BIRDS OF NORTH AND MIDDLE AMERICA. 269 



miiially; maxillary tomiiiin gently but decidedly concave, dis- 

 tinctly notched subterminally. Nostril broadly oval or ovate, 

 overhung posteriorly by membrane, its f)osterior end in contact, or 

 veiy nearly so, with feathering of frontal antiae. Rictal bristles 

 distinct. Wing rather long, the longest primaries exceeding longest 

 secondaries by nearly as much as distance from nostril to tip of 

 maxilla; outermost (tenth) primary more than half as long as ninth 

 (sometimes more than half as long as longest), ninth longer than 

 longest secondaries (intermediate between second and third), the 

 sixth and fifth, or seventh, sixth, and fifth, longest. Tail slightly 

 shorter than distance from l)end of wing to tij) of longest secondaries, 

 distinctly rounded (graduation decidedly less than distance from 

 nostril to tip of maxilla), the rectrices rather rigid. Tarsus less than 

 one-third as long as wing, rather slender, the acrotarsium scutellate 

 but scutella sometimes indistinct, especially on outer side; middle 

 toe (without claw) about two-thirds as long as tarsus; lateral toes 

 unequal, the inner (without claw) reaching to subterminal joint of 

 middle toe, the outer to slightly beyond ; hallux shorter than middle 

 toe but much stouter; basal phalanx of middle toe united for about 

 half its length to outer toe, at base onh' to inner toe; claws normal 

 as to size and curvature. 



Coloration. — Upper parts uniform sooty brown, under parts white, 

 with sides and flanks sooty brown or grayish brown. 



Nidification. — (Unknown.) 



Range. — Lesser Antilles (islands of JSlartinique and Santa Lucia). 

 (Two species.) 



KEY TO Till-: srEClES OF RAMrHOCINCLUS. 



a. Sides and flanks light grayish brown, much paler than upper parts; smaller (adult 

 male averaging, wing 96.5, tail 77.3, exposed culmen 23.4, tarsus 30.2; adult 

 female, wing 98.4, tail 77.2, exposed culmen 22.7, tarsus 29.9). (Island of 



Martinique, Lesser Antilles.) Ramphocinclus bachyurus (p. 2()9; 



aa. Sides and flanks dark sooty brown, as dark as color of upper parts; larger (adult 

 male averaging, wing 105.2, tail 83.5, exposed culmen 26, tarsus 33.4; adult 

 female, wing 107.7, tail 87.7. exposed cidmen 25.7, tarsus .34.3). (Island of 

 Santa Lucia, Lesser Antilles Ramphocinclus sanctae-lucise (p. 270) 



RAMPHOCINCLUS BRACHYURUS (Vieillot). 



WHITE-BREASTED TREMBLER. 



Adults {sexes alike). — Above plain deep sooty brown (between sepia 

 and clove brown) , the wings and tail darker (blackish brown or clove 

 brown) ; loral, suborbital and auricular regions and upper margin of 

 malar region uniform black or blackish brown; most of malar region, 

 chin, throat, chest, breast, and abdomen, white; sides, flanks, and 

 under tail-coverts grayish brown (decidedly paler than color of upper 

 parts), the under tail-coverts usually margined, more or less distinctly. 



