26 R.COLLETT. HYBRIDS AMONG NORW. BIRDS. [No. li. 1905.] 



those of the father than of the mother. If this fact can be 

 applied to the case of the „Hjerpe-Orre" (p. 11) and of the „Rype- 

 Tiur" (p. 14), the father in the former is T. bonasia, in the 

 latter L. lagopus; and we may therefore on the same grounds 

 suppose that in the case of the Rype-Bastard from the Tromsø 

 valley, the father is L. lagopus. 



Printed 23 February. 1906. 



