CHERRIE : ORNITHOLOGY OF THE ORINOCO REGION. 2«5 
Herpsilochmus rufimargixatus FRAter Sclater & Salvin. 
Herpsilochnms f rater Scl. & Salv.. P. Z. S. 1880. p. 159. 
Herpsilochmus rufimarginatns fratcr Berlepsch & Hartert, p. 75. 
Not observed on the Orinoco, but recorded from Suapure on the 
Caura River. In the American Musetnn collection is an adult male from 
that point. 
Herpsilochmus sticturus sticturus Salvin. 
Herpsilochmus sticturus Salvin, Ibis 1885. p. 424 ( Bartica Grove, 
British Guiana). 
In the American Museum collection is a specimen from Boca de 
Sina. Cunucunuma River. Upper Orinoco. 
Herpsilochmus sticturus nigrescens Todd. 
Herpsilochmus sticturus nigrescens Todd. Proc. Biol. Soc. Wash. 
XXVIII. 1915, 80 (Type ex Maripa, Rio Caura, Venez.). 
I have not seen this race, that is said to differ from .?. sticturus in 
having a greater admixture of black above and "under parts much 
darker, more grayish, the throat and breast indistinctly striped with 
dusky grayish and white." 
MiCRORHOPiAS CANo-FuMosus (Cherric). 
Formicivora cano-fumosus Cherrie. Sci. Bull. Bklyn. Inst. Mus. I. 1909, 
p. 387. (Type, S , ex Las Barrancas, Delta reg.. Orinoco River, 
Venez.). 
Obser\-ed and taken only in the type locality, where three males 
and three females were collected between July 30th and August 2nd. 
MiCRORHOPiAs^ orenocensis (Hellmayr). 
Formicivora orenocensis Hellmayr, Bull. Br. Orn. CI. XR". 1904. 54 
(Type, ,5 ad: ex. Altagracia, Orinoco River, Venez.) 
Formicivora intermedia Berlepsch & Hartert, p. 75. 
Abundant along the ]\[iddle Orinoco from Cuidad Bolivar to 
Caicara. Keeps chiefly to the low thickets in heavily timbered 
regions. 
Eye seal brown ; bill above black, below slate color ; feet slate color. 
^Microrkopias ritfa. 
Myiolhera rufa Wied, Beitr. Naturg. Bras., iii.. p. logs. 1831. (Bahia). 
Formicivora ruffilra Sclater, Cat. Birds Brit. Mus. X\\ 1S90. p. 251 (Orinoco?) Recorded from the 
Orinoco, with a query by Sclater. 
