SEASONAL POLYMORPHISM. . 149 
with a rather light underside,”’ which fly in Andalusia. Tutt remarks 
that this can only be the fine race, well described and figured by 
‘Oberthiir under the name of nevadensis (Et. Lép. Comp., iv., p. 250, 
and x., fig. 2372-3], which in consequence sinks in synonymy. This 
form stands exactly opposite to calida by its extremely reduced lunules 
and by its poor colouring on both surfaces. 
In Tuscany there exist precisely two extreme opposite races, which 
correspond to the two variations just mentioned (the series in my 
collection which better represent them are respectively from the Isle of 
Elba and from Florence) and intermediate gradations, according to 
localities. Tio the Elban race the name calida, Bell., is well suited, 
and so it is to the similar one I have collected in August at Tempio in 
Sardinia. The underside variations are at Elba very extensive in both 
sexes, but more marked in the female: besides the nymotypical 
individual form of calida, which I should describe as being of a very 
bright reddish fulvous, rather than of a “ brick-red,’’ as does Bellier, 
and besides the pallidefulva form (described below), the following are 
noteworthy: A form of a dark leaden gray, nearly entirely devoid of 
fulvous mixture, found in both sexes in June, at the beginning of the 
second generation and which I should call 1rrrapLumBea (types N. 61 
and 79, easily distinguishable from late individuals of the first 
generation by the absence of bluish scales at the base of wings) ; 
a form of a very dark chocolate-brown, evidently produced by the 
combination of the fulvous of calida with the gray of the preceding 
(form inFRacacaotica ; types N. 64 and 78 of my series); a few other 
specimens are identical with gallica and with aestiva, as regards under- 
side colouring, and many correspond to them by the extent of the orange 
lunules on both surfaces. 
Most of the individuals of the two summer generations from 
Florence differ markedly from the Elba race by their slightly larger 
size and by the much paler and duller colouring on both surfaces, 
which produces, in extreme examples, a strong resemblance to 
nevadensis, as figured by Oberthiir (fig. 2372-3*) ; from the latter they 
differ however by their smaller size, by never being equally pale and 
dull and by the breadth of the lunules above, considerably more. 
- extensive than in calida trom Elba, instead of much more reduced, as 
in nevadensis. The Florentine specimens, compared to the Elba ones, 
can be described as follows: the upperside is not of a blackish-brown, 
but of a brown inclining to fulvous; the lunules are not of a bright 
reddish-orange, but of a more yellowish and duller tinge on both 
surfaces ; they are markedly more extensive in both sexes ; the under- 
side is of a very pale café-au-lait inclining to fulvous in the majority 
of the males, and of an extremely pale fulvous (sometimes slightly 
pinkish) in the extreme examples of that sex and in the majority of 
the females. It must be noted that this pure and light fulvous colour 
is evidently due to the absence or the paleness of the gray, already 
described in the form infralbens, Vrty., of the first generation, who's 
“types ”’ belong precisely to the same race. I should adopt for the 
entire race the name of panuiperuLva, which I give to the summer 
* Judging by these figures, my impression is that this montana, Riihl 
(=nevadensis, Obth.), should be grouped with dricia ramburi, Vrty. (=idas, 
Ramb.), if the latter be a distinct species from medon; Chapman, however, has 
not found a marked difference between ramburi and medon even in the genitalia. 
