396 PYRALIDINA [PLATYTES 



separate, 8 and 9 sometimes coincident. Hindwings : 4 and 5 

 stalked or coincident, 7 out of 6. 



A small genus, not yet recognised outside Europe. 



Fore wings with white central streak . 1. alpinella. 



without paler central streak . 2. cerussella. 



1. P. alpinella, Hb. 17-20 mm. Forewings with apex 

 strongly triangularly produced ; brown, mixed with dark 

 fuscous and whitish ; a white longitudinal central streak, 

 posteriorly suffused ; median and second lines sharply angulated 

 outwards above middle and above dorsum, median dark ochreous- 

 brown, blackish on lower edge of central streak, second white, 

 edged with dark brown, in disc posteriorly with blackish ; cilia 

 silvery-metallic towards middle. Hindwings grey. 



Hants, Norfolk, I. of Man, on sandy coasts, very local ; C. 

 Europe ; 7, 8. 



2. P. cerussella, Schiff. 12-14 mm. Forewings with termen 

 slightly sinuate; in <J grey-brown or ochreous- brown, in $ 

 whitish much sprinkled with fuscous towards costa and 

 termen ; median and second lines angulated outwards above 

 and below middle, median ferruginous-brown, second somewhat 

 pale, edged with ferruginous-brown ; three black terminal dots 

 below middle ; cilia metallic. Hindwings grey or fuscous. 



England to Lancashire, in dry grassy places, local ; Europe, 

 WC. Asia to N. Persia; 6, 7. Larva pale pinkish -ochreous, 

 light fuscous, or brown-greenish ; dots darker ; head yellowish 

 or yellow -brown, sometimes brown -marked : amongst roots of 

 grass (Festuca 1) ; 4, 5. 



4. EUCHROMIUS, Gn. 



Face with conical horny projection. Antennae in <$ ciliated. 

 Forewings : 7 separate ; in with a semitransparent patch in 

 cell towards base. Hindwings : 4 and 5 stalked, 7 out of 6. 



A genus of about a dozen species, characteristic of the 

 Mediterranean coasts, but one species has spread widely, 

 probably by artificial means. 



1. E. ocelleus, Hw. 19-22 mm. Forewings light brownish- 

 ochreous, somewhat blackish-sprinkled, posteriorly whitish and 

 thickly black -sprinkled ; two parallel sinuate ochreous -yellow 

 silver-grey-margined postmedian transverse streaks, enclosing a 

 whitish streak ; two angulated grey subterminal lines, becoming 

 ochreous -yellow towards costa ; a terminal series of golden- 

 metallic spots, partially preceded by black marks. Hindwings 

 whitish, more or less suffused with grey. 



