IQg (Dtcembcr, 1806 
Mr. A. F. SliepparJ exhibited certain British Lepidoptera received from Mr. 
Gregson, including Acidalia mancuniata, which Mr. Gregson proposed to re-name 
veteiuta, in consequence of the name mancuniata having been applied to, in his 
opinion, dwarfed females {! !) ; also Phycis suborTiatella, Zeller, a speciea of Gelechia, 
and varieties of Pieris rapae, P. napi, and L. sinapis. 
Mr. Stainton exhibited a living example of Stathmopoda Gv-erinii, bred from 
Aphis galls on PistacMa terehinthus. He remarked that these galls were described 
by Eeaumur, who said that the tree on which they were produced was sometimes 
called I'arbre mowc?ie (fly -tree) , in consequence of the galls, which extremely re- 
semble seed-pods, being found to be full of Aphides. Mr. Stainton said fm-ther, 
that probably the lai-vse of S. jysdella lived in galls on the alder, and that Linnaeu's 
words, " habitat in alnifoliis suhcidanea," might, on this account, still prove to be 
correct. 
Messrs. Sharp and Crotch exhibited 71 new British species of Coleoptera ; 11 
of these were new to science : these they described under the names of Ptilium 
concolor, Atomaria Wollastoni, Telephorus darwiniamis, T .scoticus, Sitones ononidis, 
Philonthus addendus, of Sharp ; and Anthicus salinus, Gyrophcena Po'veri, Lathro- 
Mum Jansoni, Stenus Shepherdi, and S. annulatits, of Crotch. 
Mr. Meek exhibited a Noctua apparently new to this country, and a new species 
of Tortrix bearing the name Dicrorampha, flavidorsana, Knaggs MS. 
Mr. Stevens exhibited new or rai'e species of exotic Coleoptera. 
Mr. Janson exhibited Macronychus 'i-tuberculatus, Miiller, new to this country, 
taken by Mr. T. J. Harris, of Burton-on-Trent. 
Prof. Westwood exhibited a curious example of Pieris Pyrrha, of which the 
sexes diflered remarkably; the specimen exhibited had all the left-hand side and 
the right-hand fore-wing coloured as in the male, whereas the right-hand hind- 
wing was coloured almost wholly as in the female ; also di-awings of various species 
of Leptalis, which mimicked species of Heliconidce ; and of Condylodera tricondy- 
loides from the Phillipines, an orthopterous insect, which exactly mimicked the 
Coleopterous genus Tricondyla (also from the Phillipines), supposing the latter to 
have abbreviated elytra. Prof. Westwood stated, that while admitting mimetic 
resemblances in all natural organisms, he considered they could only be looked 
upon as so many illustrations of the law of resemblance prevailing throughout 
nature, He considered that all had been created in the same garbs they now woi-e, 
and were not the result of natural selection, as supposed by Messrs. Bates and 
Wallace. 
Mr. Wallace argued on the other side, that these analogies proved to his mind 
the ti-uth of the theory of natural selection, and exhibited several insects in support 
of his statement, including a new species of Diadema (D. anomala), in which genus 
the males were usually suffused with purple, and the females obscure ; whereas, in 
this instance, the case was contrary. He considered that Prof. Westwood's argu- 
ments proved the truth of his opinion. Mr. Bates also spoke on the same subject, 
and exhibited interesting South American Butterflies, and explained their habits, 
in support of his and Mr. Wallace's theory. 
Dr. Sharp agreed with the truth of the theory of natui-al selection, but differed 
partially from Messrs- Bates and Wallace, as to the probable origin of mimetic 
analogies. 
