IIP'' 



^ 



126 



REVIEW OP AMERICAN BlllDS. 



[part I. 



Niu - 



K 



i I 



b. TlIRYOMANES.* 



There are three strongly inarkod geographical varieties, if not 

 epeeies of " Bewick's Wren," separable by quite constant characters. 

 Of these the Mexican {leuco(inder) and the typical form from eastoru 

 North America {bewickii) differ most in coloration, while the western 

 (spilurus) is intermediate in this respect, but with a longer bill than 

 in the other two. The peculiarities of the three forms may bo ex- 

 pressed by the following diagnosis : — 



Var. be'97ickil. — Above dark rnfous-brown ; rump and middle tail feathers 

 sometimes a little paler, and very slightly tinged with gray, and together 

 with the exj)Osed surface of secondaries distinctly barred with dusky. 



Beneath soiled p' ibeous whitish; flanks brown. Crissum banded; 



ground color of quills and tail feathers brownish-black. 



Var. leucogaater. — Above ashy-brown ; rump and middle tail feathers 

 brownish-ash — the former nearly pu'» ash; without appreciable bars; 

 bars on secondaries obsolete. Beneath, including inside of wing, jnire 

 white, with little or no brownish on the sides. Crissum banded ; ground 

 color of the quills and tail feathers grayish-brown. 



Var. spilurus. — Similar to bcwickli in color, the bill considerably longer. 

 Length from nostril, .50, gape, .81, instead of .39 and .70. 



Young birds from all the localities differ from adults merely in 

 liaving the feathers of the throat and breast very narrowly and in- 

 conspicuously edged with blackish. 



Thryothoriis bei^ickii, vai. beiirickil. 



Troglodytes hewirkii, Am. Orn. Biog. I, 1831, 96, pi. xviii. — In. B. A. 

 11, lf41, 120, pi. \\b.— Thryothorus hewirkii, Bonaf. List, 1838.- 

 Baikd, Birds N. Am. 1858, 3G3. — Telmatmhjtes bewickii, Cab. Mus. 

 Hein. I, 1850, 78. 



Hab. Eastern province of United States. 



Locality. 



CarllHle, Pa. 

 Liberty Co., Qa. 

 Macon, Oa. 



When 

 Collected. 



April .SO, '46. 

 Oct. 1848. 



Received from 



S. F. Bfttrd. 

 Prof. Lecoute. 



Collected by 



Thryotlioriis liewickii, var. Kpilxirun. 



Troglodytes spilurus, Viooiis, Zool. Boechey's Voyage, 1839, 18, pi. iv, 

 fig. 1 (California). 



' Thryomnnes, Sclater, Catal. Am. Birds, 1»61, 22. (Type Troglodytes 

 bewickit, var. spilurus.) 



