274 BROOKLYN INSTITUTE MUSEUM. SCIENCE BULLETIN 2. 6. 



h'. Back not striated (no pale markings). 



i. Greater and middle wing-coverts more or less con- 

 spicuously tipped, edged, or spotted with white, buff, 

 or black. 

 j. None of the rectrices tipped or marked with white. 

 k. Lateral toes with claws not reaching to base of 

 claw of middle toe. 

 /. Wing coverts with small white or whitish 



apical spots Myrtnoderas atroihorax. 



I'. Wing coverts with subapical black spots Myrmeciza boucardi grisei- 



pectus. 

 k'. Lateral toes with claws reaching to or beyond 

 the base of the claw of the middle toe. 

 I. Feathers of chin and throat black, at least 



basally d'ad Myrmopagis haematono- 



ta haemaionota. 

 I'. Feathers of chin and throat not black, 

 even at base. 

 m. Middle of back dusky gray, not greatly 



different from remainingupper parts d'Myrmeciza schisiacea. 



m' . Middle of back rufous, quitedifferent from 

 remaining upper parts. 

 n. Throat ochraceous buff, remaining lower 



parts tawny olive 9 Myrmopagis haemaionota 



haematonola. 

 n'. Throat pale (whitish), remaining lower 



parts gray or brownish gray Terenura spodioptila. 



j'. Some or all of the rectrices tipped or edged with 

 white (in C. iyrannina the white tips to tail-feathers 

 are almost obsolete) . 

 k. General color of under-parts yellow or yellowish. Herpsilochmusfraler. 

 k'. General color of under-parts black, gray or pale 

 buffy. 

 I. A concealed white dorsal spot. 



m. General color, above and below, black d'Cercomacra nigricans. 



m' . General color, above and below, gray. 



M. Shoulder patch white d'Cercomacra iyrannina. 



n'. Shoulder patch slate gray like wing- 

 coverts (pale markings on wing-coverts 



almost obsolete) d'Cercomacra cinerascens. 



I'. No concealed white dorsal spot. 



m. Back black or slate black Myrmolherula melaena. 



m' . Back smoke gray or cinnamon brown. 



n. LTpper-parts cinnamon brown Microrhopias orenocensis. 



n'. Upper-parts smoke gray Microrhopias cano-fumosus. 



i. Greater and middle wing-coverts unmarked (some 

 males of Cercomacra cinerascens have obsolete pale 

 markings on coverts). 



j. General color above and below slate gray Cercomacra cinerascens. 



j'. General color above and below not gray. 



k. Dorsal concealed spot white 9 Cercomacra Iyrannina. 



k'. No concealed dorsal spot. 



/. With hazel crown patch Ilapalocercus meloryphtis. 



I'. No crown patch. 



m. .\bove grayish olive 9 Myrmopagis axillaris. 



(9 Myrmopagis melaena. 

 9 Myrmopagis schisticolor in- 

 terior, 

 a. "Second phalanx of middle toe partly united to outer toe; acrotarsium 

 fused (booted) " ' (Pithys, Hylophylax, Anoplops). 

 b. Back marked either with rounded buff or white spots or narrow white, 

 or buffy, apical bands to the feathers. 

 c. Markings on back rounded — white or buffy. 



d. Back markings white Hylophylax punctulala. 



d'. Back markings cinnamon buff Hylophylax naevia naevia. 



c'. Back markings in the shape of narrow apical, white or cinnamon 

 buff, bands to the feathers. 

 d. Apical margins to back feathers white. 



f ^Hylophylax poecilinota poe- 



e. Entire under parts including throat dark gray i cilinota. 



1 9 Hylophylax poecilinota lepi- 

 [ donoia. 

 e'. Under parts ochraceous buff brightening to rufous on the 



throat and darkening to buffy brown on the flanks $ Hylophylax poecilinota lepi- 



donota. 

 d'. Apical margins of back feathers cinnamon buff, (forehead, sides 



of head and chin ferruginous, remaining under parts gray) 9 Hylophylax poecilinota peo- 



cilinota. 



iRidgway, Birds N. & M. America, V: 1911: p. 16. 



