16 R. COLLETT. [No. 11. 



The specimen was thus of about the same size as its pre- 

 sumptive mother, T urogallus, fem., as is also the case with 

 the other hybrid, the Rype-Orre, whose male is also of about 

 the same size as its mother, L. tetrix, fem. 



The generative organs in this specimen were well developed. 

 According to Dr. Grieg, the testes were both of about the same 

 size, being 9 ram long and 3 mm broad, and of a greyish white 

 colour; and there is little doubt that this bird would a few 

 months later have been present on some pairing-ground (perhaps 

 of the capercaillie). 



Food. The stomach and crop were full of catkins of the 

 birch (Betula odorata, alpigena). 



4. Lagopus lagopus, (Lin.) X Lyrurus tetrix, (Lin.) 

 (mas). (fem.) 



Occurrence. One or more specimens of the Rype-Orre 

 are found almost annually in the subalpine zone, from Thele- 

 marken up to Lyngen (on the boundary between Tromsø and 

 Finmark). In Lofoten and Vesteraalen they have been seen far 

 out on the larger islands. Females have been far scarcer than 

 males. 



Diagn. Tail in the male a little forked, in the female almost 

 even. Toes half feathered (last toe-joint naked). Male of the sise of its 

 mother, L. tetrix, fem., the female somewhat smatter, about the sise of 

 the father, L. lagopus, rna*. 



Male (winter phimage). Colours principally brownish black and 

 white, with very little reddish brown. 



Upper surface brownish black, the feathers with broad white or 

 grey mottled edges; under surface mainly white, with an admixture of 

 black, especially on the neck, breast and sides. Sometimes a more or 

 less distinct black patch on the breast [with purple lustre). 



A black or black- mottled stripe from the base of the bill across the 

 eye-region, and a white stripe through the eye. 



Cubitals with broad white tips, but without any white at the root ; 

 tail-feathers black with narrow white margin; upper tail-coverts black 

 with broad wliife tips, under tail-coverts white. 



