of the Genus Elachista. 319 



rather distinct blackish hinder-marginal line, the extreme tips pale 

 greyish. 



Larva unknown. 



The perfect insect appears in June ; it occurs near Vienna. 



60. Elachista Anserinella, Fischer. 



Readily distinguished from the three preceding species by the 

 entire absence of any scattered dark scales on the anterior wings ; 

 at the same time the ochreous fasciae, though sometimes rather in- 

 distinct and vague, serve to distinguish it from every other species 

 of the genus. 



Expansion of the wings 4 — i\ lines. Head whitish ; anterior 

 wings whitish, with a faint fuscous tinge along the costa at the base; 

 near the base is a faint ochreous fascia rarely distinct ; beyond the 

 middle the apical portion of the wing is almost entirely ochreous, 

 leaving only two or three small patches of the pale ground colour ; 

 cilia yellowish white, intersected by a fuscous hinder marginal 

 line ; posterior wings dark grey, with yellowish grey cilia. 



Larva unknown. 



The perfect insect appears in May and June ; it occurs in Bo- 

 hemia and at Vienna, also in Tuscany. 



61. Elachista Rufocinerea, Haworth. 



This species is intermediate between Anserinella and Rudectella. 

 The female, which alone approaches to Anserinella, is distinguished 

 by the darker, coarser scales, forming rather longitudinal streaks 

 than fasciae ; from Rudectella, Rufocinerea is abundantly distin- 

 guished by its longer anterior wings, the dark scales being 

 brownish instead of grey, and there being no indication of a pale 

 central fascia. 



Male. — Expansion of the wings 4A — 5 lines. Head whitish ; 

 anterior wings whitish, much suffused with brown, the inner 

 margin and a streak along the disc alone remaining of the paler 

 ground colour. 



Female. — Expansion of the wings 4 — 4^ lines. Head white; 

 anterior wings whitish, with numerous scattered scales of a 

 yellowish-brown tint, leaving the inner margin and a streak along 

 the disc entirely whitish. 



The pale dull yellow larva, which has the dorsal vessel greenish 

 grey, makes long brown inconspicuous mines in Holcus mollis and 

 other grasses during the winter months. 



z 2 



I 



