58 T0ETE1CIDJ5. 



and a pale ocellutcd spot above the anal angle, including two black spots, externally margined 

 by bluisli lustrous scales. Hind wings whitish grey, with a faint tinge of reddish brown 

 towards the margins; vein 4 absent. 3 (^, 1 $ . Expanse of wings 13-16 millims. 

 April 17th, 1872, North Oregon, near the Columbia River. 



Semasia decempunctana, (Plate LXXIII. fig. 6.) 



Head, palpi, and antennae grey ; palpi short, well clothed, the apical joint not exposed ; 

 patagia brownish buff. Fore wings — with the costa scarcely arched; apical margin very 

 oblique, not concave ; dorsal margin rounded near the base — greyish white, a rusty buff- 

 coloured shade at the base, blending into tbe pale ground-colour beyond ; the first third of the 

 wing with a wedge-shaped projection on its outer edge, reaching neai-ly to the middle ; an 

 indistinct narrow oblique biiff-brown fascia beyond the middle, some white-margined buff 

 spots on the costa beyond it, and a buff line, internally white-margined, along the upper half 

 of the apical margin; an ocellated spot above the anal angle is divided transversely by a 

 double row of ten black dots, and contains some faint silvery lines. Hind wings whitish grey, 

 shaded witb greyish brown along the margin; vein 4 is present in this species. 4 J* . 

 Expanse of wings 18 millims. 



Fort The Dalles, Oregon, April 20th, 1872. 



Semasia perangustana. (Plate LXXIII. fig. 7.) 



Face whitish.; the head rather greyish ochreous above; palpi projecting rather more 

 than tbe length of the head beyond it, dusky whitish; the antennae less than half the length 

 of the fore wings, not pubescent. Fore wings — more than three times as long as wide, the 

 apical margin very oblique, scarcely indented ; the costa very slightly arched — olivaceous 

 ochreous, sparsely irrorated with a few fuscous scales; some rather shining whitish costal 

 streaks beyond the middle, with some few fuscous scales between them, and a pale rather 

 shining whitish ocellated spot above the anal angle, including two or more short black streaks ; 

 a fuscous line along the apical margin at the base of the cilia, which are shaded with fuscous 

 along their middle, but tipped with white. Hind wings greyish; vein 4 absent. 2 cj. 

 Expanse of wings 15 millims. 



June 1872, Siskiyou Mountains, extreme north of California. 



Semasia lapidana. (Plate LXXIII. fig. 8.) 



Palpi compactly clothed, rather club-shaped, moderately short, projecting scarcely the 

 lengtb of the head beyond it; the apical joint not exposed; together vpith the head mixed 

 greyish white and fuscous : antennae in both sexes scarcely pubescent. Fore wings — three 

 times as long as wide, the costa scarcely arched ; apex rounded ; apical margin very oblique 

 ■ — yellowish stone-colour, densely irrorated with greyish-white and greyish- fuscous scales: an 



