302 Mr. H. T. Stainton's Syiiopsis 



16. ElacMsta Holdenella, Edleston. 



Best distinguished by tlie sub-quadrate form of the white costal 

 spot. 



Expansion of the wings 5 lines. Head grey ; anterior wings 

 greyish black, darker towards the apex ; before the middle is an 

 oblique whitish fascia, nearest the base of the wing on the costa ; 

 beyond the middle are two opposite spots, that on the costa being 

 the posterior, more distinct and whiter, and not triangular, its apex 

 being truncate. 



Larva unknown. 



A single specimen, taken near London, is in the collection of 

 Mr. Edleston. 



17. Elachista Nigrella, Hiibner. 



Closely allied to Stabilella and Gregsoni ; Stabilella is best dis- 

 tinguished by the whiter head and more oblique fascia ; Gregsoni 

 is rather a blacker insect, and in the female the spots are more 

 exactly opposite. 



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

 wings dark grey, with a rather indistinct whitish fascia before the 

 middle, placed rather obliquely, and beyond the middle are two 

 rather indistinct whitish opposite spots, that on the costa slightly 

 posterior ; at the apex of the wing is a whitish spot in tlie cilia. 



Female. — Expansion of the wings 4 lines. Head dark grey ; 

 anterior wings dark grey, blackish posteriorly with a distinct 

 whitish fascia, very slightly oblique, before the middle, and two 

 conspicuous whitish opposite spots beyond the middle, that on the 

 costa slightly posterior ; at the apex of the wing is a whitish spot 

 in the cilia. 



The larva, which is yellowish grey with a pale brown head, 

 mines the upper part of the leaves of Poa trivialis, &c., in April 

 and July. 



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

 it occurs throughout England and Scotland, and in various parts 

 of Germany. 



.4; 18. Elachista Gregsoni, Stainton. 



Distinguished from Stabilella by the broader anterior wings and 

 less oblique fascia ; from Nigrella, to which it is very closely 

 allied, by the spots in the female being more exactly opposite, and 

 by the black head of the larva. 



