212 TIMELIIDiE. 



The Bolivian Wren, as far as is known, only occurs in Bolivia. 

 Although the type specimen of T. giiarai/anus of l^afr. & d'Orb. is 

 not to be fonnd in the Paris Museum, the description leaves little 

 doubt of its identity with the species afterwards called T. fulviis by 

 Dr. Sclater. 

 a. Ad. sk. Bolivia. Mr. Bridges [C.]. 



9. Thryophilus rufalbus. 



Tliriotliovus rufalbus, Lafr. Rev. Zool, 1845, p. 337. 



Troglodytes rufalbus, Grnt/, Gen. B. i. p. 158; id. Hand-l. B. i. p. 190, 



no. i".i53. 

 Thrvothorus rufalbus, Bp. Consp. i. p. 221 ; Sclater, P. Z. S. 18o(i, 



p." 140; .be/, c^- Scdv. Ibis, 1859, p. 8; iid. P. Z. S. 18G4, p. 345; 



C(ih. J. f. O. 1860, p. 408 ; Sclater, Cat. Amer. B. p. 20 ; Lmvr. 



Arm. Lye. N. Y. viii. pp. 5, 175 ; von Frantz. J.f. 0. 1869, p. 291 ; 



Sah: P. Z. S. 1870, p. 181. 

 Troglodj-tes cumauensis, Licht. Nomencl. Av. p. 34. 

 Thryothorus longirostris, Laivr. Ann. Lye. N. Y. vii. p. 320 (nee V.). 

 Thryophilus rufalbus, var. rufalbus, Baiid, Bevieto Amer. B. p. 129. 

 Thryophilus rufalbus, var. poliopleura, Baird, t. c. p. 129. 

 Thryophilus rufalbus, Lmvr. Ann. Lye. N. Y. ix. p. 92 ; Sclater 8f Salv. 



Koniencl. Av. Neutr. p. 6; Salv. ^ Godm. Ibis, 1880, p. 116; iid, 



Biol. Centr.-Amer., Aves, i. p. 82. 

 Troglodytes poliopleurus, Gray, Hand-l. B- i- P- 190, no. 2599. 



Adult. General colour above chestnut-rufous, rather duUer on the 

 head, the least and median series of wing-coverts like the back ; 

 greater aud primary-coverts rufous like the back, faintly barred 

 with blackish cross lines ; quills dusky brown, the outer webs rufous 

 barred with blackish, the inner secondaries barred across both webs, 

 the outer primaries not externally barred ; tail-feathers rufous, 

 barred with blackish brown, the bars on the centre feathers nar- 

 rower than on the outer ones ; lores and a narrow eyebrow white, 

 the feathers bordered with black, separating the eyebrow from the 

 crown by a narrow black line ; sides of face ashy white, the feathers 

 edged with blackish, giving a narrowly streaked appearance ; sides 

 of neck broadly streaked with black and white ; along the npper 

 edge of the ear-coverts a streak of rufous-brown feathers ; under 

 surface of the body pure white, the sides of the body light rufescent 

 brown, the sides of the breast and sides of the abdomen Avashed 

 with a shade of ashy ; under tail-coverts duU white, broadly barred 

 across with black, slightly edged with rufous ; under wing-coverts 

 and axillaries white, mottled with blackish spots on the feathers ; 

 quills ashy brown, whitish along the edge of the inner web. Total 

 length 5-75 inches, culmen 0-S, wing 2-65, tail 2-2, tarsus 0-95. 



Young. Differs from the adult in being much darker and browner 

 in colour above, with the bars on the secondaries and tail-feathers 

 smaller and less defined ; the under surface of the body is duU ashy 

 grey with olive-brown margins to the feathers ; under tail-coverts 

 duU rufous-brown, uniform. 



OI).s. It is impossible to separate the Guatemalan bird {Thr;/o- 

 phihis poliopleurus, Baird) from T. rufalbus. The more northern 



