34 



Mr. Harrison and Mr. Main exhibited hybrids of Biston hirtaria 

 and Nyssia zonaria, reared by Mr, Harrison of Middlesboroagh ; 

 male and female from N. zonaria rnalex/i. hirtaria female, with 

 typical specimens of both species for comparison. 



Mr. Newman exhibited hybrids of the same species, and stated 

 that to his knowledge no females had yet been reared from the 

 crossing B. hirtaria male and A'^. zonaria female. 



Mr. E. Adkin exhibited series of hybrids between Biston hirtaria 

 male x Ntjftsia zonaria female and N. zonaria male x B. hirtaria 

 female, together with series of the two species for comparison. 



He said that it would be remembered that some time last year 

 (" Proc. S. Lond. Ent. S.," 1910, p. 141) he exhibited specimens of 

 the last named hybrid and called attention to the remarkable form 

 taken by the single female that he then had. Through the kind- 

 ness of Mr. Harrison, of Middlesborough, who had paid considerable 

 attention to the cross-pairing of these and other species, he had this 

 spring been enabled to rear the series now exhibited. The males 

 reared from each of the two crosses were very much alike ; in size 

 about midway between the two parents, and in markings and colour 

 combining their characters in a remarkable way. But the point to 

 which he wished to call particular attention was the apparent 

 attempt on the part of the females reared from the zonaria male x 

 hirtaria female cross to produce fully developed wings, which 

 had resulted in the production of a very curiously formed insect, 

 having wings equal in length to those of the male parent, but of 

 only about half the width and acutel}^ pointed at the apex ; of a 

 pale grey colour strongly irrorated with blackish, practically devoid 

 of markings other than a darkening of the wing-rays, and fringed 

 with an abundance of coarse, bristly hairs — their general aspect 

 being that of a greatly enlarged edition of the rudimentary wings of 

 the zonaria female. Of the hirtaria male x zonaria female cross, 

 no females had been reared among the specimens that had come 

 under his notice, amounting to a score or so in all. 



Mr. Gough exhibited specimens of the form arete of Aphantopus 

 hyperantu% taken in both Kent and Surrey. He also showed 

 several forms intermediate between arete and the type. 



A resolution was passed strongly condemning the action of the 

 Government in presumably misappropriating a portion of the land 

 previously earmarked for the projected completion of the Natural 

 History Museum. 



Mr. R. Paulson, F.R.M.S., read an interesting paper on 

 " Lichens," illustrated with numerous mounted specimens and a 

 considerable number of lantern slides. 



