ON ZYGHNA RHADAMANTHUS, ESPER. . 161 
It is not as small as on the arid and barren slopes along the Futa road 
in Tuscany, but its mountain characteristics consist in the very thin 
scaling, which makes it much more translucent and shows off a diffused 
black marginal band also on the ferewing, and in the dull colouring, 
which is very different from the gaudy metallic one of the other races ; 
the dark scaling is of a blackish indigo and the red one is pinkish; 
the extent of the latter is on the whole greater than in Florence and 
about the same as in Sicily. Rocci has found this race also on the 
highest Ligurian mountains. 
The following tables, drawn out from measurements of the wing 
expanse made by Querci, shows the individual variations of each 
race :— 
Expanse. Florence. Traversa.  Villatina. S. Martino. Bolognola. 
o 2 ef 2 of 2% g z o 2 
mm. 22 to 23 i 1 
»,. 23 to 24 2 AB 1 1 
, 24 to 25 2 na al 14 6 7 
», 25 to 26 Bir aA ae (Ge 13 1S 2 
5, 26 to 27 22 10: 1) 1S} 2 20 2 
», 21 to 28 Sy We ig) TLL 8) ae IY 
» 28 to 29 i Bees) ean Qe aL 
ne 29) to 30 eee 
The races and many striking individual forms of the very variable 
subspecies rhadamanthus have been admirably described and partly 
fioured by Charles Oberthiir in his Ht. Lép. Comp., vol. iv. (1910), 
where he summarises also what had been published before by himself 
and others. I can do no better than refer the reader to this work. I 
am sure M. Oberthur will pardon me if I take this occasion to mention 
my personal impression that he should have fixed by a name some of 
the races he has so well described, and if I take the liberty of suggesting 
the following for those of rhadamanthus :— 
Race pyreneza, mihi, for the race of La Traucada d’Ambouille in 
the Pyrenees (page 590), which corresponds to sibyllina of owytropis. 
Race barcina, mihi, for the race of Barcelona (Spain), (pagé 590), 
small, very bright, with body covered with white hair, in which speci- 
mens quite similar to oxytropis (I have seen a Spanish one too) occur 
together with form kiesenwetteri. 
Race oxytropiferens, mihi, for the race of the Maritime Alpes 
Départment (page 592), particularly beautiful and variable, ranging 
from individuals indistinguishable from oaytropis to the darkest 
kiesenwettert and producing the lovely form with a white streak along 
the cubital nervure of forewing, which should be called albovittata, 
mihi. 
Finally I think the name grisea, Obth., given to a form with indigo 
scaling replaced by very pale gray, which is the prevailing one at 
Digne, should be extended to the entire race (page 591). 
Synoptic table of characters in the different races of oxytropis :— 
Locality .. Sibillini Mts. Florence. Futa Pass. Mainarde Palermo. 
Mts. 
Name ..sibyllina, Viy. nymotypical. pumila, Vrty. laterubra, Vty. quercti, Vriy. 
Usualexpanse 25-28mm. 26-27mm. 23-25mm. 25-27mm. 27-29 mm. 
Density ofsca- Very thin. Thick. Moderately Moderately Thin. 
ling e thick. thick. 
