of the Genus Elachista. 301 



Expansion of the wings 4^ — 5 lines. Head greyish-black ; 

 anterior wings greyish-black, with an interrupted slightly-angu- 

 lated whitish fascia before the middle, nearest the base of the 

 wing on the costa ; beyond the middle are two whitish oppo- 

 site spots, the costal spot being the larger and more posteriorly 

 placed. 



The pale yellow larva mines down the leaves and stems of 

 Dae ty lis glomerata in April and May. 



The perfect insect appears in June ; it occurs generally through- 

 out England, also near Edinburgh and Frankfort-on-the-Maine. 



14. Elachista Kilmunella, Stainton. 



Most nearly allied to the preceding, but distinguished by the 

 duller, blunter anterior wings, the fascia being often obsolete 

 towards the costa, and the opposite spots duller and more nearly 

 opposite. Airce is a blacker insect, and the fascia is altogether 

 more indistinct. 



Expansion of the wings 4| — 5 lines. Head dark grey ; an- 

 terior wings dingy dark grey, with a nearly straight whitish 

 fascia before the middle, frequently obsolete towards the costa, 

 and two opposite whitish spots towards the hind margin, that on 

 the costa being rather posterior. 



In the female frequently the basal portion of the wing is suffused 

 with whitish, especially along the inner margin. 



The larva, which is yellowish-grey, mines the leaves of a Carex 

 in April and July. 



The perfect insect appears in June and August, and occurs in 

 various parts of Scotland and in Lancashire. 



15. Elachista Helvetica, Frey. 



This appears to differ from the preceding two species by the 

 purer white markings, and from Holdenella by the form of the 

 costal spot, which in that species is somewhat quadrate ; in Hel- 

 vetica it is triangular. 



Expansion of the wings 4J lines. Head greyish-black ; an- 

 terior wings greyish-black, with a faint brownish tinge ; before 

 the middle is a broad, rather curved pure white fascia, bro&dest 

 on the inner margin ; beyond the middle are two white opposite 

 spots, that on the costa being the posterior. 



Larva unknown. 



The perfect insect has occurred near Ziirich. 



vol.. IV. N. S. PT, VIII. JULY, 1858, Y 



