56 TOETEICID^. 



oblique^ scarcely concave — whitisli fawn-colour^ longitudinally streaked witli darker shades : 

 from the base are tAvo brownish shades^ one above and one below the middle^ the latter the 

 most conspicuous^ blending with some streaks of the same colour^ which are continued along 

 the cell, terminating in a brownish-fuscous spot at its lower extremity : from the apical 

 margin pointing inwards are six narrow brown wedge-shaped dashes following the veins to 

 the end of the cell, interrupted by two pale elongated spots, one before the apex, the other 

 below the middle : the anal angle shaded with brown : cilia irrorated with brownish fuscous, 

 with a slender whitish line along their base. Hind wings brownish, with paler cilia. Type ^ . 

 Expanse ot wings 24 millims. 



From the Eastern States of North America. 



Semasia? elongana. (Plate LXXIII. fig. 2.) 



Palpi stone-grey, very long, projecting more than three times the length of the head 

 beyond it ; the second joint thickened in the middle, clothed with long hair -like scales, 

 enveloping and concealing the short slender apical joint : antennse stone-grey, pubescent in 

 the male. Fore wings— about three times as long as wide, with the costa straight, slightly 

 depressed towards the apex ; apex produced ; apical margin very oblique, not indented — 

 whitish stone-grey, mixed with dull ochreous and fuscous scales : on the dorsal half of the 

 basal portion of the wing is an inconspicuous oblique ochreous shade mixed with fuscous ; 

 from the middle of the costa is a very faint indication of an abbreviated oblique fascia ; 

 towards the apex are some inconspicuous whitish costal streaks, blending towards the sub- 

 lustrous white outer margin of the ocellated spot, which contains two black streaks : the 

 apical margin is tinged with ochreous ; the cilia irregularly tinged with purplish fuscous, a 

 slender pale line along their base. Hind wings ample, pale brownish grey : cilia as on the 

 fore wings; vein 4 absent.- 2 J*. Expanse of wings 25 milHms. 



Northern Oregon, middle of April 1872. 



This is one of several species in which vein 4 of the hind wings appears to be obsolete. 

 They agree in neuration with pupillana, Linn., and wimmerana, Tr., placed in the genus 

 Semasia by Heinemann, but scarcely with the distinguishing characters of the neuration of 

 the genus as stated by that author in his synopsis (Schmett. p. 100), viz. " Ast 3. und 4. 

 der Hinterfliigel auf gemeinschaftlichem Stiele;'^ and again, in the same volume (Tabelle 

 der Gattungen, p. 2), " Der Mittelast der Plinterfliigel gegen seinen Ursprung deutlich 

 gebogen und convergirt daselbst mit Ast 4." In the length of the palpi and in the form of 

 the fore wings it is also somewhat peculiar. I have placed it with some hesitation in this 

 genus, at least provisionally. 



Semasia artemisiana. (Plate LXXIII. fig. 3.) 

 Head white, tafted in front, with a slight ochreous tinge above, the palpi projecting more 



