CHERRIE: ORNITHOLOGY OF THE ORINOCO REGION. 265 



b'. Tips of rectrices very slightly or not at all decurved. 



c. Lores and chin buffy gray, general color of under parts a dark 

 Isabella color (Ridgway's Color Standards), wing usually more 



than 100 mm Dendrocinda olivacea phae- 



ochroa. 

 c'. Lores dusky gray, chin whitish, general color of under parts brown- 

 ish olive, wing usually less than 100 mm Dendrocinda merula. 



a'. Nostrils rounded, operculum Indistinct or absent. 



b. Bill very long and slender and much curved Campylorhamphus Irochilir- 



ostris. 

 b'. Bill not unusually long, slender or much curved. 



c. Back noi marked with pale or buffy shaft lines or stripes (at least 

 not indicated on more than anterior part of mantle and then in 

 combination with a whitish bill). 



d. Top of head not marked with shaft lines or spots Xiphocolaptes major. 



d'. Top of head distinctly marked with shaft lines or spots. 



e. Feathers of back marked with indistinct transverse dusky bars Dendrocolapies certhia. 

 e'. Feathers of back without any indication of transverse bars. 

 /. Large, total length more than 25 cm.; wing more than 120 



mm Nasica longirostris. 



/'. Smaller, total length less than 25 cm.; wing less than 120 

 mm. 

 g. Crown marked with narrow, pale, buffy shaft streaks .... Dendroplex picus picus. 

 g'. Crown marked with broadly guttate buffy shaft spots .... Dendroplex pidrostris. 

 c'. Back distinctly marked with buffy shaft lines or stripes, bill 

 blackish. 

 d. Under parts, including under tail-coverts, with distinct, well 



defined, pale, buffy streaks Picolaples albolineakis. 



d'. Streaks on under parts, // extending to crissum and under tail- 

 coverts, then not distinct or well defined. 

 e. Feathers of chin and upper throat narrowly edged with dusky 

 or blackish. 

 /. Distance from nostrils to tip of bill greater than length of 

 tarsus. 

 g. Chin and upper throat whitish or pale buffy, cutting edge 



of maxilla distinctly decurved at the tip Xiphorhynchus jardinei. 



g'. Chin and upper throat ochraceous buff, cutting edge of 



maxilla nearly straight Xiphorhynchus pardalotus. 



/', Distance from nostrils to tip of bill noi greater than length 



of tarsus Xiphorhynchus obsoletus no- 

 talus. 

 e'. Feathers of chin and upper throat not edged with dusky or 

 blackish. 



/. Under tail coverts strongly washed with rufous Xiphorhynchus gultatus gul- 



laloides. 

 /'. Under tail coverts uniform with abdomen, faintly, or not at 



all washed with rufous Xiphorhynchus susurrans. 



SiTTASOMus AMAZONus Lafresiiayc. 

 Sittasomus amazonus Lafr., Rev. Zool. 1850. p. 509, 590; Berlepsch & 



Hartert, p. 62. 

 Sittasomus sylviellus amazonus Hellmayr, Novit. Zool. XVII: 1911 : 



p. 323 (Caura, Venezuela). 



Not observed by the writer, but Berlepsch and Hartert record it 

 from Suapure on the Caura River. 



■ Glyphorhvnchus cuneatus cuneatus (Lichtenstein). 

 Dendrocolapies cuneatus Licht., Abh. Kon. Akad. Wiss. Berl. 1820. p. 



204, PI. 2, fig. 2. 

 Glyphorhynchus cuneatus Berlepsch & Hartert, p. 62. 



Common at the falls of Maipures and beyond. Specimens were 

 collected at Maipures, Nericagua, Munduapo and Capuano. Ber- 

 lepsch and Hartert record specimens from Suapure, La Pricion and 

 Nicare on the Caura River. 



