^ of the Genus Elachista. 307 



29. Elachista Consortella, Logan. 



The male of this is well distinguished by the fascia being limited 

 to a spot on the fold ; it is not very closely allied to any other 

 species. The female is very Wke Nigrella, but the fascia is placed 

 rather more obliquely. 



Male. — Expansion of the wings Sg lines. Head grey ; anterior 

 wings rather dark grey, with no further indication of the fascia 

 than a small whitish spot on the fold, which is followed by a 

 short black streak ; beyond the middle are two whitish opposite 

 spots, which almost form an angulated fascia, and from their 

 union some whitish scales run towards the apex of the wing. 



Female. — Expansion of the wings 3 lines. Head pale grey ; 

 anterior wings grey at the base, blackish before the fascia ; the 

 fascia is distinct, white and oblique ; the spots are triangular, 

 white and nearly opposite, that on the costa being slightly 

 posterior. 



Larva unknown. 



The perfect insect appears in March ; it occurs on Arthur's 

 Seat, near Edinburgh. 



SO. Elachista Suhnigrella, Douglas. 



The male, from its very indistinct, hardly perceptible markings, 

 can only be confounded with Obscurella, but it is smaller, and a 

 blunter-winged insect ; the female reminds one rather of Bedel- 

 lella and Nigrella; it is however much darker than Bedellella, 

 though not so dark as Nigrella, and the costal spot is very 

 evidently posterior to the dorsal spot ; from Nigrella it is further 

 distinguished in not having a whitish spot in the apical cilia. 



Male. — Expansion of the wings 3J lines. Head grey ; anterior 

 wings rather blunt, dingy grey, with a very indistinct, rather 

 oblique whitish fascia before the middle, and two indistinct 

 opposite spots beyond the middle, that on the inner margin 

 hardly perceptible ; cilia grey. 



Female. — Anterior wings blackish grey, with a distinct, slightly 

 curved, whitish fascia before the middle, and two triangular 

 whitish opposite spots beyond the middle, that on the costa 

 decidedly posterior and with its apex pointed outwards ; cilia 

 grey. 



The pale yellow larva mines the leaves of Bromus erectus, 

 making flat, narrow, yellowish-green mines, in April and July. 



The perfect insect appears at the end of May and in August ; 

 it occurs at Sanderstead, Mickleham and Guildford. 



