54 



and the sub-marginal band of white spots is more distinctly ang- 

 ular about the middle. It is also edged interiorly with a deep 

 brown shade. Outside of this band, a purplish tint encloses the 

 lunules, which are slate color, edged above with a few orange 

 sc.des. 



Exp. wings. 0.85 inch. 



I ^ I ?. Mendocino Co., Cal. 



Types. Coll. Hy. Edwards. 



I have named this exquisite little species after my friend, 

 John Muir, so well known for his researches into the geology of 

 the Sierra Nevada, who has frequently added rare and interest- 

 ing species to my collection. 



Thecla IRUS. n. van Mossii. Hy. Edw. 



Upper surface entirely bright chestnut brown, a little clouded 

 with dusky at the apices, and on the extreme margins. Fringes 

 wholly white, and not alternately brown and white, as in T. Irns, 

 and the varieties Henrici and Arsacc. Tails wanting. Under 

 side, primaries reddish-brown, darkest at the base, and brightest 

 at the margin. From costa entirely across the wing is a sinuous 

 white band, bent outwardly at the middle, and edged above by a 

 deep chestnut brown shade. The secondaries have the base deep 

 blackish-brown of uniform color, above the usual sinuous band, 

 which is narrow, whitish, with a very large and sharp angle at the 

 median nerve. The marginal spots are large, distinct, bright 

 chestnut brown, 6 in number, each surmounted by a small black 

 lunule. 



Exp. wings. 0.80 inch. 



I $ . Esquimau, Vancouver Island. Dr. Moss. 



Type. Coll. Hy. Edwards. 



I have for the present regarded this as a variety of T. Irns, 

 but it is quite possible that it is a distinct species; the uniform 

 deep brown base of secondaries giving it a most peculiar appear- 

 ance. It is at any rate farther removed from the typical T. Irics, 

 than either Arsace or Henrici. 



Thecla tacita, n. sp. 



Allied to T. adcnostoinatis, Hy. Edw. Upper surface wholly 

 pale plumbeous, a little darker at the margin, discal patch and 

 the nervules also deeper in shade, and very distinctly marked. 

 Tails of secondaries very small, linear, edged with white. Near 

 the anal angle is a small and faint ochraceous shade; fringes of both 

 wings sordid white ; lower side paler than the upper, with very 

 faint submarginal line of blackish lunules, and a median curved 

 line of ovate spots equally faint ; there is a black spot on the 

 fringe at the extreme anal angle, followed by a patch of bluish 

 scales, and a very pale yellowish triangular spot, narrowly edged 

 with black ; the whole of the markings are indistinct. 



Head with white line at base of the eyes, and two small 



