132 
to be discovered, there was only a choice of difficulties from which he saw no escape : 
on the one hand, if comparatively small differences were for generic purposes dis- 
regarded, the genera became unmanageable in extent and incapable of precise descrip- 
tion; on the other hand, if such differences were taken into account, there was no 
limit to the creation of genera; almost every species would eventually be raised to 
generic rank, or rather the genus would sink to the level of the species, and in fact be 
lost as a distinct step in the ladder of classification. 
Papers read, 
Mr. Geo. Semper, of Altona, communicated a paper entitled ‘“ Description of 
Papilio Godeffroyi, n. sp.” 
Mr. R. McLachlan read a paper entitled “ Observations on some remarkable 
Varieties of Sterrha Sacraria, Linn. with general notes on Variation in Lepidoptera.” 
January 1, 1866. 
F. P. Pascor, Esq., President, in the Chair. 
Additions to the Library. 
The following donations were announced, and thanks voted to the donors:— 
‘Proceedings of the Royal Society, Vol. xiv. No. 78; presented by the Society. 
‘Journal of the Proceedings of the Linnean Society, Vol. viii. Zoology, Nos. 31 & 325 
by the Society. ‘Bulletin de la Société Tmpériale des Naturalistes de Moscou,’ 
1865, No. 2; by the Society. ‘Verzeichniss der um St. Petersburg aufgefundenen 
Crabroninen,’ von August Morawitz; by the Author. ‘ Ueber eine neue, oder vielmebr 
verkannte Form von Mannchen unter den Mautillen, nebst einer Uebersicht der in 
Europa beobachteten Arten, von August Morawitz; by the Author. ‘ Enumeratio 
Animalium Musei Imperialis Academie Scientiarum Petropolitane, Lepidoptera, 
Parts i.—iii., by E. Ménétriés; presented by A. Morawitz, Esq. ‘ Coleoptera Atlanti- 
dum, being an enumeration of the Coleopterous Insects of the Madeiras, Salvages 
and Canaries, by T. Vernon Wollaston, M.A., F.L.S.; by the Author. ‘Sepp, 
Nederlandsche Insecten,’ 2nd Ser. Vol. i. Nos. 47—50; Vol. ii. Nos. 1—S8; by S.C. 
Snellen van Vollenhoven, Esq. ‘The Zoologist’ for January; by the Editor. ‘The 
Entomologist’s Monthly Magazine’ for January; by the Editors. 
The addition, by purchase, of the following was also announced :—‘ Skandinaviens 
Coleoptera,’ af C.G. Thomson, Tom. vii. Haftet ii; Duval, Fairmaire et Migneaux, 
‘Genera des Coleopteres d'Europe,’ Livr. 130. 
\ 
Election of Members. 
Henry Adams, Esq., F.L.S., Captain Julian C. Hobson, C. O. Rogers, Esq., and 
Dr. E. Perceval Wright, were severally ballotted for and elected Members. Thomas 
Blackburn, Esq., and W. B. Pryer, Esq., were severally ballotted for and elected 
Annual Subscribers. 
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