167 
YORKSHIRE NATURALISTS’ UNION. 
ENTOMOLOGICAL SECTION. 
A well attended meeting of this section was held in Leeds, on Saturday, 
March 21st, under the Presidency of Dr. Croft. The members assembled 
in the Philosophical Hall, where they had the pleasure of seeing the tine 
collection of Moths made by Mr. Lloyd while in South Africa. The 
insects had been taken at electric light, and many fine and extraordinary 
species were represented. 
By the kind invitation of Professor Garstang, the members then pro- 
ceeded to the University, where the ‘Clarke’ collection of Exotic and 
European Lepidoptera was shown. The specimens were in fine condition 
and of exquisite beauty. Mr. Mark Sykes also showed cases of models 
and their mimics in many species of foreign butterflies. 
In the evening, Professor Garstang gave an instructive address on 
‘ Mimicry in Exotic Butterflies.’ He stated that many species liable 
to the attacks of birds mimicked in colouration the inedible species 
occurring in the same neighbourhood with them. Cases containing speci- 
mens were handed round showing many striking examples where the 
model and the mimic were almost identical, although the species were 
generically widely separated. The Professor detailed the polymorphic 
colouration of the females of a widely distributed African Papilin. The 
male and female in Madagascar are both of one type in colour and mark- 
ing, while on the African continent seven forms of the female are known 
all distinct from each other in colour, and closely mimicking various 
species of inedible Danaids that occur in different areas of that continent, 
while the males keep to the Madagascan colour type in all cases. Other 
instances were given where in various regions the inedible species seem to 
have set fashions in colours and markings, which the edible species follow 
assiduously. A discussion followed by Messrs. Taylor, Porritt, Sykes, and 
Lloyd. Mr. B. Morley then read notes relating to swarms of spring 
caterpillars which have occurred in one wood four years in succession. 
These are given on another page. A vote of thanks was cordially given 
to Dr. Croft, who had kindly entertained the members to tea ; and to 
Professor Garstang for his kind invitation and the great interest he had 
taken to make everything so enjoyable. 
: o : 
Per Rail. The Great Central Railway Company has issued a magni- 
ficent volume with the above title, which deals fairly exhaustively with 
the area served by the Company. There are numerous illustrations, 
diagrams and maps, one of the last named showing a plan and section of 
the concealed coalfields of the North of England, being of exceptional 
interest. 
Guide to the Geology of the Whitby District, by Lionel Walmsley. 
(Horne and Son, Whitby, 371pp., is. net). Mr. Walmsley states that six 
years ago he first became acquainted with the science of geology. He 
now writes a guide to the Geology of the Whitby District, which is presum- 
ably reprinted from a local paper. During the past six years at any rate, 
he seems to have become fairly familiar with the principal memoirs 
dealing with the district, and in these has deeply delved, and has made 
tracings of the plans, sections, fossils, etc. The guide is presumably 
meant for the casual visitor, though for that purpose it is a little technical 
here and there. A geologist will find it useful. For a small pamphlet of 
37 pages, printed from newspaper type and containing advertisements, 
the price of is. seems rather stiff, and we trust if the author’s hope for a 
second edition is realised, he will dispense with the advertisements and 
sell the pamphlet at sixpence. 
3914 May 1 . 
