354 Mr. H. J. Elwes on the 



it is only a variety of that extremely variable species, and 

 the difference between it and typical noma are not so great 

 as between large Swedish specimens and the very small, 

 pale, and sometimes almost unspotted specimens which 

 are found on the Porsanger Fiord in Arctic Norway, and 

 are known as ah.fuUa, though I think they are distinct 

 from the true fulla of Eversmann, of which I have seen 

 the types at St. Petersburg, and which occur in the 

 Alatan and Tarbaoatai Mountains. 



139. CE. duhia, n. sp. ? (PI. XIII, fig. 6 ^ ; Pi. XIV, fig. 

 3?). 



Though I have considerable doubt as to whether this 

 is a good species, or only a form of the last, yet I have 

 no difficulty in separating it from any specimens of (Eneis 

 noma in my collection by the following characters, which 

 are found in 9 ^ and 2 $ in my collection. 



First, there is a total absence of the androconia which 

 forms a conspicuous sex-mark on the fore-wing in all 

 specimens of noma from Europe or Asia. 



Secondly, a difference in the form of the clasp, which 

 does not agree either with that of the jiutta, noma, nanna 

 or horc,' \^'\\j\i all of which I have tried hard to identify it. 



Thirdly, the much darker colour of the female. 



Fourthly, the fact that it seems to appear much later 

 in the season than noma, var. altaica. 



The only one I took myself was a fresh $ on July 24th (PI. 

 XIV, fig. 3) in swampy larch forest north of the Kurai Pass ; 

 this was quite fresh five weeks after noma first appeared. 

 I received, however, from Messrs. Berczowsky and Jacob- 

 son ten males and one female taken at Ongodai in July, 

 which are evidently the same species, and no noma was 

 amongst them. I cannot see any well-marked difference 

 from noma in the colour or pattern of the males, though 

 the transverse band of the fore-wing below is very faint 

 or obsolete in duhia, and well-marked in noma, var. 

 altaica; and the difference in colour of the fulvous outer 

 band on both win^s above is strikino-. I have also 

 compared specimens with Dr. Staudinger's collection, and 

 can find nothing like duhia, but I believe that in the 

 collection made by Jacobson in the Yenesei Valley in 1897, 

 now in St. Petersburg, there is one of this species, as there 

 is also one of my noma, var. altaica. 



