of the Genus Elactdsta. 297 



4. Elachista Mngmjicella, Tengstroin. 



Best distinguished from all the allied species by the central 

 fascia stopping short long before it reaches the costa. 



Expansion of the wings 4 lines. Head blackish ; anterior 

 wings rich brown, with a pale golden fascia near the base, a pale 

 golden fascia form spot on the middle of the inner margin, reaching 

 only half across the wing, a smaller pale golden spot on the inner 

 margin near the anal angle, and beyond it on the costa is a large 

 spot of the same colour. 



Larva unknown. 



7 he perfect insect appears at the end of July and beginning of 

 August; it occurs near Bristol, and in Finland ; also at Ratisbon 

 in Bavaria, and in Silesia. 



5. Elachhla Nohilella, Fischer. 



Closely allied to E. Gleichenella, but the anterior wings nar- 

 rower, browner, and the apical spot placed nearer the hind margin 

 and more detached from the opposite spots, so as not to convey 

 so much the^ame idea of a fascia. 



Expansion of the wings 3\ — Sg lines. Head grey ; anterior 

 wings brown, with the base pale gulden ; in the middle is a pale 

 golden fascia, nearer the base on the costa than on the inner 

 margin ; beyond the middle are two opposite pale golden spots, 

 and beyond them at the apex of the wing is a third. 



Larva unknown. 



The perfect insect appears in June and July ; it occurs in Si- 

 lesia and Bohemia ; also at Vienna, Freiburg, Zurich and Pisa. 



Observation. — Frey describes the markings as silvery, rather 

 than pale golden, and this seems indeed to be the case with a 

 Zurich specimen I have before me ; a specimen from Glogau has 

 the markings decidedly pale golden, indeed yellower than in 

 Gleichenella. Have we two species mixed as Nobilella? 



6. Elachista Gleichenella, Fabricius. 



Readily distinguished by the opposite spots being united by an 

 intermediate spot placed posteriorly, so forming an angulated 

 fascia (hence Tengstrom's name Tri/asciella). 



Expansion of the wings 3g lines. Head bronzy ; anterior 

 wings black ; the base, a slender rather oblique fascia in the 

 middle, and an angulated fascia beyond the middle, pale golden. 

 This last fascia is composed as it were of two opposite spots (that 



