400 THE ZOOLOGIST. 
The Rev. Dr. Walker also exhibited a number of Lepidoptera, Diptera, 
and Hymenoptera, recently collected by himself in Iceland. The collection 
included the following, viz.:—Crymodes ewulis, Noctua conflua, Larentia 
casiata, Coremia munitata, Culex pipiens, Scatophaga stercoraria, Calliphora 
erythrocephala, Helophilus grenlandica, Bombus terrestris, &c. 
Mr. W. White exhibited, on behalf of Mr. G. C. Griffiths, a specimen 
of Nephronia hippia, Fab., var. g@a, Feld., which he believed to be 
hermaphrodite. He also exhibited, for comparison, a female of the same 
species. A discussion on hermaphroditism ensued, in which Mr. Distant, 
Capt. Elwes, Mr. M‘Lachlan, and Mr. Baker took part. 
Dr. Sharp exhibited specimens of Cychramus luteus and fungicola, Auct., 
and stated that they are the sexes of one species, C. luteus being the 
male, C. fungicola the female. In working through the Central American 
Cychramini, he had found that in some genera the males differed greatly 
from the females in size and sculpture; but this was not a constant 
character, for in some species, while certain males scarcely differed from 
the females in these respects, others were so different that they would 
scarcely be recognised as belonging to the same species. 
Mr. Edward A. Butler exhibited specimens of Platymetopius undatus, 
Deg., from Ewhurst, Surrey. He remarked that the species was recorded 
as having been once previously taken near Plymouth by the late Mr. John 
Scott. 
Mr. G. T. Baker read a paper entitled, ‘‘On the distribution of the 
Charlonia group of the genus Anthocharis.” Mr. Baker stated that the 
species, six in number, of this small division of the genus Anthocharis 
formed a very natural and closely allied group, presenting many points of 
interest, both in their relationship to each other and in their geographical 
distribution, which extended from the Canaries on the west to the valley 
of the Indus on the east. The author's theories as to the causes of the 
present distribution of the group, which were based on geological data, 
were discussed by Capt. Elwes, Mr. M‘Lachlan, Mr. Distant, and Mr. 
Stainton. 
The Chairman read a paper entitled “ On the genus Argynnis,” which 
gave rise to a discussion in which Mr. Distant, Mr. Jenner Weir, and 
Prof. Riley took part.—H. Goss, Hon. Secretary. 

