases of Aphelosetia {Elachista) 

 cenisella, Hb., and the larval mines in a leaf of Phragmites com- 

 munis, which had contained four larvae, and three pup» spun up on 

 other leaves. The four larvae all produced imagines. The mine 

 was gathered at Byfleet on the occasion of the Society's excursion 

 this year. 



He also showed the three British species included in the genus 

 Ochsenheimeria, viz., O. mediopectinella {hirdella), 0. bisontella, and 

 0. vacculella. 



