P^DISCA. 
41 
fold in the male not closely appressed, its lower edge nearly straight, not convex ; costa much 
arched ; apex produced, nearly falcate, the apical margin deeply impressed below it — sub- 
ochreous white, rather cream-coloured, sometimes tinged or faintly spotted with greyish ; the 
basal third of the wing Avith several black spots ; some fawn-coloured abbreviated costal 
streaks, sometimes mixed with fuscous ; the ocellated spot almost obsolete, sometimes with 
one or two black dots within it : cilia whitish, black at the apex. Hind wings rather rosy 
whitish grey. 2 cS , 3? . Expanse of wings 19 millims. 
Lower Lake, California, June 22nd, 1871. 
This species, with the following one, may perhaps form the type of a new genus. In the 
almost falcate apex and the greatly rounded costa it would approach the genus Phoxopteryx ; 
but the costal fold in the male, if we follow Heinemann's arrangement, must place it, at least 
provisionally, iu the genus Pcedisca. 
PaBdisca? sufcplicana. (Plate LXIX. fig. C.) 
Palpi more than twice as long as the head, fully clothed ; the apical joint concealed : head 
tufted above : these and the antennae cinereous grey. Fore Avings — Avith the costa much 
arched or rounded, the apex produced, almost falcate ; apical margin deeply impi'essed below 
it; costal fold in the male not closely appressed, the inner edge straight, a shining metallic 
line visible beneath it — mouse-coloured, much irroratcd Avith leaden-grey scales ; a very 
narrow darker fascia extending from the middle of the costa to the anal angle ; the ocellated 
spot almost undistinguishable ; some abbreviated leaden-grey costal streaks : cilia grey, darker 
at the apex, with a pale line along their base. Hind Avings greyish cinereous. Abdomen tufted 
in the male. ? . The fore wings paler than in the male, being more suifused than irroratcd 
with light leaden grey; the fascia obsolete. 3 J*, 2 ? . Expanse of wings 21 millims. 
Mendocino County, California, May 1871, and in Oregon. 
Pasdisca nigralbana. (Plate LXIX. fig. 7.) 
Head greyish fuscous in front above, whitish behind ; face Avhite : palpi white, touched 
with greyish fuscous toAvards the tips ; apical joints not exposed : antennaj greyish fuscous. 
Fore wings more than twice as long as wide, with the costa slightly arched; apical margin slightly 
sinuated, scarcely oblique : the costal fold in the male long and narrow, not closely appressed, 
reaching nearly half the length of the Aving : the apical half of the wing is divided into three 
portions — the 1st an oblique ferruginous-brown fascia, widest towards the dorsal margin, and 
touched with fuscous especially along its edges ; the 2ik1 bluish grey, externally margined 
with fuscous ; the 3rd bright ferruginous, extending to the apex, interrupted by some white 
geminated streaks from the costa ; each pair divided by a slender black line : along the upper 
portion of the apical margin is a black line at the base of the cilia, Avhicli are touched Avith 
brown and fuscous ; towards the base, on the dorsal half of the wing, are some irregular 
G 
