SEMASIA. 61 



not indented — whitish, delicately spotted with fuscous : the costa with abbreviated fuscous 

 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 cj , 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 antennse, 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 upper 

 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 Grapholitha spiculana of Zeller (Verb. 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. Through the kindness 

 of Prof. Zeller I have had the opportunity of comparing it with his original draAving of G. 

 spiculana, from which it differs chiefly in the form of the costal markings near the apex and 

 in the more bliinted 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 palpi roughly clothed with long scales projecting 

 beyond the apical joint, touched with fuscous towards the apex; antennse 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 irroi'ated fuscous 



