1904.] 



NATURAL SCIENCES OF PHILADELPHIA. 



451 



even to scarcely striated. Specimens examined, including one from 

 the type locality, and compared with the type and other examples of 

 tyrannina, show brunnea to be an easily recognizable race, which its 

 describers hastened unnecessarily to suppress.^ There seems to ba 

 no doubt, however, of its being only subspecifically distinct. 



Dendrocincla longicauda Pelzeln. 



Dendrocinda longicauda Pelzeln, Orn. Bras., 1S6<S, p. 60. 



Type Locality. — Borba, Amazonas, Brazil. 



Geographical Distribution. — Lower Amazon to British Guiana. 



Evidently a very good species, though not seen, differing conspicu- 

 ously from Dendrocincla tyrannina in its reduced size, and particularly 

 by reason of its comparatively much longer tail. 



Dendrocincla atrirostris (d'Orbigny and Lafresnaye). 



Dendrocolapies atrirostris d'Orbigny and Lafresnaye, Mag. de Zool., 1838, 



CI. ii, p. 12. 

 Dendrocincla minor Pelzeln, Orn. Braz., 1868, p. 60 (San Vicente, Matto 



Grosso, Brazil.) 



Type Locality. — Guarayos, Bolivia. 



Geographical Distribution. — Eastern Bolivia and southwestern 

 Brazil. 



Apparently a very distinct species, as pointed out by Mr. Ridgway,^ 

 though for some time confused with Dendrocincla olivacea lafresnayei, 

 but really much more closely allied to tyrannina and longicauda than 

 to either lafresnayei or olivacea. From D. tyrannina tyrannina it 

 differs principally in much smaller size ; rather paler upper and much 

 paler lower parts ; very conspicuous postocular stripe ; and the more 

 ashy chin and cheeks. The two tj^es in the Lafresnaye collection 

 (Nos. 2,308 and 2,309) are the only specimens of this species that have 

 been examined. Both are apparently not quite adult, though fully 

 grown; one of them is considerably more olivaceous than the other, 

 but this seems imdoubtedly to be only an individual difference. They 

 measure as follows: 



* Cf. Saltadori and Festa, Boll. Mus. Zool. ed Anat. Comp. Torino, XV, 

 1899, No. 362, pp. 26-27. 

 5 Proc. U. S. Nat. Mus., X, 1888, p. 493. 

 ® Tip of maxilla broken. 



