( vii ) 



A discussion followed in which Mr. Bacot, Dr. T. A, 

 "Chapman, Mr. G. Meade- Waldo and the President took part, 

 Mr. A. Harbison pointing out that in similar experiments 

 conducted by himself with Mr. H. Main with British Pieria 

 napi X P. var. bryoniae from Switzerland carried through three 

 generations, they had quite failed to obtain Mendelian pro- 

 portions, but in the case of Aplecta nebidosa the Mendelian 

 proportions were absolute. (Cp. Proc. Ent. Soc. 1907, p. liv.) 



Pupal coloration of Pieris. — Mr. H. M. Edelstbn showed 

 a living pupa of Pieris rapae attached to a blade of Clivia, the 

 deep green pigment assimilating closely to the coloration of 

 the leaf. 



Hybrid Zygaena. — Mr. R, Adkin exhibited a hybrid? 

 between Zygaena fiUpendulae and Z. achilleae, taken by Mr, 

 A. W. Benton in the neighbourhood of Oban, N.B. 



Mr, J. W. Tutt expressed his opinion that the form was an 

 aberration of Z. fiUpendulae, and that in nature the two species 

 were unknown to pair. 



Papers. 



Mr. Hamilton H. Drucb, F.L.S., F.Z.S., communicated a 

 paper " On some new and little known Hesperiidae from 

 Tropical West Africa." 



Mr. G. A. K. Marshall, F.Z.S., read a paper entitled 

 *' Birds as a Factor in the prodviction of Mimetic Resemblances 

 in Butterflies." He explained that one of the chief criticisms 

 directed against the theories of mimicry was to the effect that, 

 on the whole, birds did not destroy butterflies to any appreci- 

 able extent ; he had therefore collected together all the available 

 evidence bearing on the question. As indicating the extent of 

 such observations, it was stated that these records refer to a 

 considerable number of species of both birds and butterflies, 

 as might be judged from these approximate figures : Palaearctic 

 Region : 33 birds, 34 butterflies ; Ethiopian : 26 birds, 26 

 butterflies ; Oriental : 27 birds, 46 butterflies ; ISTearctic : 

 46 birds, 20 butterflies. Unfortunately in the Neotropical 

 Region, from which the greatest amount of evidence might 

 have been expected, such exact observations had been almost 



