NATURAL HISTORY SOCIETY OF GLASGOW. 99 



had been considerably increased, and was still capable of larger 

 extension. 



The following gentlemen were elected office-bearers for the 

 session : — Professor John Young, M.D., F.G.S.,F.E.S.E., President; 

 James Eamsay, Thomas Chapman, and James Barclay Murdoch, 

 Vice-Presidents ; Kobert Mason, Secretary ; R J. Bennett, 

 Treasurer ; Peter Cameron, Librarian ; Hugh M'Bean, John 

 Kirsop, James Coutts, James Lumsden, F.Z.S,, Duncan M'Lellan, 

 Henry C. Young, David Corse Glen, C.E., F.G.S., John Young, 

 F.G.S., and Francis G. Binnie, Members of Council. 



Messrs John Eobertson, James Paton, Joseph Somerville, 

 and James T. M'Callum, were elected ordinary members of the 

 Society. 



SPECIMENS EXHIBITED. 



Mr Thomas Chapman exhibited specimens of Papilio antlmacJms 

 from Western Africa, the largest butterfly, and one of the rarest 

 species, known ; also, from Cape Coast Castle, specimens of the 

 large beetle GoUathus clrurii, on which he made a few remarks. 



PAPERS READ. 



I. — On a iMCuliarity in the habits of a species of Cinopsilus. 



By Mr Peter Cameron. 



Mr Cameron said — The Chalcididae exhibit in their manner 

 of pupation two forms. In the one case the i)upa has each limb 

 enveloped in a separate thin, transparent white pellicle, which 

 does not enfold the organ in a very compact fashion, and when 

 these skins are cast off they do not retain the shape of the creature 

 whose body they covered. In the other type the skin of the pupa 

 is hard and thick, and remains of the same shape after the insect 

 has left it, as it did before. It, moreover, closely envelopes the 

 limbs of the pupa, so as to give it the appearance of the obtected 

 pupa of the lepidoptera, and in no other hymenopterous family 

 do we find pupae of this nature. It seems to be the case also 

 that these two forms are correlated with differences in the habits 

 of the insects, for those of the first class are parasites on gall flies, 

 or on wood boring insects, and they pass the pupa state enclosed 

 in the galls, etc., in which they lived ; while the other tribe are 

 attached to free feeding larvae, and they pass the period of 

 quiescence in a position more or less exposed. The Euloj^hides 



