DIGNE REVISITED. 93 
being sure of calculating from the same points at the ends of the tibia, 
these being irregular for articulating purposes, and not always so in 
precisely the same details, or always seen in precisely the same aspect, 
and in many cases not separated from the corresponding articulating 
surfaces of the femur and tarsi respectively. Some obscurity is often 
added by the clothing of hairs and scales. The percentage of error is, 
however, small. Thus I should not suppose any J. crassiorella would 
have a length of less than °65 or more than ‘61, or that I’. casta goes 
below :77 or aboye ‘81, and any measurements outside these are pro- 
bably due to errors of observation. Ihave examined a very large 
number of these two species. I know of no reason to suspect greater 
variability in species where I have been able to examine only very few 
specimens. 
Digne Revisited. 
By H. ROWLAND BROWN, M.A., F.E.S. 
(Concluded from p. 59.) 
Thais, in fact, was over for me, and although I kept a wary eye on 
all occasions, only three belated females, the last on June 9th, fell to 
my bag. Of the little louse-like larva already to be found upon 
the Aristolochia, my companions collected a fair number, and, 
judging from the hundred or so I noticed feeding in the cupboard of 
the naturalist aforesaid on absolutely withered pabulum, I should 
think it was easy enough to rear. On the slopes of La Collette, beside 
the Theclids already mentioned, Limenittis camilla, Coenonympha arcania, 
Syrichthus sao, and Spilothyrus lavaterae also turned up, the latter in some 
profusion, though it was hard to get perfect specimens on the wine, and 
the frantic evolutions attempted in the pill-boxes only made matters 
worse. Cupido sebrus also occurred here, but its chief headquarters are 
in the torrent bed of the Eaux-Chauds, where it literally swarmed, 
with not a few Nomiades cyllarus, somewhat knocked about, and the 
males of Polyommatus eschert. Of the last-named we had a perfect feast 
of beauty one day at this spot. A stream comes trickling down 
from the higher slopes among a maze of hazel, privet, and clematis, 
breaking up over the saxifrage-fringed bank into the main river, and 
dividing among little islets of rich black mud. Upon them, when the 
sun was out, the number of Lycenids sucking in the moisture was 
legion. The male P. eschert in particular made a brave show, with 
herds of P. bellargus, C. sebrus, N. acts, P. icarus, and C. minima. The 
females, however, were more coy, and the few either taken or seen were 
distributed over the grassy trefoil-covered banks, where also Lycaena 
arion most abounded. About the privet blossoms—scanned by me in 
vain for Laesopis roboris—AMelitaea deione flitted in confusing company 
with M. phoebe, which it so nearly resembles, though it may be dis- 
tinguished here, at any rate, by the lighter coloration and inferior 
size of its wings. In the woods, carpeted with luscious strawberries, 
Pararge egeria ab. intermedia, P. megaera, Nemeobius lucina, and the 
ubiquitous M. athalia gleamed in and out of the shady walks, while 
the margin of uncultivated land, gemmed with the blue salvia, clover, 
hawkweed, and a fine red gladiolus, swarmed with Aporia crataeyi, 
Brenthis dia, and B. euphrosyne. An occasional Pyrameis cardui, 
worn to rags, would dash suddenly across the line of sight, and 
