( cx ) 
Mr. H. RowLanp-Brown said that in Cantal the resemblance 
between E. melampus and EF. epiphron was so close that they 
were difficult to separate. 
Mr. H. J. Turner remarked on the close resemblance at 
Mirren between the Erebias manto, stygne, oeme and medusa, 
and at Cortina between HL. pronoe and E. ewryale, var. ocellaris. 
The Rev. G. WHEELER also spoke of the close resemblance 
at Miirren between EL. manto and E. oeme, the nearly black 
forms caecilia of the former and lugens of the latter being 
predominant. He observed that this was the more remarkable 
in that these were generally high mountain forms, whilst 
at Miirren, and even above in the Blumenthal, Lycaena arion 
showed no tendency towards obscura nor Chrysophanus 
hippothoé towards eurybia. He could only state the facts, 
not account for them. 
The PRESIDENT observed that in the Sefinenthal, near 
Mirren, but not in the direction of the Blumenthal, L. arion 
does tend to the obscura form. 
Prof. PouLTon suggested that perhaps in such associations 
as those of the Erebias exhibited, those specimens which did 
not conform to the general pattern might be more conspicuous, 
and consequently more apt to be weeded out. 
PIERIDS AND THEIR SCENT-SCALES.—Dr. F. A. Dixry 
exhibited a drawer containing specimens of the genus Prervs, 
with drawings of their scent-scales, and remarked on them 
as follows :— 
Dr. A. G. Butler, writing in the Annals and Magazine of 
Natural History, 7th series, vol. ii, 1898, p. 17, divides the 
genus Preris, Boisd., into four groups or sections, the first 
three of which are represented by P. demophile, Clerck, 
P. viardi, Boisd., and P. phileta, Fabr., respectively. With 
these three sections I do not propose to deal, further than to 
say that they are no doubt closely allied to each other, and 
to certain other American species such as P. pyrrha, Fabr., 
P. malenka, Hew., P. lorena, Hew., and P. lypera, Koll., which 
have sometimes, I think erroneously, been included in the 
genus Mylothris. The fourth of Dr. Butler’s groups, which 
may be called the P. buniae section, stands well apart from 
the others. All the males, as Butler observes, exhibit well- 
