aoe”) 
they might, perhaps, have told a very different story about 
the habits of the Prisopi. 
Mr. C. O. WatrerHousE observed that he had written the 
paper to which Mr, Gahan referred for the purpose of 
throwing doubt on the story of the aquatic habits of the 
genus Prisopus, in which he had no belief. 
LEUCANIA PALLENS AND L, FAvIcoLoR.—Mr. Soutn exhibited 
a drawer of Leucanid moths captured and reared by the 
Rev. W. P. Waller in the Woodbridge district of Suffolk. In 
the first series were three specimens, selected from thirty, 
that were reared in June 1908 from ova deposited by a female 
captured at sugar in a marsh near Woodbridge in June 1907. 
The female parent, also shown, was apparently referable to 
L. pallens, but of her offspring twenty-three specimens were 
of the typical favicolor form, and the other seven were 
examples of the yellow form of favicolor—ab. lutea, Tutt. The 
next series of twenty-four specimens showed the progeny 
of a female favicolor taken in the same marsh, July 1910. 
The majority of these specimens were not separable from 
pallens, nine were typical favicolor, and the others intergrades, 
but favoured pallens more than favicolor. In a letter sent 
with the insects, Mr. Waller, referring to the moths reared 
in 1911, wrote: ‘Is it possible this female paired with a male 
pallens ?—or have we here a species still in the making, not 
yet fixed, if I may so express it?”’ Mr. South observed that 
seeing that Mr. Waller had reared favicolor from eggs laid 
by a pallens-like female, and obtained pallens from the ova of 
a female favicolor, the obvious inference was that there was 
cross-pairing in each case. It was, however, curious to note 
that although all the moths resulting from the pallens ova 
were of the favicolor form, less than half of the moths from 
Javicolor ova were of the female parent form. 
Turning to the interesting series of L. pallens taken at 
sugar at Waldingfield in the Woodbridge district, it would 
be seen that some of the specimens comprised therein bore 
a close resemblance to some forms of /avicolor. Possibly 
these particular specimens were hybrids, or perhaps more 
correctly heterozygotes, and it would seem probable that the 
pallens-like female of Series 1 was also a_ heterozygote. 
From the evidence afforded by the material submitted, one 
