374 
U. S P. R. R EXP. AND SURVEYS— ZOOLOGY GENERAL REPORT. 
List of specimens. 
Sex 
Locality. 
When collected. 
Whence obtained. 
Orig'l 
No. 
Collected by — 
Length. 
Extent. 
Wing. 
Remarks. 
Union 
,1843 
S. F. Baird 
Lt. G. K. Warren 
J J Audubon 
Yellow-tone river 
Dr Ha den 

V il i\v tone river (above 
IsTilesT 
j an> }g55 
Sept. 10, 1856 
June 22.1856 
do 
8.12 
8.25 
8.75 
8.75 
8 75 
8.50 
8.37 
8 75 
g " 
8.25 
8. 
8.50 
15. 
15.25 
15.50 
13.75 
16.50 
14 50 
14.50 
15.37 
15.25 
15 25 
15.25 
14.50 
15.75 
15.75 
4.75 
4.50 
5. 
4.50 
5.25 
5. 
3 
8 
9 
8 
9 
g 
8 
9 
9 
8 
8 
8 
s 
$ 
9 
9 
do 
do 
do 
May — , 1856 
y 
do 
do 
Island 
Mny 11), 1856 
May 30,1856 
do 
5.50 
5.25 
5 25 
5 
4.75 
4 75 
4 50 
4 50 
5 00 
May 31,1856 
May 29,1856 
June 2,1856 
do 
do 
do 
y 
May 30,1856 
Aug. 1,1856 
Near mouth of Powder 
river, Nebraska. 
do 
do 
Lou Fork 
Aug 6 1857 
Au™. 16, 1857 
do 
Iris 
do 
do 
$ 
8 
9 
Q 
Fo ' Laramie Neb 
Pole creek Neb 
Au 2? lg5? 
July 29, 18'6 
Wm M Ma«raw 
Lieut Br an 
70 
173 
Dr. T. G .Coop- 
W S Wood 
Iris brown bill and 
'feet^rT-isli black 
eetgrayis ac 
do 
July 28.1856 
July 29,1856 
May 1,1 P55 
Sept. 1, 1855 
177 
57 
50 
do 
do 
do 
8 
850 
s roriv r Texas 
San p.-djo river, exas.... 
14 50 
o 
Eyes brown 
9 
8 
9 
8.75 
9 50 
9. CO 
15.00 
15.50 
do do 
May 2,1855 
162 
557 
675 
9. 
16. 
5.37 
9 
8 
, 1853 
John Xantus de Vesey. 
TYRANNUS VOCIFERANS, Swain son. 
Cassin's Flycatcher. 
Tyrannus vociferans, Swainson, Mon. Tyrant Shrikes in Quarterly Journal Sc. XX, Jan. 1826, 273 — Ib. Philos. 
Mag. I, 1827, 368. 
Tyrannus cassinii, Lawrence, Ann. N. Y. Lyceum, N. H. V, 1852, 39 ; pi. iii, fig. 2, (Texas.) 
Sp. Ch. — Bill from the forehead about as long as the head. Tail even or slightly rounded. Outer five primaries attenuated ; 
the first four abruptly and deeply emarginated ; third quill longest, second and fourth a little less, first shorter than the sixth, 
and half an inch less than the longest. Head and neck above and on the sides rather dark bluish ash ; the throat and breast 
similar, and only a little paler. Rest of upper parts olive green tinged with gray, mixed with brown on the rump ; the upper 
tail coverts and surface of the tail nearly black ; the outer web of the external feather and the tips of all pale brown. The chin 
is white, in strong contrast to the dark ash of the throat ; the rest of the under parts bright sulphur yellow, (the sides olivaceous ;) 
palest on the under tail coverts and inside of wing. A concealed vermilion patch in the crown, bordered by straw yellow. 
Wing feathers Drown, tinged with olive, becoming paler towards the edge. Length, 8.80 inches ; wing, 5.25 ; tail, 4.25. 
Hab. — Valley of Gila, eastward to Pecos river, Texas, and into Mexico, on table lands. 
