18 Proceedings of the Biological Society of Washington. 



cast to this region; upper tail-coverts mouse gray with irregular bars and 

 fleckings of blackish and with a slight wash of snuff brown ; a line below 

 eye and the ear-coverts mars brown, the former with some blackish spot- 

 ting; sides of neck russet with irregular black bars and an apical grayish- 

 white spot; the longer feathers over the incipient ruff blackish with some 

 chestnut-brown on the inner web and with most of the outer web white; 

 chin and throat black, bordered by white; feathers of the lower parts 

 gray at the base, then auburn, then black, with a broad sub-terminal bar 

 of white and with a more or less narrow edging of black, the latter lacking 

 on the lower breast and belly ; the chest just below the white edging to 

 the throat strongly washed with a narrow band of hazel ; flank feathers 

 hazel with a sub-terminal black bar and a rather broad white tip; under 

 tail-coverts vandyke brown vermiculated with black and with a narrow 

 irregular subterminal black bar, broadly tipped with white; lesser wing- 

 coverts hair brown barred with black and with a subterminal bar of 

 pinkish-buff; alula and primary coverts hair brown irregularly margined 

 on the outer web with pinkish-buff; middle and greater wing-coverts 

 hair brown with black stippling and with more or less extensive guttate 

 spots of light buff; primaries and secondaries chaetura drab, irregularly 

 edged on the outer web with pinkish buff; tertials tawny towards the 

 end, stippled with black and edged with ochraceous-buff, the outer web 

 with a rather large spot and bar of black ; scapulars russet with black 

 stipplings and some rather large black spots and bars, the anterior 

 feathers with huffy shaft streaks, the posterior with rather large white or 

 buffy-white terminal spots; middle tail-feathers Front's brown with 

 irregular bars of wood brown and black, the whole stippled with black; 

 outer tail-feathers neutral gray stippled with black and with a broad sub- 

 terminal band of black ; tarsi light grayish olive with a buffy wash and 

 some obscure dusky markings. Wing, 162; tail, 110.5; culmen, 18. 



Remarks. — I have given a rather detailed description of this form as it 

 is so very different from anything before me. From Tetrastes bonasia 

 septentrionalis it is so very distinct that it hardly needs comparison ; that 

 form is clear neutral gray above, lighter on the rump, with the black 

 barring rather narrow on the interscapular region and with only the 

 scapulars showing brown (hazel), while in the present form the back is 

 hair brown with deep hazel bars and the black bars a little broader but 

 not so numerous. The wings of T. b. septentrionalis are also very different 

 from T. b. amurensis, the former contain more white and the edgings to 

 the feathers are broader. 



Of Tetrastes bonasia amurensif I have three males before me, two from 

 the type locality and one from the Amur (near Nikolaievsk); they are 

 similar except the hazel wash across the chest is much more pronounced 

 in the type, in fact in the other two specimens it is almost entirely lacking. 



Wing. Tail. Culmen. 



Three males from Manchuria average : 164.5 110.7 16.7 

 Six males of T. b. septentrionalis: 159 115.2 15.8 



For measurements of European and Japanese specimens, see these 

 Proceedings, XXVIII, 1915, p. 162. 



