NOTE ON A SPECIES OF LYCHENID. 171 
retrace my footsteps half-way along before the red flag of the 
butts, and the bullets of the Classe engaged across the stream in 
firing exercise. Only two Lycenids were about; P. icarus—or 
maybe a third brood of thersites, for we knew it not then as 
a separate species, and I took none to identify—shared the 
lucerne with Colias edusa, and the stony pathway adjacent 
yielded not a few ‘A. corydon.” I appear to have taken only two 
males on this occasion, evidently attracted by their perfect 
condition. These are unquestionably Dr. Verity’s aragonensis 
reverdini in the form it assumes in the Alpes-Maritimes and 
Basses Alpes at the lower elevations where the mean temperature 
is rather of the Midi than of the Central Alps. 
Looking over previous captures I do not appear to have 
observed aragonensts at Digne earlier than June 18th, 1899; and 
this on the same pathway where the October emergence was 
flying somewhat further away from the town. But I possess 
examples from Brantes, Vaucluse, in May, received from my friend 
Mr. Henry Brown of Paris. On referring to my diary, not 
having then seen the real thing from Albarracin, I find that 
I regarded these Vaucluse specimens as of a transitional form 
to var. albicans, Bdv. 
As might be expected then, we have the form now separated 
as rezniceki, Bartel (=meridionalis, Tutt) beginning to emerge 
in April and May on the lower spurs of Mt. Ventoux, and in the 
first half of June at the somewhat higher altitude of Digne. The 
occurrence of a worn female aragonensis at Digne on August 14th, 
1908, simultaneously with perfectly fresh corydon shows that, as 
in the Tuscan hills, corydon affects the neighbourhood of Digne 
also; and the August examples of corydon, superticially at all 
events, are inseparable from those of the higher Basses Alpes. 
My series hence being extremely limited I am not prepared to 
dogmatise on the subject; yet the extraordinary freshness of the 
October aragonensis lends colour to the assumption that there may 
actually bea third emergence of aragonensis in the Basses Alpes, 
just as I have recorded (antea, p. 189), in exceptional seasons 
much further north a third, of Nomiades semiargus. Indeed, 
the continuity of Lampides beticus from year’s end to year’s end 
in sheltered corners of the Riviera suggests that others of the 
Lycenids, unlike N. melanops, tend to preserve an unbroken series 
of emergences, and are only deterred by unfavourable weather, 
and the consequent necessity for hibernation, not invariably 
imposed by the disappearence of pabulum. 
I need not reproduce here the several superficial and organic 
characters by which Dr. Verity differentiates the two species 4. 
corydon and A. aragonensis, and apportions to each the varieties 
and geographical forms hitherto grouped under one major species. 
Readers of the ‘ Entomologist’ interested will find the whole of 
them set out clearly in the work to which I have referred, and 
