DENDRORNIS. 181 
3. Dendrornis erythropygia. 
Dendrornis triangularis, Scl. P. Z.S. 1856, p. 2891; 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. 835°; P.Z. S. 1864, p. 83557; Elliot, Auk, vii. p. 187°. 
Supra obscure olivacea, secundariis extus, dorso postico, 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 gule tantum olivaceo limbatis; alis subtus rubiginosis 
fusco terminatis : rostro corneo, mandibula pallida. Long. tota 9-0, ale 4°7, caude 4:1, rostri a rictu 1°5 
tarsi 0°95. (Descr. maris ex Cofre de Perote, Mexico. Mus. nostr.) 
© mari similis. 
Hab. Muxico, Jalapa (de Oca*), Coatepec, Huatusco (F. Ferrari-Perez), Cofre de Perote 
(M. Trujillo), Cordova (Sallé'), Chilpancingo (Mrs. H. H. Smith), Oaxaca 
(Boucard*); Guatemata, El Rincon in San Marcos (W. B. Richardson), 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").—Sovutn AMERICA, 
Bolivia ?. 
The only differences between this species and its near ally D. triangularis consist in 
the lower 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 (D. erythropygia) belonged 
to Central America, whilst the other (D. 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. JD. 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 (D. punctigula) occurs in Costa Rica and elsewhere, whose 
range is mixed with that of the present bird in a way difficult of explanation ; this 
bird is mentioned below. 
Dendrornis erythropygia was discovered near Cordova in Mexico by M. Sallé1, and 
specimens were contained in his first collection described by Mr. Sclater in 1856; its 
difference from ). 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. 
