The Zoologist— May, 1869. 1687 



llie group appeared to be more unstable, for although the true Macbaon was there 

 found, it was associated with two other forms exhibilinp: greater divergency from the 

 typical form. This was another instance, analogous to what he had before recorded 

 respecting the Theonoe group of the genus Seplalis, in which a certain type of form 

 was found to be constant at ihe opposite ends of its area of distribution, but was liable 

 lo variation in intermediate localities ; thus tending to show that the development or 

 manufacture of new species takes place, not necessarily over the whole range of dis- 

 tribution of the particular type, but only in limited areas of the total range, where and 

 when the particular circumstances are most favourable to variation. 



A letter from Mr. H. L. Schrader was read by the Secretary ; the writer described 

 some of his observations on species of CEceticus, from which he inferred that those 

 species are viviparous. 



Papers read. 



The following papers were read : — " Descriptions of two New Species of Papilio from 

 Ecuador, and of six New Species of Diurnal Lepidoptera from Nicaragua;'* by 

 Mr. Hewitson. 



" Contributions to an Insect Fauna of the Amazons (Coleoptera, Prionides)." By 

 the President. 



" A Monograph of the Panorpidae found in Europe and the adjoining Countries ; 

 with a Description of a New Species from Japan." By Mr. M'Lachlan. 



April 5, 1869. — H. W. Bates, 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,' No. 109 ; presented by the Society. 'Journal of 

 the Agricultural Society of England,' 2nd Ser., vol. v., Part 1 ; by the Society. 

 'Mittheilungen der Schweizerischen entomologischen Gesellschaft,' vols. 1 and 2; 

 by the Society. ' Studien an Acariden,' Von Edouard Claparede; by Sir John 

 Lubbock, Bart. ' Die Otiorhynchiden s. str. nach den morphologischen Verwand- 

 schaflsverhaltnissen ihus Hautscelets vergleichend dargestellt von Georg Seidlitz ;' 

 by the Author. ' Report on the Culture of the Japanese Silkworm, Bomhyx Yama- 

 mai, in 1867-8, in England,' by Dr. Wallace ; by the Author. ' The Insect Hunter's 

 Year-Book for 1868,' and ' The Zoologist' for April; by the Editor, E. Newman, Esq. 

 ' The Entomologists' Monthly Magazine' for April; by the Editors. 



The following addition by purchase was also announced : — Gemminger and Von 

 Harold, ' Catalogus Coleopterorum hucusque descriptoruni,' Tom. iii. 



Exhihilions, SfC. 

 Mr. Pascoe exhibited a new genus of Diaperinse from Espiritu Santo, in which the 

 horns on the head between or above the eyes, which distinguish many of the males of 

 Platydema, Diaperis, Hoplocephala, &c., were transferred to the apex of the prothorax ; 

 the female showed a slight approach to the same formation. Also species of the 

 European genero Apion, Attelabus, and Elleschus, recently discovered in Australia; 

 and several remarkable unpublished forms of Curculionidae, among which were — a new 

 genus from Macassar allied lo Oxycorynus, having the pronotum distinct from the 



