204 FORMICARIIDA, 
Thamnophilus doliatus is a bird of the hot and temperate regions, where it is found 
ranging from the sea-level to an altitude of 5000 or 6000 feet in the mountains. It 
oceurs as far north in Eastern Mexico as Tampico, and is abundant in the State of 
Vera Cruz, and thence southwards to the State of Panama. It appears not to be ~ 
found in Western Mexico north of the State of Oaxaca, but occurs in the isthmus of 
‘Tehuantepec, and abundantly on the Pacific side of the cordillera of Guatemala. 
It frequents the denser brush-wood, keeping near the ground, and uttering at intervals 
a loud ery, which may be heard at a considerable distance. 
9. Thamnophilus nigricristatus. | 
Thamnophilus doliatus, Lawr. Aun. Lyc. N. Y. vii. p. 293 (nec Linn.) *. 
Thamnophilus radiatus, Scl. & Salv. P.Z.S. 1864, p. 355 (nec Vieill.)*; Salv. P.Z.S. 1870, 
p. 194°. 7 
Thamnophilus nigricristatus, Lawr. Pr. Ac. Phil. 1865, p. 107°; Scl. Cat. Birds Brit. Mus. xv. 
p- 209°. 
T. doliato similis, sed plumis pilei omnino nigris distinguendus. 
2 quam femina 7’, doliati pallidior, gula albicantiore immaculata. (Descr. maris et femine ex Panama. 
Mus. nostr.) 
Hab. Panama, Mina de Chorcha, Chitra 3, Calovevora 3, Calobre (Arcé), Paraiso Station 
(Hughes), Lion Hill Station (Md‘Leannan'?*).—Soutn America, from Colombia 
and the Upper Amazons Valley to Matto Grosso in Brazil °. 
Though separated in 1865 as a distinct species by Mr. Lawrence ¢, this bird has been 
generally considered inseparable from J. radiatus, until Mr. Lawrence’s name was 
again restored to it by Mr. Sclater in his ‘Catalogue’®, though he there expressed 
great doubt as to its distinctness even from 7. doliatus. Count von Berlepsch, too, 
has further divided this form by naming the Upper Amazonian birds 7. subradiatus. 
We are unable to distinguish between the Amazonian and Colombian birds, to which 
the title 7. nigricristatus is applicable; but the true 7. radiatus seems to be distinct, 
the under surface of the male being much less banded and even almost white along 
the middle of the abdomen, and the female a much whiter bird beneath than that sex 
of the more northern bird. 
T. nigricristatus may readily be distinguished from 7. doliatus in the male by the 
feathers of the crown, which are black to their bases, and in the female by the lighter 
coloured and unspotted chin and throat. 
The range of this bird in Central America is limited to-the State of Panama, where 
it appears to be found alone as far as the middle of the State; in the district of Chiriqui 
it occurs with 7. doléatus, which entirely supplants it to the north. | 
We are unacquainted with the nest and eggs of either this species or of 7. doliatus. 
But Salmon says that an allied bird (7. multistriatus) builds a hanging nest and lays 
whitish eggs, which are thickly spotted and streaked at the larger end with red-brown. 
