R. COLLETT. [No. 11. 



mentary character of the generative organs, was given by the 

 present author in the 'Ibis', Ser. VII, Vol. IV, p. 317, Pl. VII 

 (London, 1898). The bird is preserved in the Christiania Mu- 

 seum 1 . 



Total length 253 mm 



Length of wing from carpus . . 131 



mm 



Length of tail 89 mm 



The average total length of T. pilaris is from 270 to 275 mm , 

 occasionally 281 mm , that of T. iliacus being about 220-225 mm , 

 sometimes a little over 230 mm . In size therefore, the present 

 specimen comes about half-way between the two parents. 



As regards the colour of the upper surface, the specimen 

 resembled T. pilaris more than T. iliacus, though differing 

 from both. The whitish yellow eye-stripe was more marked 

 than in T. pilaris, and fainter than in T. iliacus. The rump 

 was of a somevvhat lighter grey than the back, which had not 

 the deep chestnut colour of that in T. pilaris. The tail-feathers, 

 on the other hand, were of a blackish colour, almost as in the 

 latter species. 



In the colour of the lower parts it more closely resembles 

 T. iliacus than the other species. The throat, chin, and under 

 wing-coverts are nearly as in the former species; but the spots 

 on the breast are almost triangular, and several of the side 

 feathers show indications of the dark, crescent-shaped transverse 

 bars that are characteristic of T. pilaris. 



The stomach contained several berries of Sorbus aucuparia 

 and a few seeds of Juniperus. 



A specimen of the same hybrid form was tåken in the neighbonrhood 

 of Stockholm on the 12th Feb. 1859, and was shortly afterwards (1860) 

 described by Meves as belonging to "T. illuminus, Lobenst." (Ofv. Kgl. 

 Vetensk. Akad. FSrh. Årg. 17, No. 4, p. 202. Stockholm 1861). Through 

 the kindness of Professor Smitt, I have had an opportunity of making 

 a direct comparison between that specimen (which is preserved in the 

 Riks Museum in Stockholm) and our own, and have found them in 

 every respect identical. 



