lO PEOCBBDINQS OF THlil 



The report of the Donations received since tlie hist General 

 Meetinjj^ was laid before the Fellows, and the thiinks of the Society 

 to the several Dunors were ordered. 



The President referred to two works presented by Mrs. Horsley, 

 namely, a handsomely bound copy of Dr. Eraithwaite's ' British 

 Moss Flora,' 3 volumes, and a splendid copy of Schimper's 

 ' Bryologia europa3a,' 6 volumes, both from the late Dr. Kobert 

 Braitluvaite's library, in accordance with his expressed wish. 



A special vote of thanks was passed for this valuable gift. 



Miss Eleanor Vachell was admitted a Fellow. 



Mr. Edwin Heni*y Kirby and Mr. Frederick William Mills were 

 elected Fellows. 



Lord EoTHSCHiLU, F.R.S., F.L.S., exhibited a large series of 

 " Mimetic Species of tlie African Nymphaline genus Paeudacixm 

 and the Lycsenid genus Mhnacrcea, together with their Acrseine 

 and Danaine models and some co-mimics," and read the following 

 summary : — 



The exhibition is intended to illustrate not only the strong 

 mimetic tendency in tlie geuera Psem/acrcea and Mimacrcea, but 

 also to show that the various cases of mimicry appear to centre 

 rouiul a few given models and is evident in a number of genera 

 not at all related or closely connected. This goes to prove that 

 the variation in a given direction is due to local external condi- 

 tions and has become iixed by selection and the influence of the 

 Mendelian law. The curious case of Acrcea encedon, a non-edible 

 species, also mimicking the Danaine model Danais chrysipinis. 

 goes far to |)rove this, for the resemblance of two protected insects 

 of different sub-families can only be considered as i-esemblance or 

 rather similarity produced by one and the same external influence. 

 The exhibit was primarily got together as a supplement to 

 Professor Poulton's wonderful case of the Psendacrcea poggei and 

 its new form carpenten. I also exhibit the non-mimetic males of 

 the Papilio co-mimics as well as the non-mimetic species of 

 Psefodacrcea. Special attention is drawn to the unique specimen of 

 the red form of Pseitdacrced imitator, the chrgsippus-Yike Pentila, 

 and the dorippus forms of Telipna and Pseudalitis. 



Prof. E. B. PouLTON, F.E.S., F.Z.S., showed specimens of a 

 new mimetic form of Pseiidacrcea poggei (Dewitz) from ex-German 

 East Africa, with other African mimics of Danaida chrysippus 

 (Linn.). 



He also gave an account, illustrated by a large selection of 

 lantern-slides, of " The Mimetic and Mendelian Relationships of 

 the ' White Admirals ' of 'North America," of which the following 

 is an abstract : — 



Tlie " White Admiral " butterflies of the Nymphaline genus 

 Limenitis or Basilarchia (the North American sub-genus) form an 



