( 359 ) 
the former, nor deep ochraceous like the latter, but light creamy buff, in decided 
contrast to the colour of the belly. The cheeks and malar region are bright buff 
with narrow dusky cross-lines. 
Type in Tring Museum: No. 158, ? ad., Calama, 3. vii. 1907 (W. Hoffmanns 
coll.). 
This adds another to the three forms of the H. myotherina group of which I 
have given a review in Nov. Zool. xiv. 1907. pp. 20-2. While the male does not 
much differ from the same sex of H. m. melanolaema, the female may be 
recognized at a glance from H. m. melanolaema and H. m. ochrolaema, although 
in its characters it stands somewhat between the two. It shares the pale 
greyish lower mandible with H. m. melanolaem2, but in the deep ochraceous colour 
of the belly it agrees with H. m. ochrolaema, which is found on the Tapajéz as well 
as farther down on the right bank of the Madeira near Borba. The latter form, 
however, has the lower mandible blackish like the upper one, and the throat deep 
ochraceous like breast and abdomen, whereas in the female of the new race the 
throat is pale creamy buff, very much paler than, and in strong contrast to, the rest 
of the under parts. The cheeks and malar region are brighter buff, variegated with 
dusky in sororia, uniform deep ochraceous in ochrolaema. 
The upper parts are rather variable, being sometimes dull greenish olive as in 
ochrolaema, sometimes warm olive-brown with a more or less distinct rufescent 
tinge as in melanolaema. Snuperciliary streak and white dorsal patch as in 
ochrolaema. Most of the specimens have a number of small, dusky olive spots on 
the foreneck, but in two skins (Nos. 20, 932) these are scarcely indicated. 
The young females (Nos. 12, 125) are more olive, less brownish, on the upper 
parts, the rufescent olive superciliary streak is barely indicated, there is scarcely 
any white at the base of the dorsal feathers, the belly is much paler, the 
throat nearly pure white, and the upper wing-coverts lack the ochraceous apical 
bands. 
The male from Paraizo, provisionally referred to H. m. melanolaema, doubtless 
belongs to the present race. e . 
H. m. sororia farnishes another instance of rivers separating the ranges of 
nearly allied forms. It would be interesting to know the meeting-point of 
H. m. sororia and H. m. ochrolaema, both of which occur on the right bank of the 
Rio Madeira, the latter near its mouth, the former farther up the stream. 
[236. Hypocnemis myotherina ochrolaema Hellm. 
Hypocnemis myotherina ochrolaema Hellmayr, Bull. B. O. C. xvi. p. 109 (1906.—Itaitiiba, left bank 
of the Tapajéz) ; idem, Nov. Zool. xiv. 1907. p. 379 (Borba). 
H. myiotherina (nec Spix) Pelzeln, J.c. p. 88 (Borba). 
Right bank, lower Rio Madeira: Borba (Hoffmanns, Natterer). 
This form extends eastwards to the left side of the Tocantins (Aramathena, 
Alcobaca).* Miss Snethlage has kindly sent the two specimens for my inspection. 
The male is practically identical with one from Borba, while the female slightly 
differs from those obtained at Itaittiba and Borba, by having the lower mandible 
dusky with the extreme base pale yellowish (instead of uniform black). : 
In all the females of H. m. ochrolaema the throat is deep ochraceous like the 
rest of the under parts. ] 
* Journ. f. Orm, 1908. p. 533, 
