IN THE BRITISH ISLANDS. 95 



grey, with scarcely any trace of the ordinary transverse lines. There 

 is the faintest possible trace of the subterminal line, which, however, 

 is scarcely noticeable in the uniform pale colour, reniforin whitish 

 (scarcely distinct from ground colour), orbicular and reniform not 

 traceable. (2). Grisea-flavo. Like grisea-albo, but with the reniform 

 indistinctly ochreous. This is a rare variety. I have a specimen from 

 Deal, and another from Shoeburyness. This may be var. moderata, 

 Ev., which Staudinger describes as, " multo pallidior, cinerascens." 



/?. var. reticulata, mihi. (1). Eeticulata-albo . The anterior wings 

 grey, in some specimens with a faint ochreous tinge ; an abbreviated, 

 followed by a complete, basal streak, orbicular outlined in darker, a 

 pale transverse angulated line beyond the reniform, and a pale sub- 

 terminal line nearer outer margin ; the space outside the subterminal 

 line rather darker than the ground colour ; orbicular and claviform of 

 the ground colour ; reniform, more or less distinctly white (sometimes 

 only the outer edge white, the remainder of the ground colour) ; no 

 i-* -like mark under stigmata. (2). Beticulata-flavo. Like reticulata- 

 albo, but with the reniform yellowish. This is probably the com- 

 monest form occurring in Britain. 



y. var. secalina, Haw. The secalina of Haworth (' Lepidoptera 

 Britannica,' pp. 210, 211) refers to unanimis, Hb., as also do his vars. a 

 and ft of secalina, but his secalina var. y. appears to be a variety of 

 didyma. His description is : " Alis pallidioribus minus rufescentibus ; 

 stigmatibus majoribus albidioribus ; lineola nigra medio validiore ; 

 posticis dilutioribus " (' Lepidoptera Britannica,' p. 211). This appears 

 to me most decidedly to refer to secalina-albo, a not very common form 

 of didyma, with grey ground colour, transverse lines as in var. reticu- 

 lata, and with a blackish >-H -like mark, but not developed into banded 

 form ; reniform white. (2). Secalina-flavo. Like secalina-albo, but 

 with reniform ochreous. The variety secalina is much rarer than 

 reticulata. 



8. var. I-niger, Haw. The type of this variety is I-niger-flavo. 

 Haworth's description (' Lepidoptera Britannica,' p. 211) is as follows : 

 " Alis griseo fuscoque variis, litera I nigra in medio ramulum exerente." 

 " Alse griseae, in medio fascia fracta nigro fusco cinereoque varia, in 

 qua stigmata ordinaria, et lineola nigra ramulum antrorsum exerens, et 

 literam I Eomanorum simulans. Lineolae duse alia3 basi etiam nigrae. 

 Margo posticus maculis duabus semirotundatis subconfluentibus. 

 Stigma reniforme ochraceum. Posticae alae fuscae." His var. y., how- 

 ever, is I-niger-albo, being like var. I-niger, but with a whitish reniform. 

 Haworth writes : " Alis ravusatis stigmate reniformi niveo dorso stri- 

 gaque ejus ravis." This grey-banded form is not uncommon. I have 

 specimens from many localities. 



e. var. virgata, rnihi. (1). Virgata-albo. This is a slight modifica- 

 tion of the above, the central area being darker than the basal and outer 

 areas, but without the -< -like mark characteristic of I-niger ; the ground 

 colour is very pale in some specimens ; the reniform white. (2). Ft'r- 

 gata-flavo. Like virgata-albo, but reniform ochreous. 



. var. oculea, Gn. Guenee's type of oculea is a much paler grey 

 than either of the preceding varieties, many specimens being quite 

 whitish ochreous, or whitish grey, the costa has a broad patch, almost 

 black, extending along almost its whole area, the reniform whitish. 



