Mythimna favicolor, or Mathew's wainscot, is a moth of the family Noctuidae.

Forewing pale olive brown; veins concolorous, slightly defined by brown; the intervals at termen with brown streaks; a small black dot at lower end of cell; an outer row of black dots on veins, sometimes reduced to two only, on veins 2 and 5; hindwing fuscous whitish; - ab.

rufa Tutt the head, thorax, and forewings are bright rufous; abdomen and hindwing tinged with rufous; — argillacea Tutt has the forewing greyish luteous, the fringe pink; hindwing senea.

cenea Mathew is deep orange, the hindwing smoky; the veins darker and the fringe pale; — obscura Mathew is cinnamon-brown with smoky clouding between the veins in places; hindwing smoky; fringe pale;- pallida Mathew has the forewing very silky, pale creamy buff, the termen flushed with rosy; hind wing whitish grey; — lastly, fusco-rosea Mathew is rosy buff: the hindwing pale rosy: the veins conspicuously dark brown; close to the ab.

Larva pinkish ochreous reticulated with darker; dorsal line pale, narrow, with darker edges: subdorsal greyish white; a broader grey stripe above the spiracles and a pinkish ochreous one below.