( iii ) 



stage would be recognised as potato-scab, and in a more 

 advanced stage as potato-rot. Mr. Collin gave a short 

 resume of Mr. Hopkins' experiments and observations, and 

 remarked that though at present there was no record of the 

 species doing any damage to the British potato crop, still its 

 occurrence in England was of considerable economic importance. 



Larv-e op Sitaris MURALis. — Commander J. J. Walker 

 showed on behalf of Mr. A. H. Hamm, very young larvae of 

 Sitaris muralis, hatched at end of October and beginning of 

 November from ova laid by 9 $ s in captivity (the natural 

 place of deposit of these eggs being at the entrance to the 

 burrow of the bee, Anthojjhora pilij)e8, in stone walls near 

 Oxford). Hitherto the larvae had kept together on the mass 

 of empty egg-shells. 



Pyralis lienigialis at Oxford. — Commandei- Walker 

 also exhibited two specimens of the rare Pyralis lienigialis, 

 Zell, 9 , taken at light in his house at Summertown, August 

 1906 and 1907. 



South American Thynnid^. — Mr. Rowland E. Turner 

 brought for exhibition a box of Thynnidaz fi'om S. America, 

 mostly from Chile, several of the species having been cap- 

 tured in copula. The mouth parts in the females of the 

 S. American species are not reduced in size and almost rudi- 

 mentary, as with almost all the Australian species of the 

 family. As is the case in Australia the species become less 

 numerous in the Tropics, and in the northern half of S. 

 America seem to be confined to the highlands. Several new 

 species were shown from Mendoza and the Peruvian Andes. 



The Mandibles of Trachyphl(eu8 scabriculus. — Prof. T. 

 Hudson Beare exhibited a specimen of TrachyiM(x,vs scabri- 

 culus with the two deciduous mandibles still in place. The 

 specimen was taken at St. Margaret's Bay in August 1907 ; 

 it was found at the roots of grass on the cliffs. 



Suggested Mimicry in Bourbon Butterflies. — Lieut.- 

 Colonel Manders exhibited the 9 of Pajjilio phorhanta from 

 Bourbon, an aberrant member of the idreus group of Papilios, 

 and compared it with the other members of the same group 

 from the African mainland, Madagascar and Mauritius, kindly 

 lent for the purpose by Professor Poulton. He pointed out 



