~ a P 
ON SOME NEW FORMS OF AMERICAN BIRDS. 603 
Included in the paper are some hitherto unpublished descrip- 
tions of races of birds by Prof. Baird. 
op MEL 
1. Catherpes Mexicanus, var. conspersus Ripaway. Cañon Wren; 
White-throated. Rock Wren.* 
SP. CHAR. (No. 53,425 g, near Fort Churchill, Nevada, Dec. 7, 1867; R. RIDGWAY.) 
EP ae = ERP EF ES 
Ct 8 e 
w of these dots on the rump. Wings with obsolete, 
ragged, narrow, isolated sae of dusky, ghee se most sharply defined on the tertials. 
Tail clear rufous, crossed with about nine very narrow, sae aa’ span wir zigzag 
bars of black,—these about ‘02 wide on the middle, and ° n the outer feather. 
eneath, greys Laan a sks-white, ~~ ison i into s cna on 
the breast, this n darkening into, deep ferruginous, the color of all the posterior 
lower parts; the wholes of vai erin fae surfac Swick very opps transverse spots 
of white, eich preceded by a narrower napia one. Length, 5:75; extent of wings, 7:50 
(fresh) ; wine: 2:48; tail, 2- a prai ,'83; tarsus, ‘56. Bill deep eesi paler and with 
cono tinge at base of lower make. iris i tarsi and toes black (fresh 
colors). 
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tral region of North America, from boundary of United States northward 
to the ara of 40°. Extends up Valley of on Western Nevada and Utah, 
resident; RIDGWAY. Colorado; AIKEN; ALL 
The above characters apply to all specimens of Catherpes from 
north of the Mexican boundary, as substantiated by a sufficient 
Series in the collection. It is a remarkable fact that this northern 
race should be so much smaller than the Mexican one, especially 
in view of the fact that it is a resident bird in even the most 
northern parts of its ascertained habitat. 
| This race may be immediately distinguished from the Mexican 
form as follows :— 
wi Gide Vie iia 
Culmen almost straight, the tip decurved, gonys straight. stg rA 
brown; wings and back sparsely sprinkled with minute white ks; 
such markings on head or neck. Bars on tail WA, pier: “12 in a widen on ou aa 
feathers. Wing, 2-84; tail, 2-40; culmen, ‘96; “15; dle toe, *68; 
D "47; outer, 52; inner, * saat 791, Mazatlan, neice. Hab. Mex- 
ii 3 1 + 4 U S RE khat ove, 
cinname re reddish head and neck above with 
Sumerous sada ae of ” white; very few of bas 6 a c wings. Tai 
12; culmen, -83; tarsus, ‘56; middle toe, -52; posterior, ‘35; outer, *44; inner, 
3 ens a Fort Churchill, Nevada.) Hab. Middle Province ai Ys ited 
CONSPERSUS, 
pR roglodytes Mexicanus Heermann, J. A. N. Sc., 2d ser., ii, 1853, 63.—Ib. P. 
Aena » X, 1859, 4l. Cassin, post. Birds Gal., T "1854, 173, pl. xxx. Catherpes 
exicanu s Baird 1858, 356 (in part); Rev., 2a nii l pamp arte ts 
i, 1870, er Par rpi es + ia ap gis var. s Ridgway, 
Rep. U. S. Geol. Expl., 40th Par. pe press). 
