248 A SPRING AND SUMMER IN LAPLAND. 



describing the F. lanarius, does not say anything 

 regarding the colour of the head, Nils son, in 

 describing the " slag falk" (F. lanarius, Lin.), 

 distinctly says, "head white, tinged with rusty 

 yellow;" and except that he gives the length of 

 the old female twenty inches, his general descrip- 

 tion agrees with Dr. Bree's description of the 

 lanner falcon (Falco lanarius, Schleg.) of his 

 admirable work, p. 37. Linngeus' description of 

 the lanner was from a younger bird, killed in 

 Sweden. In Nilsson' s description of the Falco 

 jer-falco (Lin. and Nils.), he does not use Lin- 

 nasus' synonym of Falco lanarius, but he gives to 

 it the synonym of Falco riisticolus, Lin. Faun, 

 p. 19 (older female) ; and also Falco jer-falco, 

 Lin. Faun. p. 22 (young bird). 



Neither Nilsson nor Sundeval will allow that 

 there is more than one species of jer-falcon in 

 Sweden, in describing which Nilsson uses all these 

 synonyms : " Falco gyr-falco Islandicus, candi- 

 cans ; Groenlandicus rusticolus, fuscus, umbrinus ;" 

 and he gives it the Swedish names of jakt-falk, 

 hort-falk, bla-falk (the name by which this dark 

 Falco gyr-falco Norwegicus is known on the Nor- 

 wegian fells) ; and he also gives to the same bird 

 the Lapland name of riefsakfalle thus clearly 

 identifying it with our Lap "rip spenning," which 

 word has precisely the same meaning as the rief- 



