As in .` the case of the apple disease it forms large irregular blackish blotches on the fruit and leaves, the injury being often very severe especially in a cool, damp season.
Is to say, consists of dark blotches on a fawn ground, instead of a network of light lines on a dark ground.
The wings, which are not capable of being folded, are usually transparent, but occasionally pigmented and adorned with coloured spots, blotches or bands; the wing-membrane, though sometimes clothed with minute hairs, seldom bears scales; the wing-veins, which are of great importance in the classification of Diptera, are usually few in number and chiefly longitudinal, there being a marked paucity of cross-veins.
And is a freshwater fish, although examples are exceptionally taken in British estuaries and in the Baltic; some specimens are handsomely marbled with dark brown, with black blotches on the back and dorsal fins.
When an attempt is made to represent in colour the actual distribution of the races (as in Dr Chavanne's Geographischer and statistischer Handatlas) the effect is that of occasional blotches of solid colour on a piece of shot silk.