52 THE ENTOMOLOGIST. 
Mr. Hellins found that in captivity the larve eating the ivy were 
more advanced than those feeding on the holly, although from the 
eggs of the same female (Ent. Mo. Mag. xiii. 29); this fact is 
very remarkable, for it would seem that those which must be 
single-brooded, if holly-feeders only, come more slowly to maturity 
than those which might be double-brooded, the ivy-feeders. 
To sum up: my hypothesis is that L. argiolus is digoneutic 
when feeding on the ivy, even if entirely confined to that plant; 
that it is monogoneutic when feeding on the holly alone, and that 
even if it had become digoneutic, the failure of a supply of food 
for the larve produced by the imagines of the summer emergence 
would not necessarily destroy the species, inasmuch as some of 
the pupe would remain over till the next spring before their 
emergence took place, and a gradual elimination of the digoneutic 
condition would be brought about. 
I may remark, in conclusion, that it appears the larve have 
been found by Mr. Harwood, of Colchester, on the flowers of 
Rhamnus frangula ; this shrub would bloom about the same time 
as the holly, Ilex aquifolium: and by Mr. G. F. Matthew, R.N., 
on the flowers of the Hscallonia in June (‘Larve of British 
Butterflies and Moths,’ Ray Soc., 1886, pp. 96 and 100); the 
latter shrub, with me, blooms later than the holly, so that these 
larve might have first fed on the tender shoots, not on the 
flowers, which must always be the case with the summer brood 
of those feeding on the ivy, Hedera helia, as the latter plant 
blooms late in the autumn. 
Chirbury, Beckenham ; February, 1886. 
DESCRIPTION OF CRAMBUS CANTIELLUS, mint, A 
CRAMBUS NEW TO SCIENCE. 
By, J. Tuts. 
In response to my request (Entom. 29) for specimens of 
Crambus contaminellus, Mr. W. H. B. Fletcher, of Worthing, has 
been kind enough to send me a very fine bred series of Crambus 
contaminellus from the south coast; and side by side with my 
series of the Crambus captured at Deal, as described in this 
magazine as above referred to, there can be no shadow of doubt 
about their distinctness. 
