
LEUCOPTERA.—OPOSTEGA. 349 
base of the cilia at the extreme apex ; in the cilia beneath the apex is a minute black dot, accompanied 
by a few metallic silvery scales beneath it, this, together with the slight apical shade, giving the appear- 
ance of an incised margin, whereas these markings are only in the cilia the wing-apex being narrowly 
produced upward; cilia pure white. Hp. al. 6 mm. Hindwings tapering acutely; silvery grey ; 
cilia pure white. Abdomen silvery white. Legs silvery white; the hind tibiae hairy above and 
beneath. . 
Type 2 (66816) Mus. Wlsm. (Godm-Salv. Coll.) BM. [PT. (66817) US, Nat. Mus.] 
Hab. Mexico: Guerrero: Sierra de las Aguas Escondidas, 9500 ft., VII. (H. H. 
Smith). ‘Two specimens. 
3. Leucoptera salicis, sp. n. (Tab. X. fig. 5.) 
Antennae yellowish brown; eye-caps broad, smooth, white. Paipi minute, dependent. Head smooth, white ; 
the face with a faint golden tinge. Thorax white. Forewings silvery white, with a pair of short, 
outwardly oblique, pale greyish fuscous, costal streaklets beyond the middle, their points slightly 
diverging, the space between them pale golden yellow; these are succeeded by a shorter, less oblique, 
pale fuscous costal streaklet, geminate at its base, pointing like the others in the direction of a pale 
golden metallic terminal spot, of which the inner end consists of raised dark golden-brown scales, and 
its outer end of similar raised black scales; the apex of the wing above this is tinged with golden 
yellow, and a slight darker curved line runs through the apical cilia, of which the outer ends are white, 
except at the extreme apex. Exp.al.8 mm. Hindwings very pale, shining, bone-greyish ; cilia white. 
Abdomen white. Legs white, hind tarsi slightly shaded. 
Type & (7267) Mus. Wlsm. BM. 
Hab. Mexico: Mexico: Mexico City, © Salix sp., ex VI. 1894 (F. Gudmann). 
Unique. 
OPOSTEGA Z. 
Type: Elachista salaciella Tr. 
Ovosteca Z. Isis 32:1839 214 no. 39 sp. 1-6 (1839): Linn. Ent. 3 250, 279-86, 344 sp. 1-4 
(1848) : 2 Pf. 2: 40-3 (1847) ; Stn. Ins. Br. Lp-Tin. 283, 288-90 no. 4 sp. 1-3 Pf. 8: 92° 
(1854); Wlsm. Pr. Z. Soc. Lond. 1897 139-41 no. 81 sp. 208-11 (1897) ; Stgr-Rbl. Cat. Lp. 
Pal. 2 220 no. 4383 sp. 4278-83 (1901); Dyar Bull. US. Nat. Mus. 52 547 sp. 6227-31 
(1902); Wlsm. Fn. Haw. 1 711-12, 753 no. 51 sp. 414-5 Pf. 25° 12-13 (1907). 
1. Opostega perdigna, sp.n. (Tab. X. fig. 6.) 
Antennae aeneous; eye-caps white. Head white. Thorax white, with a brassy gloss. Forewings white, 
with a brassy gloss; a small golden brownish dorsal spot, scarcely beyond one-third, a small elongate 
costal shade of the same colour a little beyond the middle, and a golden brown patch at the apex, with 
two converging costal streaks, coming through the cilia and terminating in its outer extremity, beyond 
which is a black triangular dot with a wedge-shaped golden brown patch in the cilia beyond it; 
terminal and tornal cilia whitish, with a faint brassy brown lustre. Hap. al.12 mm. Hindwings 
and cilia pale greyish brown. Abdomen greyish brown. Legs with bristly tibiae and tarsi; pale 
aeneous. 
Type 2 (66818) Mus. Wlsm. BM. 
Hab. Mexico: GUERRERO: Omilteme, 8000 ft., VII. (HZ. H. Smith). Unique. 
