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BIRDS OF NORTH AND MIDDLE AMERICA.
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- jj. Rictal region feathered, postocular region partly naked smaller forms (total length about 100 mm.) with coloration much variegated
Hypocnemis (extralimital).[1]
- ii. Frontal or loral regions, or both, scantily feathered (sometimes quite bare).
- j. Loral and suborbital regions (sometimes forehead and crown also) bare or but scantily bristled; adult males uniform black (with white markings on wing-coverts).
- ii. Frontal or loral regions, or both, scantily feathered (sometimes quite bare).
Gymnocichla (p. 97).
- jj. Loral and suborbital regions feathered (only the postocular and rictal regions naked); adult males not black (or else without white markings on wing-coverts).
- l. Tail less than four-fifths as long as wing; bill stouter; nostrils smaller, more rounded; forehead more thinly feathered, the feathers semi-decomposed, semi-erect.
- jj. Loral and suborbital regions feathered (only the postocular and rictal regions naked); adult males not black (or else without white markings on wing-coverts).
Myrmeciza (p. 103).[2]
- ll. Tail more than five-sixths as long as wing (sometimes longer than wing); bill more slender; nostrils larger, more longitudinal; forehead more densely feathered, the feathers more compactly webbed, decumbent.
Myrmoderas (extralimital).[3]
- dd. Plumage harder, very dense and compact, only the tail-coverts semi-decomposed or loose webbed.[4] (Formicarieæ.)
- e. Tail less than two-thirds as long as wing; plumage of rump not abnormally long and dense; feathers of latero-frontal antiæ short and dense, not antrorse, not extending above nostril; bill relatively longer and less depressed basally, the exposed culmen as long as middle toe without claw; under parts neither streaked nor barred.
- dd. Plumage harder, very dense and compact, only the tail-coverts semi-decomposed or loose webbed.[4] (Formicarieæ.)
Formicarius (p. 115).
- ee. Tail more than two-thirds as long as wing; plumage of rump very long and dense; feathers of latero-frontal antiæ longer, antrorse, extending anteriorly, above the nostril, to anterior end of nasal fossæ; bill relatively shorter and more depressed basally, the exposed culmen much shorter than middle toe without claw
Chamæza (extralimital).[5]
- ↑ Hypocnemis Cabanis, in Wiegmann's Archiv für Naturg., xiii, pt. i, 1847, 212. Type, Turdus tintinnabulatus Gmelin = Formicarius cantator Boddaert. (Guiana and upper Amazon Valley; two species.)
- ↑ Including Myrmelastes Sclater, which I am unable to separate generically.
- ↑ Myrmoderas Ridgway, Proc. Biol. Soc. Wash., xxii, April 17, 1909, 70. Type Myiothera loricata Lichtenstein. Besides the type, the following species (placed in Myrmeciza by Dr. Sclater) also belong here: M. cinnamomea (Gmelin), M. ruficauda (Maximilian), M. squamosa (Pelzeln), and M. atrothorax (Boddaert); probably also Myrmeciza pelzelni Sclater and M. hemimelæna Sclater, which, however, I have not seen. The group ranges from the Guianas and Amazon Valley to southeastern Brazil.
- ↑ I am not at all satisfied with these characters, but am unable to find better ones for separating these two exceedingly distinct genera from the rest, collectively. They doubtless possess marked anatomical differences, for they certainly stand clearly apart from all the rest of the family.
- ↑ Chamæza Vigors, Zool. Journ., ii, 1825, 395. Type, C. meruloides Vigors = Turdus brevicaudus Gmelin. — Chamæzosa (emendation) Cabanis, in Wiegmann's Archiv für Naturg., i, 1847, 218. (Colombia to southeastern Brazil; six species.).
