170 CHARACTERS OF THE WHITE-BELLIED WREN 



Thryothorus bewkkil var. ICUCOgaSter, Bd. Rev. AB. i. 1864, 127 (not Trog. leucogastra 

 Gould, PZS. 1836, 89, which is of a different genus). Ooues, Key, 1872. 86. Yarr. <$ 

 Hensh. Rep. Orn. Specs. 1874, 9. Hensk. ibid. 41. B. B. $ R. NAB. i. 1871, 147. 



Tbryothorus ? ewicki b. leucogaster, Coues, BNW. 1874, 31. 



Thryothorus bewicki var. leucogaster, Hensh, ListB. Ariz. 1875, 155; Expl. W. 100 M. 183. 



Thrlothorus leucogaster, Coop. Am. Nat. m. 1869, 474, 479. 



White-bellied Wren, Authors. 



c. spilurus. 



TroglOditCS bewickii, Ornith. Comm. Journ. Phila. Acad. vii. 1837, 193. 



Troglodytes bewickii, Towns. Journ. Phila. Acad. 1839, .154. Gamb. Pr. Phila. Acad. iii. 1846, 



113. Newb. PRRR. vi. 1857, 80. ? Xant. Pr. PhiU. Acad. 1859, 191 (Fort Tejon). 



Heerm. PRRR. x. 1859, 40. C. ff S. NHWT. 1860, 189. 

 Thryothorus bewicki, Brown, Ibis, 1868, 421 (Vancouver). 

 Thryothorus bewickii <m spilurus, Bd. Rev. AB. i. 1864. 126. Coues, Key, 1872, 86.-B. B. 



4 R. NAB. i. 1874, 147. Nels. Pr. Bost. Soc. xvii. 1875, 357. 

 Thryothorus bewickii c. spilurus, Ooues, BNvV. 1874, 31. 



Troglodytes Spilurus, Pig. Zool. Voy. Bloss. 1839/18, pi. 4. f. ]. Bp. CA. i. 1850, 222. 

 Thryothorus spilurus, Coop. B. Gal. i. 1870, 69, fig. 



HAS. Eastern United States, north to the Middle States and Minnesota. 

 Var. leucogaster, Southwestern United States and southward in Mexico. 

 Var. spilurus, Pacific coast of the United States and Lower Califoruia. 



OH. SP. $ 9 Cinereo-brunneus, infra cinereo-albus; strigd 

 superciliari alba; caudd nigric&nte, rectricibus mediis cinereo- 

 multifasciatis, cceteris albo-terminatis, pogonio exteriore rectricis 

 extimce albo-fasciato. 



$, adult: Above uniform clear ashy-brown. Below clear ashy-white, 

 pure white on the middle parts. A long, strong, white, superciliary stripe 

 from .the nostrils to the sides of the nape, and auriculars speckled with white. 

 A number of concealed white spots on the rump, which only show on dis- 

 turbing the plumage. Quills of the wings fuscous, the inner feathers very 

 obsoletely waved with the color of the back. Two middle tail-feathers 

 closely and regularly barred with pure dark ash and black ; the others 

 black, with irregular white or ashy-white tips, the outer web of the exterior 

 feather barred with white. Length, 5-5f inches; extent, Of; wing, 2-2 ; 

 tail, 2-2 ; bill, | ; tarsus, f . 



This is the best marked of the races currently quoted, in the clearer ashy- 

 brown of the upper parts, white shaded with pure ash rather than with 

 brown on the under parts, obsoleteness of the transverse marking on the 

 inner secondaries, abundance and size of the concealed white spots on the 

 rump, and length of the tail. The Pacific crJast form ( T. spilwm Vig.), which 

 shares this length of tail, has the bill even longer (about f) and the browner 

 coloration of typical bewicki] the spots on the rump are as numerous as in 

 the Coloradoan form. 



A technical point affecting nomenclature here requires passing notice. 

 This bird is not Troglodytes leucogastra of Gould, as supposed by Professor 

 Baird, Gould's bird being the same that was afterward described as Cyphorinua 

 pmillus by Dr. Sclater (P. Z. S. 1859, 372), and consequently not even of the 

 same genus. The Cyphorinus would consequently stand as C. leucogaster 

 (Gould), and the Thryomanes remain T. bewicki leucogaster (Baird, 1864). See 

 Ibis, 1874, p. , where the point is elucidated by Mr. Salvin. In the " Nomen- 

 clator Avium Neotropicalium " (p. 155), Gould's bird is made the type of a new 

 genus and called Uropsila leucogastra. 



