P^DISCA. 41 



fold in tlie male not closely appressed^ its lower edge nearly straight^ not convex ; costa much 

 arched ; apex produced^ nearly falcate^ the apical margin deeply impressed below it — sub- 

 ochreous white^ rather cream-coloured^ sometimes tinged or faintly spotted with greyish ; the 

 basal third of the wing with several black spots j some fawn-coloui'ed abbreviated costal 

 streaks, sometimes mixed with fuscous ; the ocellated spot almost obsolete, sometimes with 

 one or two black dots within it : cilia whitish, black at the apex. Hind wings rather rosy 

 whitish grey. 2 c? , 3 $ . . Expanse of wings 19 miilims. 

 Lower Lake, California, June 22nd, 1871. 



This species, with the following one, may perhaps form the type of a new genus. In the 

 almost falcate apex and the greatly rounded costa it would approach the genus Phoxopterijx ; 

 but the costal fold in the male, if we follow Heinemann's arrangement, must place it, at least 

 provisionally, in the genus Pmdisca. 



Psedisca? subplicana. (Plate LXIX. fig. 6.) 



Palpi more than twice as long as the head, fully clothed ; the apical joint concealed : head 

 tufted above : these and the antennae cinereous grey. Fore wings — with the costa much 

 arched or rounded, the apex produced, almost falcate ; apical margin deeply impressed below 

 it ; costal fold in the male not closely appressed, the inner edge straight, a shining metallic 

 line visible beneath it — mouse-coloured, much irrorated with leaden-grey scales ; a very 

 narrow darker fascia extending from the middle of the costa to the anal angle ; the ocellated 

 spot almost undistinguishable ; some abbreviated leaden-grey costal streaks : cilia grey, darker 

 at the apex, with a pale line along their base. Hind wings greyish cinereous. Abdomen tufted 

 in the male. $ . The fore wings paler than in the male, being more suffused than irrorated 

 with light leaden grey; the fascia obsolete. 3 cj", 2 ? . Expanse of wings 21 miilims. 



Mendocino County, California, May 1871, and in Oregon. 



Psedisca nigralbana. (Plate LXIX. fig. 7.) 



Head greyish fuscous in front above, whitish behind; face white : palpi white, touched 

 with greyish fuscous towards the tips ; apical joints not exposed : antennse greyish fuscous. 

 Fore wings more than twice as long as wide, with the costa slightly arched ; apical margin slightly 

 sinuated, scarcely oblique : the costal fold in the male long and narrow, not closely appressed, 

 reaching nearly half the length of the wing : the apical half of the wing is divided into three 

 portions — the 1st an oblique ferruginous-brown fascia, widest towards the dorsal margin, and 

 touched with fuscous especially along its edges ; the 2nd bluish grey, externally margined 

 with fuscous ; the 3rd bright ferruginous, extending to the apex, interrupted by some white 

 geminated streaks from the costa ; each pair divided by a slender black line : along the upper 

 portion of the apical margin is a black line at the base of the cilia, which are touched with 

 brown and fuscous ; towards the base, on the dorsal half of the wing, are some irregular 



G 



