of the Genus Elachista. 313 



Expansion of the wings 4^ lines. Head dark greyish-brown ; 

 anterior wings dark brownish-black, towards the apex paler, being 

 irrorated with yellowish scales ; nearly in the middle is a straight 

 deep yellow fascia, which gradually expands towards the inner 

 margin ; cilia entirely dark greyish-fuscous. 



The larva, which is dark grey, with pale tawny head, makes 

 large whitish -brown slightly-puckered mines in the leaves of 

 Brachy podium syloaticum, in October and November. 



The perfect insect appears in May ; it occurs near London and 

 at Stockton-on-Tees ; also at Frankfort-on-the-Maine, Ratisbon, 

 Arolsen, and Zurich. 



45. Elachisia Chrysodesmella, Fischer. 



By the dark cilia this can only be confused with the pre- 

 ceding, from which it is distinguished by its smaller size, broader 

 and brighter fascia. 



Expansion of the wmgs Sg lines. Head'dark grey ; anterior 

 wings blackish, with a rather broad, shining, pale yellow fascia 

 in the middle, broadest on the inner margin ; cilia entirely dark 



Larva unobserved ; it feeds on the leaves of Carex montana. 

 The perfect insect appears in May ; it occurs at Pisa and 

 Ziirich. 



46. Elachista Serricornis, Logan. 



This has certainly some resemblance with Eleochariella and 

 Biatomella, but is distinguished by the more uniform grey ground 

 colour of the anterior wings from both those species. The ab- 

 sence of the second spot distinguishes it from Biatonella, and the 

 very distinct dark line in the cilia furnished a good character for 

 separating it from Eleochariella. 



Expansion of the wings S\ lines. Head grey ; antennae, to- 

 wards the apex, much serrated ; anterior wings grey, with a black 

 spot on the fold beyond the middle, and a short oblique whitish 

 streak from the costa before the apex, pointing towards the hind 

 margin ; this streak is internally margined with dark grey ; cilia 

 grey, intersected by a black hinder-marginal line. 



Larva unknown. 



The perfect insect appears in June; it has occurred in Sussex 

 and near Edinburgh. 



