164 THE ENTOMOLOGIST. 
interchange had taken place, in the others such an interpretation 
involved many difficulties which disappeared when the mimetic phe- 
nomena were interpreted as being due to the simple mimicry of one 
form by another. Dr. Dixey stated that he did not consider the 
Presidential chair to be a proper place in which to reply to Mr. 
Marshall’s criticism, and that he would therefore deal with the points 
at issue on some future occasion. Mr. C. J. Gahan very strongly 
supported the opinions advocated by Mr. Marshall, and expressed the 
view that while Dr. Dixey professed to support Millerian mimicry 
yet his defence of Reciprocal Mimicry really constituted a severe 
attack upon that theory. Mr.§8. A. Neave said that as a result of his 
field experience in Africa he was unable to accept the theory as to 
the function of ‘double aposemes,” but he did not mean thereby to 
imply that he rejected every case of Reciprocal Mimicry. He sug- 
gested that Alternate Mimicry might not be so uncommon a pheno- 
menon as Mr. Marshall appeared to think. Mr. Tutt, Mr. W. E. 
Sharp, and Professor Hudson Beare also made some brief comments 
on the subject—H. Rownanp-Browy, M.A., Hon. Sec. 
THe Sourn Lonpon EntromonoaicaL AND Naturau History 
Society.—March 11th, 1909.—My. A. Sich, F.E.S., President, in the 
chair.— Mr. West (of Greenwich) exhibited another section of the 
Society's reference collection which he had remounted and arranged. 
—Mr, South, a short series of Aczdalva degeneraria received from Mr. 
J. Walker, of Torquay, and pointed out that they were lighter in colour 
than the Portland’ form—Mr. Newman, specimens of Cleora angu- 
laria (viduaria), a pair of Phibalapteryx polygrammata ab. olivacea, 
and ab. obsoleta of Camptogramma fluviata, and four melanic examples 
of Notodonta ziczac_—Mr. Kaye, a drawer of aberrations and geo- 
graphical races of Cosmotriche potatoria. — Messrs. Tonge, Harrison, 
Main, Joy, Moore, Grosvenor, Pickett, Turner, Dr. Chapman, Dr. 
Hodgson, and Rey. G. Wheeler, a large number of species, races, and 
forms of the “blue” butterflies to illustrate Mr. Tutt’s remarks on the 
family. Mr. Tonge also exhibited photographic life-histories of the 
“blue” butterflies. Mr. Tutt then gave a ‘Gossip on the Blue 
Butterflies,” summarising all that was known of their life-histories 
and relationships, pointing out modern ideas of the grouping, and 
emphasizing the necessity of the genera being based upon the sum 
total of our knowledge of the species and their habits in all stages. 
March 25th.— The President in the chair.— Mr. A. E. Gibbs, 
E.E.S., of St. Albans, Mr. A. W. Buckstone, of Chiswick, and Mr. 
J. H. Rohde, of Reigate, were elected members. — Mr. G. B. Brown 
exhibited specimens of Hubolia bipunctarva from Branscombe and 
Dawlish, and pointed out their reddish suffusion compared with speci- 
mens exhibited from Horsley. He also showed specimens of Agriades 
corydon having slight reddish suffusion.—Mr. Hy. J. Turner, a box of 
butterflies recently obtained from Columbia. — Mr. Tonge, an under 
side of Acronycta pst, in which the central black spot was produced 
towards the base as a line——Mr. Bowman, a very pale female of 
Nyssia hispidaria from Chingford. — Mr. Coote, ova of the same 
species, and a female specimen of Anisopteryx ecularia. — Mr. Kaye, 
specimens of Chrysophanus dispar, and a short series of Xylina furct- 
