DENDECECA. 1ST 



gradatim latins albis; rostro et pedibus nigricantibus. Long, tota 4-8, alas 2-5, caudae 2-2, roatri a 

 rictu 0-5, tarsi 0-75. (Descr. maris ex Parada, Mexico. Mus. nostr.) 

 $ man simUis, sed coloribus magis fuscescentibus gula quoque alba distinguenda. (Descr. exempl. ex 

 Mexico. Mus. nostr.) 



Eab. North America, Eocky Mountains to the Pacific. — Mexico, Guanajuato {Bug^s % 

 Tierra fria {le Strange), Orizaba (Sumichrast % Eeal Ariba {Beppe, Mus. BeroL), 

 La Parada (Boucard^), Oaxaca (Boucard^, FenocMo). 



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. Salle's earlier collections, nor yet in those of de Oca. 



The first specimens of B. nigrescens that reached Europe were doubtless those 

 (still in the Berlin Museum) obtained at Keal Ariba in Mexico by Deppe. But the 

 first description of it was by Townsend ^, 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 B. nigrescens, drawn partly from his- 

 own observations of it at Fort Whipple, Arizona ^. 



14. Dendroeca virens. 



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. S. 1856, p. 291 . 



Dendrceca virens, Scl. & Salv. Ibis, 1859, p. IP ; P. Z. S. 1864, p. 347^ Scl. P. Z. S. 1859, pp. 363 \ 



373'; Lawr. Ann. Lye. N. Y. vii. p. 293', ix. p. 94°; BuU. U.S. Nat. Mus. no. 4, p. 15^°; 



Baird, Eev. Am. B. i. p. 182"; Sumichrast, Mem. Bost. Soc. N; H. i. p. 546''; v. Prantzius, 



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, 



Vail. i. p. 240 '^ Newton, P. Z. S. 1879, p. 552'". 



Supra olivacea, maculis celatis nigris notata, capitis lateribus tete flavis, stria per oculos ducta dorso concolori, 

 gula tota cum pectoris lateribus nigris, hypoohondriis nigro striatis, corporis subtus reliquo albo ; alis et 

 Cauda nigris cinereo limbatis, illis albo bifasciatis, hujus rectricibus tribus externis pro majore parte albo 

 gradatim latins notatis ; rostro et pedibus nigricantibus. Long, tota 4-4, alee 2-5, caudse 2-0, rostri a 

 rictu 0-6, tarsi 07. (Descr. maris ex Duenas, Guatemala. Mus. nostr.) 



5 mari similis, gula et pectoris lateribus albis nee nigris distinguenda. 



BIOL. CENTB.-AMBE., Aves, Vol. 1, February 1881. 18 



