oe re a bees RUA GE Se Re, BI Ra cee Rh Se 
‘ : - a - be Os 
~ \ a Rae 4 = = 
a tas ‘ ~ 
340 BIRDS FROM YEZO, JAPAN—STEJNEGER. 
find none of the Ph. xanthodryas style in the Alaskan series. It is, 
furthermore, clear from the dates of the different birds, that season has 
nothing to do with the intensity of the yellow color. JI am therefore 
not prepared to give up Ph. xanthodryas entirely, but as intermediate 
specimens undeniably occur, I shall, at least provisionally, adopt the 
course already indicated by me on a former occasion (Res. Orn. Expl. 
Kamtsch., p. 306) calling the yellow bird Ph. borealis xanthodryas, in 
spite of the fact that itis difficult at present to assign a definite habitat 
to the two forms, as both seem to occur in the same countries.* It is 
possible, however, that Ph. xanthodryas is the breeding bird of Japan, 
and that Ph. borealis only occurs there on the migrations; this is a. 
question for the resident ornithologists there to investigate and solve. 
The Japanese specimens of the two forms, as I have provisionally 
separated them, measure as follows: 
Phyllopseustes borealis. 
| : 
Bs 
| °o 
e\.| | 
Leetor ; ; z z is 
Museum and No. ea a no ) Locality. Date. 8 : s A 
na} = s ‘e | 
=| 3) D a | 2 >) 
w SM fate aie eee Ped let: 
4 SlS/RIET EIS 
ra Fla|la lela] 
U.S. Nat. 96255..) Blakist., 2972 .| ad.| Tomakomai, Yezo .| Sept. 16, 1882 | 68 | 47 | 10 |11 19.5) 15 
Christiania, N ...| Petersen, 28 ..|¢ ad.| Urakami, Kiusire -| Feb. 15, 1886 | 64 | 46 | 10 |18. 5/20 15 
U.S. Nat. 120409.} Henson, w....| ad.| Hakodate, Yezo ...|......--..-..- 64 | 48 |} 10 }11 |18.5; 14 
U.S. Nat. 120410.| Henson, v..-.| ad.|..-... (1 BRS Ba seen ire > ase 66 | 48 | 10 ]10 {20 14 
U.S. Nat. 120411.| Henson, y ....|  ad.]...... OO sce scenes Kiet e come c ee | 72 | 51 | 10 }11. 5/20 14 
Phyllopseustes borealis xanthodryas. 
E 
= 
4 Oo 
Bl, P= 
Collector z Sage $ 
Museum and No. and No. bb Locality. Date. Pare FI 2 
c= eS eee 
a o a a | 2] 
3 on | ° 4 = = 
y Aisi ila81a (3s 
R EFlalai/el/ale 
U.S. Nat. 88624. .| Jouy, 537 ..... io’ ad.| Fuji, Hondo .-.-..--- July 20, 1882 | 71 (52/10) 15) 21) 15 
U.S. Nat. as Jouy, 682 ..... |g ad.| Chiusenji Lake, | Oct. 3,1882] 65 | 47 | 11 | 12} 20] 15 
Hondo. 
U.S. Nat. 96254../ Blakist., 1879.|¢ ad.| Hakodate, Yezo...; Oct. 3,1875] 73 | 51 | 11 | 11 | 21 ).... 
U.S. Nat. 120412.| Henson, z..... P71 Us| [eee COs eee lee ee eas 70 | 50 | 11 | 13} 21 15 
U.S. Nat. 120413.; Henson, aa...| ad.|...... GO: 26. See see et | eae eee ees 69 | 48 |....| 14 | 20| 16 
*Pleske (Ornith. Ross., II, ii, 1889, p. 155) has shown, however, that Ph. xantho- 
dryas has only been found in Kamtchatka, the Kuriles, Japan, and Amoy, China, while 
all the specimens from Siberia are typical Ph. borealis, and I have called attention 
to the fact that the Ph. ranthodryas style is not found in Alaska. But the fact re- 
mains that Ph. borealis also occurs in the countries whence comes the yellow form. 
