LITHOSID^. 199 



2. N. mundana, L. — Expanse, | inch. Semi-transparent, 

 brownish white ; fore wings with faint brown transverse lines. 



Antennae short and threadhke, fringed in the male with 

 delicate bristles ; pale brown, rather thickened toward the 

 base in both sexes, the basal joint having a large tuft of 

 scales ; head tufted with yellowish scales ; thorax very weak, 

 pale brown ; abdomen similar. Fore wings ovate ; costal and 

 hind margins and apex much rounded ; dorsal margin nearly 

 straight; semi-transparent, very thinly scaled, smooth and 

 shininsr : of the faintest shade of brown ; the usual first and 

 second lines light brown, curved and much indented, but not 

 very distinct ; between them is a brown dot in the discal cell ; 

 edge of the costa, and the cilia, Hght brown. Hind wings 

 rounded, nearly transparent, shining and almost iridescent, 

 faintly tinged with brown, especially in the cilia. Female 

 with the body stouter, often with the wings rather smaller, 

 very nearly transparent, and w^ith the brown colour and mark- 

 ings much more faint or hardly perceptible. Underside of 

 the wings iridescent, faintly brownish, nervures slightly 

 browner ; body and legs pale brown. 



Hardly variable, except that specimens occur, in both sexes, 

 but more especially in the female, having the wings colourless 

 and quite transparent, except at the extreme margins. This 

 form was described by Haworth as a distinct species under 

 the name of Hemerobia. 



July and August. 



Larva less than half an inch long ; stout and bristly, of 

 uniform thickness, with the usual spots raised, and emitting 

 slender hairs. Head small, dark brown or blackish ; body 

 above bright yellow, with a greyish-brown dorsal stripe, a 

 blackish dorsal spot on the eighth segment, pairs of sulphur 

 coloured spots on six other segments, and a blackish-brown 

 subdorsal line ; tubercles and hairs dark greyish-brown ; legs 

 paler ; undersurface pale greyish-brown. 



