174 GLYPHIPTERYGID ©. 
In habit all the perfect insects of this genus are true day- 
fliers, flying in the sunshine from May to July; and when at 
rest alternately raising and depressing the wings, which cha- 
racteristic may easily be observed with Zhrasonella, which may 
be found swarming amongst rushes everywhere in June; fwsco- 
viridella has the same peculiarity, though in a less degree than 
the other species, it frequents flowery places among short grass, 
in May and June; the little M%scheried/a shows no especial par- 
tiality for any particular plant, but I have often observed it sit- 
ting on the flowers of Anthriscus sylvestris, the white petals of 
which served to show off to advantage the nearly black wings of 
the elegant species; I have also observed it swarming round the 
twigs of young fir-trees. 
None of the larvee of this genus were known till Mr. Weir 
discovered last summer that of equited/a, feeding inside the shoots 
of the Sedum acre; it exhibited no peculiarity in structure; the 
larvee of the other species still remain undiscovered. 
1. fuscoviridella, Haw. L. B. 569 (1829); Step.—aldicostelia, 
Dup. xi. pl. 302. f. 3. Alis anticis viridi-eneis, ipsa costa pone me- 
dium alba. Exp. al. 6-64 lin. 
Head and face dark bronzy-green. Palpi fuscous. Antenne dark 
fuscous. Anterior wings shining bronzy-green, with the extreme costa 
beyond the middle white ; cilia pale bronzy-green, with the tips white. 
Posterior wings grey, with paler cilia. 
Very abundant in flowery meadows, and in open places in 
woods, from the middle of May to the middle of June. 
2. Thrasonella, Scop. I’. C. 253. 658 (1763); Dup. xi. pl. 304. 
f. 1,2; F.v. R. pl. 83. f. 1—WPueslella, Kab.—Fyeslella, Fab. ; Step. 
—Seppella, Hiib.—triguttelia, Don.—Aillyelia, Wiib.—equitella, vay. 
Seppella, Treit. Alis anticis saturate viridi-zneis, strigulis quinque 
costee (ad costam ipsam albis) strigulisque duabus dorsi (prima media 
Sere obsoleta) ceruleo-argenteis, macula oblonga ad angulum analem atra, 
puncta tria violaceo-argentea includente, apice saturate /usco-squamato. 
Exp. al. 6-64 lin. 
Head and face dark fuscous. Palpi whitish, with two dark fuscous 
rings. Antenne fuscous. Anterior wings dark bronzy-green, with five 
bluish-silvery streaks from the costa, which are white immediately on 
the costa, with a faint bluish-silvery streak from the middle of the inner 
margin, and a more distinct one towards the anal angle; above the 
anal angle is a black blotch, enclosing three silvery-violet spots; at the 
apex are a few dark /uscous scales ; cilia greenish-bronze, with the tips 
whitish. Posterior wings grey, with paler cilia. 
Very abundant amongst rushes in June and July, throughout 
the country. ‘There is considerable diversity in the size of the 
