Iff THE fiRlTtStt fSlAtfDS". 3 



navia, the species, according to Wallengren, was found as far north as 

 Dalarne and Helsingland, in Sweden " (' Entomologisk Tidskrift,' 

 1881, p. 121). 



I have mentioned above that var. scotica is not identical with var. 

 finmarchia, although both agree in being darker than the type. Our 

 Scotch var. scotica has the markings specially clear and distinct, whilst, 

 according to Schoyen's description and remarks above, var. finmarchia 

 has the markings less distinct and tending to obsolescence. 



Bryophila, Tr., perla, Fab. 



Vol. i., p. 8. Bryophila perla var. pyrencea, Oberthiir. This local 

 race was described by Oberthiir, and the specimens comprised under 

 this name appear to vary considerably inter se. The great character 

 of one form appears to be its suffusion with a reddish tint ; of the 

 other, the white ground colour of the wings. The former would 

 appear to be therefore an accentuated development of my var. flavescens, 

 the latter is a distinctly interesting type with its darker markings of 

 greenish-grey, such coloured markings not being, I believe, met with 

 in Britain, where the markings tend when intensified to bluish-black. 

 Mons. Oberthiir's original notice is as follows : " Common at Mont- 

 louis, but appears to be rarer at Cauterets. This variety offers two 

 types : The one, with the ground colour of the wings of a yellow 

 which is more or less rosy or reddish, the other, has the ground colour 

 of the wings whitish. The latter is very close to our (French) type of 

 the plains ; it is distinguished, however, by its larger size, and more 

 pronounced development of the markings and of the greenish-grey tint. 

 The hind wings are very much shaded with brown above. In the Alps, 

 the type of perla approaches very much the Pyrenean type with white 

 ground colour, but I believe that the type with yellow ground colour 

 and that with salmon-red ground colour, are restricted to the Pyrenees. 

 I have figured the type with the yellow ground colour from 

 Cauterets " (' Etudes d' entomologie,' viii., p. 48). The latter part of 

 the description appears to suggest that Mons. Oberthiir would 

 separate the yellow form from the salmon-red form. It is the former, 

 agreeing with my var. flavescens, that he figures (I.e. PI. i., fig. 13). 

 His idea that the yellow and red forms are peculiar to the Pyrenees, 

 receives no confirmation with regard to the former, as we get it in 

 England pretty freely, but with regard to the latter, I have not heard 

 of its occurrence elsewhere. 



Bryophila, Tr., impar, Warren (sub-species). 



Vol. i., p. 10. Bryophila impar. Since my note on impar was 

 written, I have had the pleasure and satisfaction of looking through 

 Mr. Farren's series of some 50 or 60 specimens, and also of seeing the 

 insect at large in Cambridge. There is a strong tendency in one's 

 mind at first to assume the complete distinctness of impar as a species, 

 because we are so accustomed to consider muralis as a coast species, 

 that its occurrence in an inland town is rather startling; but, I believe 

 it (muralis) used to be not uncommon on the walls of the Canal Bridge, 

 Old Kent Koad, S.E., now quite in London. After having thoroughly 

 considered the matter, I cannot help coming to the conclusion that 

 impar is specifically identical with muralis, and yet at the same time, 

 the species has undergone by its isolation and peculiarity of environ- 



