NORWEGIAN LEPIDOPTERA. 11 



periods of emergence. I take it, therefore, that the classifica- 

 tion of these western palaearctic Hesperiids should now be as 

 follows : — 



H. oakling, Ebr. 



H. fritillum, Hb. (= cirsii, Ebr.) 



(a) ab. herrichii, Obthr. 



(b) var. iberica, Gr. Gr. 



(c) var. sicilice, Obthr. 

 preceded by H. alveus, Hb. 



(a) var. foulquieri, Obthr. 



(b) var. ryffelensis, Obthr. 



(c) var. numida, Obthr. 



(d) var. ? ballota, Bsdv. 



H. armoricanus, Obthr. (= fritillum, Bsdv., and jace^e, 



Guen. (in litt.)). 

 H. bellieri, Obthr. 

 For it seems that bellieri, the butterfly described as a variety of 

 alveus, and certainly very distinct superficially from it, will also 

 turn out to be a separate species. 



(To be continued.) 



THE LEPIDOPTERA OF THE NORWEGIAN PROVINCES 

 OF ODALEN AND FINMARK. 



By W. G. Sheldon, F.E.S. 



(Concluded from vol. xlv. p. 340.) 



Brenthis polaris. — Schoyen seems to have found this species in 

 abundance in various localities in the Porsanger Fjord in 1878 and 

 1879, but Herr Bye, who many years since collected a few Lepidoptera, 

 informed me that for years it had been very scarce, and was not at 

 all sanguine as to its present occurrence. I was therefore, perhaps, 

 fortunate to obtain sixteen fine examples near to Kolvik. These were 

 obtained in one small locality of perhaps fifty yards by twenty, 

 although I searched closely miles of similar ground on both sides of 

 the Fjord. 



The localities frequented by B. polaris in this district are rough 

 dolomite screes, on which the only plants growing are Dryas octo- 

 petala and occasional tufts of a very dry grass. Schoyen suggests 

 that the larva feeds upon the former plant, and there does not seem 

 to be any other reasonable hypothesis. The imago flies swiftly, 

 irregularly in the case of the male, but steadily in that of the female ; 

 only in the brightest sunshine, and after the sun has been shining for 

 some time. x\t intervals they will settle on the bare scree, always with 

 wings outstretched, but never on anything else, so far as my observa- 

 tions went. I saw one female, which I could not very well follow 

 rapidly, fly over a low belt of birch- scrub growing on the edge of 

 the locality in which the species occurred, and settle on the scree 



