47 
grey above ; towards the distal part of the costa a large whitish spot, 
which is posteriorly somewhat ferruginous, and is followed by a very 
fine, white, waved stripe (or streak); at the apex of the wing a linear, 
black mark. The type is, therefore, apparently the grey form, inter¬ 
mediate between Haworth’s immanata and marmorata ; his marmorata 
var. p, in which the white area was black-speckled, as well as black- 
lined, must have run it close, and perhaps such a figure as Barrett’s, 
pi. 357, fig. 1 a, might be referred to it rather than to the true black- 
banded form; but I do not think any of the named forms are referable 
here. 
Ab. immanata, Haw. (Wood, fig. 573; Newm., Brit. Maths, p. 186, 
var. 1) —perfnscaria, De la H., nee. perfuscata, Haw. — perfuscata, 
Guen. (Spec. Gen., x., p. 467, pi. xvii.,fig. 2), nec. Haw., may stand for 
the forms in which the central area is black, not grey, for this was 
Haworth’s typical form*; his “ vars.” had the band more tinged with 
ferruginous, or more cinereous centrally, and he admits that his 
marmorata runs his immanata remarkably close. Amaenata, Stph., is 
simply small ab. immanata from Devon, said to be distinguishable by 
its narrower wings. Wood’s figure (574) shows the form with white 
central area, mentioned by Stephens as a var. of his amaenata, and 
really referable to the aberration next to be mentioned. 
Ab. punctum-notata (Marsh.), Haw., was a mere catalogue name 
until 1809, when it was determined by Haworth for the white-banded 
citrata, which he called marmorata, Fab. (Wood, fig. 575). As I have 
shown above that marmorata is invalid by reason of homonymy, 
punctum-notata steps in as “ nov. nom.” Guenee, rejecting the 
name marmorata, uses immanata for the white-banded form, which is 
•clearly wrong. Omicronata, Don., may have been founded on a con¬ 
fusion of both truncata and citrata, as its author says it is found in 
“ June, July, and August,” but his figure restricts it to citrata, and 
shows a mere chance sub-aberration, with the black lines rather strong- 
on the whitish central area, and forming “a double 0 nearer the 
anterior margin,” i.e., of the central area. It is simplest to quote it as 
synonymous with ab. punctum-notata. Similar remarks apply to 
utnaenata var., Steph., Wood, fig. 574, and passeraria, Frr., pi. 486-3 ; 
the latter is a neat little bred specimen from the “ Schliickenalpe ” 
(a name I cannot find in my gazetteer) wdth the white, central area 
broadly grey-margined. I cannot quite match either of these figures 
in my own long series, and it is clear that if one tried to name every 
accidental form that occurred in such a species, one would require 
almost as many names as specimens. 
The form acutata, Guen., seems inclined — to judge from what its 
author says—to form a local race in Besancon, near Saut-du-Doubs, 
where Bruand used to take it. The forewings are more pointed and 
elongate than in normal citrata, and the prongs formed by the 
“ elbowed line ” are also exaggerated ; the hindwmgs of the $ are un¬ 
usually pale, and without markings. Possibly it does not really differ 
from Stephens’ amaenata. Nothing is said of the colour of the central 
* The new ab. of “ C. truncata,'’ diagnosed by Klemensiewicz ( Verh. z-b. Ges. 
Wien, xliv., p. 188) but not named, is clearly one of the slight sub-aberrations of 
this ; I have an Esthonian example agreeing well with his diagnosis. 
xviii. 
