ON THE ORNITHOLOGY OP LAPLAND. 249 



sakfalle, only used in another district. He then 

 gives us descriptions and measurements taken by 

 himself from fourteen different specimens, varying 

 in length from 21 in. to 25 in., and presenting every 

 shade of plumage, from the dark young to the old 

 white mature bird. It would have been interest- 

 ing if I could have inserted a full translation of 

 his descriptions, but I cannot find space. Nils- 

 son's experience in Swedish ornithology is very 

 great, and has extended over many years, and his 

 opinion, with me at least, always carries weight. 

 I may remark that he divides his specimens into 

 two series the first with oblong, the latter with 

 transverse spots. 



He winds up his remarks with the following 

 pertinent note, which I translate freely and fully : 

 " To this latter series probably belongs Schle- 

 gel's Falco candicans Islandicus, as he has 

 described it in his c Revue Critique,' p. 4. It is 

 also undeniable that Linne's Falco rusticolus and 

 gyr-falco belong to this group ; but by referring 

 to the above measurements it does not appear 

 that the gyr-falco is so much smaller than Candi- 

 cans Islandicus. Herr Schlegel, c Revue,' p. 57, 

 expresses his surprise that the true Norwegian 

 gyr-falco ( c den ratta Norska gyr-falco'), which he 

 (Schlegel), nevertheless, supposes to be identical 

 with Linne's Falco lanarius, Faun. Suec., should 



