138 THE ENTOMOLOGIST. 
speaks of the varieties of Polyommatus Phleas, P. Xanthe, and 
P. Gordius; then he comes to P. Hippothoé and P. dispar. 
As is well known to entomologists, in certain double-brooded 
species, the first brood is sometimes so different, in colour and 
even in size, from the second, that they seem to be different 
species. Such is the case with Araschnia Prorsa, in the French 
vernacular called ‘‘ Carte géographique brune,” and A. Levana, 
“Carte géographique fauve.”” A. Levana, the spring form, is the 
smaller of the two, and the butterfly emerges from the 
hybernating pupa in May; Prorsa makes its appearance about 
the end of July. During the winter another variety of this 
genus may be obtained by artificial heat, which again differs 
from A. Prorsa and A. Levana; it is then called A. Porina, 
‘Carte géographique rouge.’”’ A. Porima is sometimes found 
in a state of nature. With respect to Polyommatus Hippothoe and 
P. dispar, which are, it would seem, one and the same species, 
I translate freely from the French a part of Mons. Brown’s 
interesting article. He says :—‘‘ As we are now speaking of the 
genus Polyommatus, I would ask in my turn for some information 
respecting P. Hippothoe, This beautiful insect is common in 
the marshes which extend to the north and north-west of 
Bordeaux, and also in other directions. It has two generations ; 
the first in May and June, the second in August and September. 
The specimens of the second brood offer nothing remarkable, 
and correspond undoubtedly to the type described and figured by 
Godart in the first volume of his work; it is not so with respect 
to the specimens of the first brood. The latter answer in size 
and brilliancy of colours almost exactly to the two figures, and 
the description given by Duponchel, in his supplement on dispar, 
described later on by all authors, and by Duponchel himself, as 
being allied to P. Hippotho?. M. Gaschet, a lepidopterist of 
Bordeaux, who possesses specimens of the English dispar, finds, 
it is true, some difference from ours: ‘There is something 
different,’ he tells me, ‘ but very little. For my own part, I, who 
am entirely disinterested in the matter, find the difference so 
insignificant as to be almost imperceptible.’ I should be 
interested to hear whether, in the north, as in our country, 
P. Hippothoé is double-brooded, and, if so, why is not the first 
‘dispar’? I also ask myself, if the celebrated English dispar 
butterflies were not merely specimens of the first brood, collected 
—_—" 
