BIRDS OF NORTH AND MIDDLE AMERICA. 189 
(not ridged) posteriorly, the plantar scutella forming a single series 
which bends around from the outer to the inner side, where separated 
from the inner edge of the acrotarsium by a distinct groove; middle 
toe, with claw, longer than tarsus; outer toe, without claw, not 
reaching to middle of subterminal phalanx of middle toe, the inner 
toe very slightly shorter; hallux as long as outer toe, but much 
stouter; basal phalanx of middle toe wholly united to outer toe, for 
about half its length to inner toe; claws moderate in size‘and curva- 
ture, that of the hallux shorter than the digit. Plumage rather thin, 
but feathers mostly broad and distinctly outlined, those of rump and 
flanks more elongated and lax; feathering of head very short (scale- 
like on superciliary region and sides of neck), the rictal and postocular 
regions naked. 
Coloration.—Above brownish, with a concealed white dorsal patch; 
wings black with two buffy or fulvous bands (tips of middle and 
greater coverts) and an oblique band of same across subterminal por- 
tion of primaries; a broad white band across inner webs of remiges 
near base; under parts of body gray, the throat and upper chest 
black in male, rufous-tawny in female. 
Range.—Nicaragua to Cayenne and Ecuadér. (Two species.*) 
KEY TO THE SPECIES OF RHOPOTERPE. 
a. Inner webs of remiges crossed by a band of white; remiges without buff or tawny 
terminal spots; upper tail-coverts and tail cinnamon-rufous. (Cayenne and 
British Guiana to eastern Ecuadér.).........Rhopoterpe torquata (extralimital).> 
aa. Inner webs of remiges crossed by a band of buff or tawny; remiges tipped with a 
buff or tawny spot; upper tail-coverts and tail brown. (Eastern Nicaragua.) 
Rhopoterpe stictoptera (p. 139). 
RHOPOTERPE STICTOPTERA Salvin. 
RICHARDSON'S ANTTHRUSE. 
Allied to R. torqguata and of the same size and for the most part 
similar in coloration; but top of head darker, rump and tail more 
fuscous, outer web of remiges with a distinct terminal spot of fawn 
@The above description is based entirely on the type of the genus, R. torquata 
(Gmelin). R. stictoptera Salvin, of Nicaragua, which I have not seen, is apparently 
very similar in coloration, but has the band across inner webs of remiges fulvous 
instead of white. 
bFormicarius torquatus Boddaert, Tabl. Pl. Enl., 1783, 43 (Cayenne; based on Le 
Fourmillier de Cayenne Daubenton, Pl.-Enl., pl. 700, fig. 1).—Rhopoterpe torquata 
Sclater, Proc. Zool. Soc. Lond., 1858, 275; Cat. Birds Brit. Mus., xv, 1890, 298.— 
[Turdus] formicivorus Gmelin, Syst. Nat., i, pt. 2, 1788, 828 (based on Fourmillier de 
Cayenne Daubenton, Pl. Enl., pl. 700, fig. 1).—Myrmothera formicivora Vieillot, Nouv. 
Dict. d’Hist. Nat., xii, 1817, 114, pl. D. 26.—Rhopoterpe formicivora Cabanis, Wieg- 
mann’s Archiv fiir Naturg., 1847, pt. i, 228.—Formicivorus palikour Temminck, Cat. 
Syst. Cabinet d’Orn., 1807, 93 (new name for Turdus formicivorus Gmelin).— Myto- 
iurdus palikour Ménétriés, Mém. Acad. St. Petersburg, sér. vi (Sci. Nat.), 1 (Livr. 5), 
1835, 470. 
