tN THE BRITISH ISLANDS. 105 



A. Ground colour whitish-grey. 



a. var. pallida, mihi. The basal area pale grey, the outer area 

 almost white, the line of demarcation crossing from the costa to the 

 inner margin between the reniform and orbicular, the extreme margin 

 a little darker with a pale line parallel to hind margin, stigmata quite 

 white ; hind wings almost white, greyish on outer margin. 



/3. var. insulicola, Stdgr. Dr. Staudinger describes in his ' Catalog,' 

 p. 103, a variety under this name, as : "Al. ant. griseis, albido nigroque 

 strigulosis." This is the only described variety mottled with trans- 

 verse lines that I have been able to trace. 



y. var. albicans, mihi. This variety has the anterior wings uni- 

 colorous white, with a little grey shading in the centre of the wing 

 around the orbicular ; the stigmata are distinguishable owing to this 

 grey colour, the extreme outer area a little shaded with grey. This is 

 an exceedingly rare variety. 



B. Ground colour fuscous-grey. 



The type bicoloria, Villers has the basal half greyish fuscous, 

 the outer half whitish or pale whitish grey. 



a. var. reticulata, mihi. The anterior wings pale grey with the 

 whole area covered with transverse fuscous lines, the stigmata gener- 

 ally distinct, no trace of the division of the wing into two halves, the 

 basal and outer areas, the stigmata (especially the reniform) generally 

 very distinct. 



{$. var. humeralis, Haw. This is Haworth's humeralis, var. y., his 

 humeralis a and /? being more or less referable to the typ'e, his a 

 is equally divided into a fuscous or blackish basal part and pale outer 

 part, his /3 has the blackish basal part broken up with whitish, whilst 

 his y has the blackish colour absent, the whole area being ashy or 

 fuscous grey. Ha worth writes : " Nigredine anticarum pene evanes- 

 cente, caateris ut in ultima (var. /:?)" (' Lepidoptera Britannica,' p. 215). 



C. Ground colour ochreous- or reddish-brown. 



a. var. furuncula, Hb. This is one of the most striking of all the 

 varieties of this species. Hiibner's fig. 54:5 represents the type of this 

 variety and has " the anterior wings of a dark reddish-brown colour 

 extending from the base to an almost straight transverse line between 

 the orbicular and reniform ; the outer area of the wing stands out con- 

 spicuously pale, ashy-grey in colour, the part near the boundary of the 

 darker basal area being more ochreous in colour. The hind wings are 

 pale grey with darker outer margin." 



/3. var. brunnea-reticulata, mihi. Like var. reticulata, but the 

 ground colour reddish or ochreous-brown, instead of fuscous. 



y. var. terminalis, Haw. This is an unicolorous reddish-brown 

 variety, with the slightest possible traces of a darker clouding on the 

 outer margin and around the stigmata. Haworth's diagnosis is : " JV. 

 alis fusco-rufescentibus margine postico tmdatim nigricante." He also 

 adds : " Variat." Haworth then divides his terminalis into two groups 

 a and p. Of the former he writes : " Alse anticas medio vix nebu- 

 losse, sed uniformiter rufescentes, posticae perfuscse, ciliis cinereis ; " 

 and of the latter " alis anticis fusco rufescentibus absque albedine, in 

 medio solum paulo saturatioribus, vel potius nigro pulverulentibus ; 



