P^DISCA. 
49 
a subconvox appressed costal fold near the base — fawn- coloured^ profusely irrorated with 
greyish shining scales assuming the form of wavy lines, one of which runs parallel with and 
near to the apical margin ; the cilia fawn-colour : underside of fore wing much shaded with 
pale brownish fuscous. Abdomen and hind wings pale greyish fuscous, the latter above some- 
times shaded along the margin, with paler cilia, beneath greyish white, reticulated with 
brownish fuscous along the costal margin. 5 (J . Expanse of wings 28 niillims. 
Mendocino County, June 7th-10th, 1871. 
Psedisca perdricana. (Plate LXXI. fig. 6.) 
Head, palpi, and thorax pale fawn-colour ; antennte the same, pubescent. Fore wings — 
with the appressed costal fold near the base irrorated with fuscous — very pale fawn-colour, 
irrorated with numerous brown and fuscous scales, which have a tendency to run in wavy 
lines, first sloping obliquely outward from the costa, then turning parallel to the apical 
margin ; there are a few single black scales above the anal angle. Hind wings pale fuscous 
bi'own, with paler cilia. 2 . Expanse of wings 19 millims. 
Burney Falls, Shasta County, July 20th, 1871. 
Nearly allied to P. irrorutana, but a much smaller species, and without the lustrous 
scales which distinguish it, otherwise greatly resembling it in general appearance. The di- 
stinction between the two species appears to be that in P. irroratuiia the ground-colour of the 
wing is dark with paler markings, whereas iu P. perdricana the ground-colour is pale and the 
markings are darker. 
Psedisca passerana. (Plate LXXI. fig. 7.) 
Head cinereous brown above, face ochreous white ; palpi cinereous, thickly clothed, espe- 
cially beneath, apical joint not exposed ; antennse greyish fuscous ; the patagia dusty whitish. 
Fore wings — costa slightly arched, apical margin oblique — greyish white, streaked, shaded, 
and blotched with dull brown ; a brown half-fascia from the dorsal margin near the base, 
another usually wider from the dorsal margin beyond the middle ; a dull brown shade along 
the costa and at the apex, in which are several geminated costal streaks of the pale ground- 
colour ; a pale greyish rather shining spot above the anal angle, divided by an irregular brown 
streak. Hind wings brown, with paler cilia. 4 ^ . Expanse of wings 15 millims. 
Mendocino County, California, June 9tli & 10th, 1871. 
Psedisca glomerana. (Plate LXXI. fig. 8.) 
Palpi extending more than the length of the head beyond it ; the second joint clothed 
with long scales ; the apical joint freely exposed ; together Avith the head dull greyish white, 
irrorated with fawn-colour : antennae slightly pubescent. Fore wings — two and a half times as 
long as wide, the costa scarcely arched, with appressed costal fold in the male ; the apical 
H 
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