62 
TOETEICID^. 
scales above the shining white ocellated S2)0t, which contains two or more black streaks or 
spots; the cilia white^ irrorated with fuscous. Hind wing pale brownish grey; vein 4 
jji-esent. 1 , 2 ? . Expanse of wings 18 millims. 
Mount Shasta^ &c., California^ August and September 1871. 
Semasia pallidicostana. (Plate LXXIV. fig. 6.) 
Palpi shortj white, clothed to the apex ; head white ; thorax white, somewhat tinged with 
grey posteriorly ; antennre greyish. Fore wings — with the costa slightly arched ; apical margin 
scarcely concave below the apex — -olivaceous grey; milky white along the costa, with some 
fuscous-grey (sometimes pale brownish) oblique streaks beyond the michlle ; an ocellated spot 
above the anal angle, lined with sublustrous grey, narrowly on the outer, widely on the inner 
edge, with two broken black streaks across it. Hind wings brownish grey, the veins and 
margins more darkly indicated; vein 4 present; cilia whitish grey. 1 J', 1 ? . Expanse 
of wings 17 millims. 
May and June 1871, Sonoma and Lake Counties, California. 
Allied to the "Anchylopera " striatana of Clemens, which is the " Pceclisca albicepsana " of 
Walker, but wanting the white middle streak along the cell. 
Semasia infuscana. (Plate LXXIV. fig. 7.) 
Head cinereous, sometimes brownish above : palpi projecting about the length of the head 
beyond it ; cinereous : antennae pubescent in the male. Fore wings — more than twice as 
long as wide ; apical margin oblique, slightly indented in the middle — cinereous, much clouded 
with brownish fuscous, especially about the costal half of the wing, the line of demarcation 
being waved or angulated ; the pale, almost obsolete ocellated spot contains a few black scales, 
and is preceded by a triangular fuscous-brown shade on the dorsal margin ; the apex and 
upper half of the apical margin brownish, partly obscured by a fuscous shade extending 
through the cilia. Hind wings pale fuscous ; cilia greyish ; vein 4 present. 1 J* , 1 ^ . 
Expanse of wings 21 millims. 
San Francisco, May 1871. 
Semasia? oregonana. (Plate LXXIV. fig. 8.) 
Head cinereous, tufted above : palpi short; the second joint thickly clothed ; third joint 
comparatively bare : antennae pubescent in the male. Fore wings fuscous grey, more or less 
faintly shaded with cinereous or brownish-fuscous streaks and spots. The more usual variety 
is nearly unicolorous, with a few streaks only visible towards the apical portion of the wing 
and with a very faintly indicated basal patch outwardly angulated about the middle. A more 
strongly-marked variety, female, has the basal patch more distinctly defined, covering the basal 
