Agrochola macilenta, the yellow-line Quaker, is a moth of the family Noctuidae.

Forewing ochreous washed with pale fulvous; the inner and outer lines very faint, marked chiefly by the dark teeth on the veins; a dark spot at the base of the wing; median shade variable; stigmata of the ground colour, with slight pale outlines, the lower end of the reniform nearly always black; submarginal line ochreous edged inwardly with rufous, nearly straight except for the angulation on vein 7; hindwing grey, the fringe rufous; — in the ab.

nigrodentata Fuchs the basal, inner, and outer lines are all strongly marked, blackish and dentate.

The head is ochreous brown and the plate on the first ring blackish lined with white.

The larvae feed on various shrubs and deciduous trees, including Carpinus, Crataegus, Fagus, Populus, Prunus, Ulmus, Salix, Quercus, Calluna, Hieracium and Plantago.