BUBO 491 



pure white, the blackish markings rather fewer, and the facial disk white, 

 with a faint ochreous grey tinge ; ear -tufts black on the outer, and white 

 on the inner web ; feathers on the legs and feet w ? hite. Culmen 2'35, 

 wing 18'5, tail ll'O, tarsus 3'6 inch. 



Hob. This bird, which is a north-eastern form of B. ignavus, 



nhabits Siberia, east to the Pacific coast, and in habits and 



nidification does not differ from that species. The eggs, which 



are usually deposited late in March, are white, and measure 



about 2-35 by 1-92. 



699. JAPANESE EAGLE-OWL. 

 BUBO BLAKISTONI. 



Bubo blakistoni, Seebohm, P.Z.S. 1883, p. 466; id. Ibis, 1884, p. 42, 

 pi. vi. ; (Tacz.) F. 0. Sib. 0. p. 147. 



Shima-fukuro, Jap. 



ad. (Japan). General colour of the upper parts brown, marbled with 

 buff, which takes the form of transverse bars on the wings and tail ; no 

 black blotches as in B. ignavus^ but all the small feathers with dark brown 

 shaft-streaks, under parts similar, but the shaft-streaks narrower. Chin 

 and upper throat white, with very narrow shaft-streaks. Ear-tufts well 

 developed. Tarsus feathered, but toes entirely bare. Culmen 2'8, wing 21*0, 

 tail 11 '5, tarsus 3'8 inch. 



Hob. Japan, the Sidemi river in S.E. Siberia, and Lake 

 Khanka. 



Is readily distinguishable from B. ignavus in having the 

 tarsus only feathered and the toes bare, and appears to be the 

 only species of this genus found in Japan. Respecting its 

 habits and nidification nothing appears to be on record. 



700. SUBSP. BUBO DOKRIESI. 



Bubo dorriesi, Seebohm, Bull. B. 0. Club, v. p. iv. (1895). 



$ ad. (Amur-Bay). Differs from B. blakistoni, merely in having the 

 upper parts paler and whiter, and in having a white nuchal patch ; 

 tail creamy white blotched with blackish towards the end, the middle 

 feathers indistinctly vermiculated with pale brown. Wing 17*5, tail 10'5, 

 tarsus 2 '9 inch. 



Hob. Eastern Siberia. 



Nothing is known of the habits and nidification of this bird, 

 though five specimens have been obtained. The specimen 

 described is a very fine female in the Rothschild Museum at 

 Tring. 



