BIRDS—TURDIDAE—SIALIA ARCTICA. 225 
separating the feathers. The quills are much edged with paler. The young birds have this 
brown streaked with white, except on the crown ; indeed, the under parts may be described 
sometimes as whitish, with narrow brownish edgings to the feathers on the under parts 
anteriorly. 
The bill of this species is much stouter than in mexicana, as well as longer than in sialis. 
The wings also are longer in proportion, reaching nearly to the end of the tail, which is more 
deeply forked than in either of the others. The male birds of the three species are readily dis- 
tinguishable ; the females are all much alike. The greener blue, the absence of rufous brown on 
either back or belly, and the longer wings, will serve to separate the latter. 
In the zoology of Stansbury’s report I characterize a species under the name of Sialia macrop- 
tera on the ground of the unusually long wings, the weak claws, and the different shade of 
blue. This specimen (3706, Salt Lake, March 21, 1851) still remains quite unique in these 
respects. JI am, however, now inclined to consider it as only a larger race, because more 
northern, of the S. arctica, strengthening the general proposition of the greater size of resident 
winter or summer specimens in northern than southern localities. The weak claws may have 
been an individual peculiarity. All the specimens before me, nearly thirty in number, agree, 
with scarcely an exception, in the smaller size and shorter wings. 
List of specimens. 
Catal. |Sex and Locality. When col- | Whence obtained. | Orig’! Collected by— Length,| Stretch | Wing. Remarks. 
No. age. lected. No. of wings.| 
| ha ye ee ee eS aa 
1875 | | Fort Union, Neb.......| July 1, 1843 | 8. F. Baird.........[..00-/J. Je AUGUBON....0.[ese cece] sone ceee aera erent se 
gse5| O Black Hills Sept. 19, — | Lt. G. K. Warren ..|......| Dr. Hayden........ 
8488 Q osce0.dO.. 00 «| Sept. 13, —- 
BEEZ |. ccecces| ove 0 dO.. 06 .| Sept. 21, —— 
é Camp 4...... .| Sept. 7,— 
8890 Q Black Hills ........-...| Sept. 18, —— 
8884 Gi iseoess dO.. ceevceee cocadd| |saosod GO fe cae 
BSEON Sac ceaeul'sccees do Sept. 22, — 
8886 (aio ol AOS do -| Sept. 20, — 
BEB |eoee-eeel ca eee dos. .| Sept. 14, — 
G40] ME Giae |sanesadonicaee reste esees| Aliza 1351856 
5636 | G © | Medicine Bowcreek,Neb| Aug. 9,1856). 
6990.).... os. Cheyenne pass.....¢4 «| JUIY 20,1857 |. .6eedOveeeveeveres| 293 jeeeeeedO.ceveeceeeee 
5639 QO Main Fork, Laramie R..) Aug. 6, 1856 | seeecseecees| 216 | reeeeedOrseveccceees | 
5638} Medicine Bow creek....| Aug. 951856 |....05 5 : . ee 
6691 Q ifodititte wowhioutalne| July 27,1857 ]......d0... oe seen eee eens 
7080 Q Cooper’s CICEK ceee cere July 26, 1857. 
3706 3 Salt Lake City. ...cccee Mar. 21,1851 | Capt. Stansbury.... 
7606 | .......| Cochetope pass........|seesee--ee sees! Lieut. Beckwith.... 
8494 fof Fort Mass. N. M....... Mar. 30,1856 | Dr. Peters...... sees 
G09) |e eeete cial Near lat. 32° W. Texas.|.... «.| Capt. Pope ....0... 
7612 lec’ .+..| Mimbres to Rio Grande.|.... -| Dr. Henry .. 
7604 |" Fort Thorn ,..... ReceaedO ce 
7605 QD Joeseee GO. cove cone cccers eee 
7607 |........| 75 miles west of Albu- | Nov. —,1853| Lieut. Whipple ....) 15 | Kenn. and Mill.... 
querque. 
PGCE | coeseces| ESpidy MCX. colecccccce Mar. —,1853| Maj. Emory... «es. «| Dr. Kennerly ..-.. 
aecéce -| San Diego, Cal Lieut. Trowbridge. . A. Cassidy..... eeee 
