DENDRECA. 137 
gradatim latius albis; rostro et pedibus nigricantibus. Long. tota 4:8, ale 2°5, caude 2°2, rostri a 
rictu 0°5, tarsi 0°75. (Descr. maris ex Parada, Mexico. Mus. nostr.) 
2 mari similis, sed coloribus magis fuscescentibus gula quoque alba distinguenda. (Descr. exempl. ex 
Mexico. Mus. nostr.) 
Hab. Nortu America, Rocky Mountains to the Pacific—Muxtco, Guanajuato (Dugeés 3), 
Tierra fria (le Strange), Orizaba (Sumichrast®), Real Ariba (Deppe, Mus. Berol.), 
La Parada (Boucard *), Oaxaca (Boucard*®, Fenochio). 
This species of western North America spreads southwards in winter over Central 
Mexico as far as the State of Oaxaca, beyond which it has not yet been noticed. It 
would seem to be restricted to the higher districts, specimens occurring in collections 
from the tablelands of Mexico and the higher mountain-ranges of Oaxaca up to 10,000 
feet; but in Orizaba it is rare, according to Prof. Sumichrast; and it was not included 
in any of M. Sallé’s earlier collections, nor yet in those of de Oca. 
The first specimens of D. nigrescens that reached Europe were doubtless those 
(still in the Berlin Museum) obtained at Real Ariba in Mexico by Deppe. But the 
first description of it was by Townsend 1, who found the species some years afterwards 
in the forests of the Columbia river, where it was abundant. Since then it has been 
observed in California and the Rocky Mountains by many collectors, and was redis- 
covered in Mexico by M. Boucard in 1858. 
It probably breeds in the Rocky Mountains from Arizona northwards to the limits 
of its range. Nuttall describes its nest as made of fibrous green moss, and as suspended 
between two small twigs in the upper branches of an oak ?. 
Dr. Coues gives a good epitome of the habits of D. nigrescens, drawn partly from his 
own observations of it at Fort Whipple, Arizona °. 
14. Dendreca virens. c 
Motacilla virens, Gm. Syst. Nat. i. p. 985°. 
Sylvia virens, Licht. Preis-Verz. mex. Vog. p. 2° (cf. J. f. Orn. 1863, p. 57). 
Rhimamphus virens, Scl. P. Z.8. 1856, p. 291°. 
Dendreca virens, Scl. & Salv. Ibis, 1859, p.11*; P.Z.S. 1864, p. 347°; Scl. P. Z. S. 1859, pp. 363 °,. 
373"; Lawr. Ann. Lye. N. Y. vil. p. 293°, ix. p. 94°; Bull. U.S. Nat. Mus. no. 4, p. 15%; 
Baird, Rev. Am. B. i. p. 182"; Sumichrast, Mem. Bost. Soc. N. H.i. p. 546°; v. Frantzius, 
J.f. Orn. 1869, p. 293"; Salv. P. Z.S. 1870, p. 182"; Baird, Brew. & Ridgw. N.-Am. B. i. 
p- 261”; Gundl. Orn. Cub. p. 64"; Merrill, Pr. U.S. Nat. Mus. i. p. 124; Coues, B. Col. 
Vall. i. p. 240%; Newton, P. Z.S. 1879, p. 552”. 
Supra olivacea, maculis celatis nigris notata, capitis lateribus late flavis, stria per oculos ducta dorso concolori, 
gula tota cum pectoris lateribus nigris, hypochondriis nigro striatis, corporis subtus reliquo albo; alis et 
cauda nigris cinereo limbatis, illis albo bifasciatis, hujus rectricibus tribus externis pro majore parte albo 
eradatim latius notatis ; rostro et pedibus nigricantibus. Long. tota 4:4, ale 2°5, caude 2-0, rostri a 
rictu 0-6, tarsi 0°7. (Descr. maris ex Duefias, Guatemala. Mus. nostr.) 
© mari similis, gula et pectoris lateribus albis nec nigris distinguenda. 
BIOL. CENTR.-AMER., Aves, Vol. 1, February 1881. 18 
