Aspades hutchinsonella middle, is a distinct black spot. A conspicuous greyish fuscous patch lies on the dorsal margin contiguous to the anal angle, its rounded inner edge narrowly margined by a line of black scales, its outer extremity touched with chestnut. This patch is connected at the anal angle with a shade of the same colour, which follows the apical margin to the apex, interrupted only by a small marginal spot of the pale stramineous ground colour, immediately below the apex, by which the darker shade appears to be deflected inwards. The hindwings are grey. Aspades hutchinsonella Aspades hutchinsonella is a species
The Missing Shade of Blue he later says, "this instance is so singular, that it is scarcely worth our observing" he cannot be referring to this particular example, but rather to the "type" of exception that it represents. It is also said that when Hume says, "Let all the different shades of that colour, except that single one, be placed before him, descending gradually from the deepest to the lightest; it is plain that he will perceive a blank, where that shade is wanting", he is assuming that colours are composed of a set of distinct independent hues, when in reality they form a continuum.