of the Genus Elachista. 315 



Expansion of the wings 4:\ lines. Head white ; anterior wings 

 white, tinged with pale fuscous along the costa and along the fold, 

 with a fuscous angulated fascia beyond the middle, of which only 

 the costal arm is distinct ; it terminates in an oblong black spot ; 

 beyond it is an indistinct paler (almost tawny) fascia ; on the middle 

 of the fold is a conspicuous elongate black spot ; cilia whitish, 

 with a black hinder-marginal line, rather distinct. 



Larva unknown. 



The perfect insect appears in April ; it was taken near Syracuse 

 by Professor Zeller. 



50. Elachista Rhynchosporella, Stainton. 



Easily distinguished from the preceding by the darker ground 

 colour, the smaller spot on the fold, the second spot being wanting, 

 and by the very indistinct line in the cilia; closely allied to Eleo- 

 chariella, but larger and paler. 



Expansion of the wings 41 lines. Head white, or whitish ; an- 

 terior wings dirty whitish, with dirty-grey or pale tawny streaks 

 along the costa and inner margin ; beyond the middle is an 

 angulated fascia of the same colour ; two irregular spots beyond 

 represent the second fascia ; cilia whitish-grey, intersected by 

 hardly perceptibly darker scales. 



The larva mines the stems of Scirpus ccespitosus (Eleocharis 

 ccespitosa), working downwards below the blossom in May. 



The perfect insect appears in June and July ; it occurs in the 

 New Forest, in the Cambridge Fens, and on moors in the north ; 

 on the Continent it has occurred in Silesia. 



51. Elachista Eleochariella, Stainton. 



Closely allied to the preceding, but smaller and greyer, the 

 grey, indeed, appearing as the ground colour. 



Expansion of the wings 3| lines. Head dark grey ; anterior 

 wings grey, with a whitish line along the fold, in which is a black 

 spot in the middle ; from the costa beyond the middle a whitish 

 streak runs towards the hind margin, and beneath it on the inner 

 margin is a small whitish spot; cilia grey. 



Larva unknown. 



The perfect insect appears in July ; it occurs in Scotland, near 

 Kilmun. 



52. Elachista Biatomella, Stainton. 



Readily distinguished from Eleochariella by the black spot 

 near the end of the costal white streak ; from Distmiella and 



