GO TOETEICID/E. 



conspicuous one being about the middle, extended towards the rather shining white ocellated 

 spot, which contains two black streaks, and is surrounded by a cinereous shade : an ob]iqu.e 

 abbreviated cinereous streak above the dorsal margin, before the middle of the wing, is pre- 

 ceded by a pale reddish ochreous shade along the base of the dorsal margin : cilia white, 

 tipped and dusted with cinereous. Hind wings whitish with a faint rosy tinge ; vein 4 pre- 

 sent in the form of a short fork from vein 3 very near the margin. 1 (^ , 1 ? . Expanse of 

 wings 15 millims. 



September 3rd, 1871, Siskiyou County, California. 



Semasia parvana. (Plate LXXIV. fig. 1.) 



Palpi scarcely longer than the head, greyish above, fuscous at the sides ; antennse greyish 

 fawn. Pore wings — three times as long as wide, the apical margin slightly concave — whitish 

 ochreous with a slight fawn-coloured tinge, streaked and dusted with cinereous ; some abbre- 

 viated streaks along the costa, that in the middle being the most conspicuous ; an irrorated 

 cinereous shade along the dorsal half of the wing, extending to the rather ochreous ocellated 

 spot, which contains some lustrous white scales and two black streaks : a cinereous line along 

 the apical margin before the base of the cilia, which are ochreous white, dusted with cinereous. 

 Hind wings very pale greyish white ; cilia white. 2 (^ . Expanse of wings 11^ millims. 



April 1872, North Oregon. 



This species is very like Semasia tenuiana in general appearance, but is smaller and rather 

 more ochreous ; moreover the venation of the hind wings is diiferent, vein 3 having no branch 

 near the hind margin as in that species. 



Semasia stramineana. (Plate LXXIV. fig. 2.) 



Head, palpi, antennae, and fore wings pale straw-colour, the latter more than three times 

 as long as wide ; the apical margin slightly concave ; the male with several short oblique 

 brown streaks from the costa, alternated with shining whitish towards the apex; a slight 

 ochreous shade before the sublustrous ocellated spot, which contains the usual two black 

 streaks ; a narrow brown line along the apical margin, and a line of fuscous scales at the base 

 of the cilia. Female — fore wings nearly unicolorous ; the costal streaks and the line along the 

 apical margin scarcely indicated. Hind wings whitish; vein 4 absent. 1 cj, 1 ? . Expanse 

 of wings 11^ millims. 



Denver, July 1872. 



Semasia minimana. (Plate LXXIV. fig. 3.) 



Head whitish ; the palpi whitish, touched with greyish fuscous at the sides ; antennae 

 whitish. Fore wings — more than three times as long as wide, the apical margin very oblique. 



