_—- -) 
=O 
286 LYONETID A. 
_ Head whitish. Face and palpi white. Antenne pale fuscous; the 
basal joint white. Anterior wings white, with two somewhat indis- 
tinct /uscous lines from the base to beyond the middle, including between 
them posteriorly a fuscous blotch; a smaller fuscous blotch lies at 
the base of the inner margin; beyond the middle is an angulated fus- 
cous streak from the costa which reaches only to the fold, beyond it is 
another less angulated fuscous streak which reaches to the inner mar- 
gin; beyond this are two other short costal streaks; at the apex of the 
wing is a black spot, from which three fuscous streaks radiate in the 
white cilia, and below it is a fuscous hinder-marginal line; the apical 
portion of the wing is frequently suffused with pale fuscous. Pos- 
terior wings whitish, with white cilia. 
Hitherto scarce ; appears in July and autumn, hybernated spe- 
cimens occurring in the spring. ‘The larva feeds in June, Au- 
gust, and September, in the underside of smooth-leaved willows 
(principally on Swix heliv), making a large blotch. 
Genus II], CEMIOSTOMA. 
Crmtostoma, Zell. L. B. iii. 272 (1848). Leucoptera p., Hib. Ar- 
gyromiges p., Step. Opostega p., Zell. Isis, 1839; Dup. 
Capilli. squamacei, appressi. Antenne alis anterioribus breviores, con- 
chula basali medioeri. Palpi nulli. Ale anteriores caudulatz, pos- 
teriores anguste lanceolate; anteriores: cellula discoidalis venas 
duas in costam emittit, vena mediana in marginem posticum excur- 
rit, vena subdorsalis simplex; posteriores: vena mediana in tres 
ramos divisa. 
Head smooth, with appressed scales. Antenne shorter than the an- 
terior wings, the basal joint forming a moderate-sized eye-cap. Palpi 
none. Anterior wings caudulate, the posterior narrow, lanceolate. In 
the anterior wings the discoidal cell emits two veins to the costa; the 
median vein runs into the hinder margin; the subdorsal vein is simple. 
In the posterior wings the median vein divides into three branches. 
Scitella differs from the characters above laid down, in having 
the slender scales at the back of the head erect, and in the ante- 
rior wings the discoidal cell emits a furcate vein to the costa, a 
simple one before the apex, and three (two of them obsolete) to 
the hinder margin, and in the posterior wings the median vein 
has two branches obsolete. 
The insects of this genus, of which very few are at present 
known, and we have only three British species, are remarkable 
for their beauty. ‘The radiating dark lines in the cilia are more 
developed in this than in the preceding genus. 'The larva are 
