336 BIRDS FROM YEZO, JAPAN—STEJNEGER. 
Mr. Henson’s specimens are from Hakodate, Yezo, and the dates on 
which they were collected run as follows in the order in which the speci- 
mens have been mentioned above, viz: May 20, June 17, May 17, 25, 
6, 27, 18, 18, 17, 30. | For comparison it is interesting to note, that Pe- 
tersen’s bird, which has nearly finished the change, was collected in Kin- 
siu April 29. The change, therefore, seems to take place during May 
and first half of June. 
In the above specimens in which the tertiaries have become black, 
this color contrasts strongly with the faded brownish gray of the other 
remiges, and there is no indication of the latter becoming black by a 
gradual change. In the series of 8 specimens which I have designated 
as males in ‘ full plumage” there are several in which all the remiges 
are intermediate blackish brown, paler towards the tip. It would there- 
fore appear as if all the primaries and secondaries change to black sim- 
ultaneously and that this change takes place very suddenly. The pro- 
cess seems to be the same in the tail-feathers, though I may mention, 
that Mr. Jouy has a changing male from Korea in which all the ree- 
trices are black or nearly so, with the exception of the middle pair, which 
is still brownish. 
In regard to the young males collected by Mr. Henson I have only to 
remark that No. 1161 has still a few feathers on the nape belonging to 
the first plumage, with a buffy spot and dusky margin to the tips. 
Measurements. 
| | | | E 
| | | leg | 3 | 
| sh esa 
| Sex | E = 
Val % fe ex n et Bo oe 
Museum and Mio, Colteetor and) and Locality. | Date. z = BAe 
ieee age | gent gh; 
<li ae] ¢ in) a a ona ae 
| SO | % ° 5 om le 
ale = 2 oe | 3 
Joga! [ited [ibe =| Octo ieeenathaaes 
- a |e 
| | AH} a a |e 
U.S. Nat. 120376..| Henson, 687.| ¢ ad...| Hakodate, Yezo.| May 23,1885 | 78 | 50 | 10 | 17 17 
We SaNate120377 5.) Elenson, 686)| .@adeos|so done snes see May 17,1885| 76| 49/10 |16 |16 | 
U.S. Nat. 120378..| Henson, 681.] ¢ ad._.|..--do.----.-.-- | May 18,1885 | 79 | 52 | 10 | 16.5] 16.5]... 
WASeNiats120379ee! Henson, 682 il Ghadessiss0-G0 saeeae mee ses MOWseceee ROM) oferta tages = i 
U.S. Nat. 120380..} Henson, 676.| ¢ ad...|..-.do.....-.--- May 20,1885) 74/50/10 | 16.5] 16.5)._ 
U.S. Nat. 120381..| Henson, 694.] ¢ ad...|.--. dO). 5225 5 | May 28,1885| 76/50/10 | 16 |16 |... 
U.S. Nat. 120382. .| Henson, 679.| ¢ ad...].--. dot teu | June 9,1886/ 77| 49/10 | 17 |17 |.. 
U.S. Nat. 120383..| Henson, 678.| g ad...|....do-......... June 6,1885| 77| 50/10 117 |17 |.. 
U.S. Nat. 120384..| Henson, 690.} trans.].--.do.......--- June 17, 1886 | 76 | 49 | 10 | 16.5) 16 ; 
U.S. Nat. 120385..| Henson, 680.! ¢trans.|....do.-.....--. June 8,1886|___.| 52] 9.51/16 |16 |. 
U.S. Nat. 120386..! Henson, 685.! ¢trans.|....do.-.-..--.. | May 20,1885! 74149] 10 | 16.5117 |..- 
U.S. Nat. 120287..| Henson, 688.| ¢trans.|....do----- ..--.[ May 17,1886) 76153110 | 47 | 17° |.) 
U.S. Nat. 120888..| Henson, 677.| jtrans.].--.do..-... -..- | May 6,1884] 79 | 52 | 10 17.5) 17 i 
U.S. Nat. 120389..| Henson, 691.| ¢trans.|.-..do.-.... ..-- May 27,1885) 75 | 49 | 10 | 17.5) 17 
U.S. Nat. 120390..| Henson, 683.| ¢trans.|.-..do.-......-- May 18,1885].._./ 49 | 9.5, 16 | 16 
U.S. Nat. 120391..| Henson, 684.! ¢trans.|.---do-..-..-..-. eee eee 74/49] 10 | 16 | 16 
U. S. Nat. 120392..| Henson, 692.| jtrans.|....do.......... May 17,1885) 75.) 50] 9 |17 | 16 |... 
U.S. Nat. 120393. .! Henson, 689.| ¢trans.|.-..do..-.-..--- May 23,1885] 77 | 51 | 10 | 16.5) 16.5'.__. 
U.S. Nat. 120394..| Henson, 693.| ¢trans.|....do.......... May 30,1885] 72 | 49| 9.5116 | 15 |__.. 
Christiana N ....) Petersen, 54.| ¢trans.| Shimbon, Kiu-| Apr. 29,1886) 75 | 51 | 9.5).....|._..- c 
siu. | | : 
U.S. Nat. 26140..| Blak. 2914...| ¢trans.| Sapporo, Yezo..| June.-....-. 75.| 5 5 
U.S. Nat. 88621..| Jouy, 338....] gad... Fu. Hondo . ..| June 29, 1882 | 77 a “4 ee - 5 
U.S. Nat. 88620..| Jouy, 449....| fi ad...]....do...... 2... [elie 'y 26) ASS21) Wi 1!) SON Oo] emer 
U.S. Nat. 91380..) Jouy,719....| ¢jun.. Tate Yama,| Oct. 26,1882| 77/50|10 |17 |17 |... 
| | ondo. | 
U.S. Nat. 120395..; Henson, 1161) ¢ jun..| Hakodate, Yezo.| Sept. 11, 1884 | 76 | 50 
U.S. Nat. 120396. -| Henson, 1177| ¢jun..|....do.......... | Sept. 15,1884 | 72 | 47 1 fig (ae oe 
U.S. Nat, 120397..| Henson, 1186) ¢ jun..!.... dowcneeowees i Sept. 17, 1884 76 | 48 | 10 16 16 eee 
