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 JZ". crassiordla would 

 have a length of less than -65 or more than -61, or that F. casta goes 

 below -77 or above -81, and any measurements outside these are pro- 

 bably due to errors of observation. I have 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 BEOWN, M.A., F.E.S. 

 (Concluded from p. 59.) 

 Tliais, 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 AristolocJiia, 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, Limenitis Camilla, Coenonymi'i'lta arcania, 

 SyrichtJms sao, and SjnlotJnjrus lavaterae also turned up, the latter in some 

 profusion, though it was hard to get perfect specimens on the wing, and 

 the frantic evolutions attempted in the pill-boxes only made matters 

 worse. Uiipido 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 Pohjommatus escheri. Of the last-named we had a perfect feast- 

 of beauty one day at this spot. A stream comes trickling doAvn 

 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 Lyctenids sucking in the moisture was 

 legion. The male P. escheri in particular made a brave show, with 

 herds of P. bellargus, C. sebrus, N. acis, 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, Avhere also Lycaena 

 arioii most abounded. About the privet blossoms — scanned by me in 

 vain for Laesopis roboris — Melitaea deione flitted in confusing company 

 Avith M. phocbe, 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, 

 Pararye eyeria ab. intermedia, P. meyaera, Xoneobius lucina, and the 

 ubiquitous 21. 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 cardiii, 

 worn to rags, would dash suddenly across the line of sight, and 



