COSMOPTERYX, 229 
is close to the furcate subdorsal vein. In the posterior wings the-veins 
and branches are obsolete. 
Three species of surpassing beauty constitute this genus, but 
one of them has not yet been found in Britain. The larvee of 
none are Anown; but the larva of Drurella is pretty strongly 
suspected : it mines in the leaves of the hop in September, when 
full fed quitting the leaf and forming a fine white cocoon, within 
which the larva remains unchanged during the winter, hence the 
perfect insect is difficult to rear. Mr. Douglas had collected a 
number of these larvee in the autumn of 1852, but many escaped 
from his breeding cage, and the remainder died; in the following 
July he found a specimen of the perfect insect on the window of 
the room where he had kept his larvee; subsequently Mr. Wing 
discovered some of the perfect insect (not previously known to 
occur in this locality) by beating the hop-plant, the leaves of 
which had furnished the mining larvee the previous autumn. I 
therefore conclude that these miners are the larvae of Drurelia, but 
that they are so is not yet proved. 
1. Drurella, Fab. 8. E. 666, 64 (1775).—Druryella, Zell. Ent. 
Zte. 1850.—Zieglerella, Hiib. Tin. 306; Evers.—evimia, Haw. ; Step, 
Alis anticis atris, fascia obliqua argentea prope basim, fascia recta in 
medio, fasciaque posteriore obliqua violaceo-argenteis, spatium triangu- 
lare saturate aurantium includentibus, strigulis duabus argenteis, altera 
supra angulum analem, alteva in ipso apice. ixp. al. 4 lin. 
Head dark fuscous, metallic. Face and palpi rather silvery. An- 
tennee black, with a ring before the apex, and the apex white. Ante- 
rior wings black, with an oblique silvery fascia near the base (nearest the 
base on the costa), a nearly straight fascia in the middle, and an 
oblique fascia beyond the middle silvery-violet (this last fascia is near- 
est the base on the inner margin); the triangular space included be- 
tween these two fascize is deep orange, margined with black; above the 
anal angle is a short silvery streak, and another is in the extreme apex 
of the blackish cilia. Posterior wings blackish, with paler cilia. 
Truly, as Haworth says, “species formosissima;” it has oc- 
curred in some plenty in several localities near London in July ; 
it was reputed to frequent a willow-tree at Hackney, probably 
because some hops grew in the vicinity. 
2. Lhienigiella, Zcll. Isis, 1846. p. 298; Sta. Alis anticis sa- 
turate ochreis, strigulis tribus tenuibus ex basi albo-argenteis, prima 
costali mox deflexa et ante medium desinente, secunda supra plicam, 
tertiaque dorsali in medio desinentibus, macula in medio costa albida, 
punctis quinque plumbeo-argenteis pone medium in circulo positis, 
pone hace strigula argenteo-alba in apice extremo decurrente. xp. al. 
44-5 lin. 
= slut eee, ee eee eee 
q 
