DENDfiORNIS. 181 



3. Dendrornis erythropygia. 



Dendrornis triangularis, Scl P. Z. S. 1856, p. 289' ; Scl. & Salv. P. Z. S. 1879, p. 622 ^ 

 Dendrornis erythropygia, Scl. P. Z. S. 1859, pp. 365 \ 381 * ; Cat. Birds Brit. Mus. xv. p. 131 ' ; 



Scl. & Salv, Ibis, 1860, p. 35 ^ ; P. Z. S. 1864, p. 355 ' ; Elliot, Auk, vii. p. 187 \ 

 Supra obscure olivacea, secundariis extus, dorso postioo, uropygio et Cauda rubiginosis, pilei et dorsi antici 

 . plumis medialiter pallide cervinis, illorum maculis latioribus guttiformibus : subtus obscure olivacea, 

 plumis singulis medialiter pallide cervinis iis guise tantum olivaceo limbatis; alls subtus rubiginosis 

 fusco terminatis : rostro corneo, mandibula pallida. Long, tota 9-0, ate 4-7, caud»4-l, rostri a rictu 1-5' 

 tarsi 0-95. (Descr. maris ex Cofre de Perote, Mexico. Mus. nostr.) 

 2 mari similis. 



Hah. Mexico, Jalapa [de Oca % Coatepec, Huatusco {F. Ferrari-Perez), Cofre de Perote 

 {M. Trujillo), Cordova {Salle i), Chilpancingo {Mrs. H. H. Smith), Oaxaca 

 {Boucard *) ; Guatemala, El Rincon in San Marcos ( W. B. Bichardson), Las 

 Nubes on the slope of Cerro Zunil, Coban ^, Chisec, and Choctum in Vera Paz 

 {0. S. & F. D. G.) ; Panama, Lion Hill {M'Leannan '^). — South America, 

 Bolivia 2. 



The only differences between this species and its near ally 2>. triangularis consist in 

 the lovper back being chestnut like the wings and tail instead of olive, and in the wings 

 being more rufescent. 



It was long considered that one form of this Dendrornis {B. erythropygia) belonged 

 to Central America, whilst the other {B. triangularis) was found in the southern 

 continent, and specimens in collections were generally so named according to locality. 

 But it now appears that the more northern bird has a wide range in South America, 

 examples from Bolivia being inseparable from the Mexican bird. B. triangularis 

 appears to be confined to a comparatively small tract of country lying within the 

 hunting-grounds of the bird-collectors of Bogota, to the valley of the Cauca, and to 

 Venezuela. A third form {B. pimctigula) occurs in Costa Eica and elsewhere, whose 

 range is mixed with that of the present bird in a way difficult of explanation ; this 

 bird is mentioned below. 



Bendrornis erythropygia was discovered near Cordova in Mexico by M. Salle ^, and 

 specimens were contained in his first collection described by Mr, Sclater in 1856 ; its 

 difference from B. triangularis was, however, not noticed until a few years afterwards, 

 when both Boucard ■* and de Oca ^ had also found it. It is now known as a fairly 

 common bird in the State of Vera Cruz, whence it spreads southwards through Guate- 

 mala, where it occurs on both sides of the main mountain-range. In South-western 

 Mexico we know of its occurrence only in the Sierra Madre del Sur, in the State of 

 Guerrero. 



