SEMASIA. 
61 
not indented — whitish^ delicately spotted with fuscous : the costa Avith abbreviated fu scons 
streaks beyond the middle; an indistinct, rather shining, ocellated spot above the anal angle, 
containing two black streaks ; several irregular fuscous spots and irrorations towards the base 
of the wing : cilia white, irrorated with fuscous. Hind wings whitish ; vein 4 absent . 1 , 1 ? . 
Expanse of wings 10 millims. 
Siskiyou County, California, Sept. 3rd, 1871. 
Semasia argenticostana. (Plate LXXIV. fig. 4.) 
Palpi short; the second joint thickly clothed with long hairs below, giving them a trian- 
gular appearance ; these, with the antenuES, head, and patagia whitish grey. Fore wings— fully 
three times as long as wide, apex produced, acute ; apical margin concave ; the costa (without 
a costal fold in the male) not arched ; the dorsal margin convex towards the base — dusky 
fawn-grey, with a silvery-white streak along the costa from the base to beyond the middle, 
where it leaves the costa and is divided into narrow, waved, and ragged branches, the vipper 
one reaching to a small triangular white spot at the apex ; a silvery-white streak along the 
middle of the wing, not sharply pointed, extends nearly to the ocellated patch, which is whitish, 
containing several small black spots ; the dorsal margin is dull grey; cilia whitish, thickly 
speckled with grey. Hind wings pale brownish grey, with whitish cilia ; vein 4 present. 
1 (^,2 ? . Expanse of wings 21 millims. 
Northern Oregon, April 17th, 1872. 
This species must be nearly allied to the GrajihoUtha spiculana of Zeller (Verh. z.-b. Ges. 
Wien, XXV. p. 289, pi. ix. fig. 23) ; but Prof. Fernald, who is well acquainted with the type in the 
Cambridge (Mass.) Museum, assures me that it is quite distinct. Tlirough the kindness 
of Prof. Zeller I have had the opjjortunity of comparing it with his original drawing of G. 
spiculana, from which it difi:ers chiefly in the form of the costal markings near the apex and 
in the more blunted termination of the narrower middle streak, also in the absence of a spot 
on the middle of the costa. 
Semasia griseocapitana. (Plate LXXIV, fig. 5.) 
Head and palpi yellowish white ; the palj^i roughly clothed with long scales projecting 
beyond the apical joint, touched with fuscous towards the apex ; antennaj slightly pubescent 
in the male. Fore wings — with the costa somewhat arched; hind margin oblique, slightly 
concave — yellowish white, streaked and irrorated with olive-brown ; some straight olive-brown 
streaks across the middle of the wing near the base, with spots of the same colour along the 
costa above them ; the costa towards the apex and the upper part of the apical margin 
yellowish ochreous, streaked obliquely from the costa with brown and shining white ; a con- 
spicuous shining white wedge-shaped mark near the apex, and a shade of irrorated fuscous 
