Page:Birds of North and Middle America partV Ridgway.djvu/42

grayish white; under parts without black, except sometimes a jugular area

Herpsilochmus (extralimital).^[1]

hh. Rectrices 10

Drymophila (extralimital).^[2]

ee. Planta tarsi entire (fused).

f. Bill decidedly longer than head, more than one-third as long as wing.

g. Tail four-fifths as long as wing, graduated; exposed culmen longer than tarsus, the latter much less than half as long as wing.

Ramphocænus (p. 84).

gg. Tail but little more than half as long as wing, rounded; exposed culmen much shorter than tarsus, the latter nearly half as long as wing

Microbates (p. 88).

ff. Bill not longer than head (usually shorter), less than one-third as long as wing.

g. Rictal bristles well developed.

h. Rectrices 10; bill much narrower and relatively deeper at base; tarsus longer than commissure

Cercomacra (p. 90).

hh. Rectrices 12; bill much broader and more depressed at base; tarsus shorter than commissure

Thamnomanes (extrahmital).^[3]

gg. Rictal bristles indistinct (usually obsolete).

h. Loral and frontal regions very densely feathered, the feathering erect, plush-like

Pyriglena (extrahmital).^[4]

hh. Loral and frontal regions normally feathered, scantily feathered, or sometimes naked.

i. Frontal and loral regions normally (densely) feathered.

j. Rictal region naked, postocular region wholly feathered; larger forms (total length about 125 mm.), with mostly plain coloration

Myrmobonis (extrahmital).^[5]

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1. Herpsilochmus Cabanis, in Wiegmann's Archiv für Naturg., xiii, pt. i, 1847, 224. Type, Myiothera pileata Lichtenstein. — Dendroæcia Bertoni, Aves Nuevas del Paraguay, 1901, 138. Type, D. erythroptera Bertoni = Myiothera rufimarginata Temminck. (Nearly the whole of tropical South America east of the Andes; about eleven species recognized, of which, however, the present writer has examined only four.) I am not able to find any structural characters separating Herpsilochmus from Microrhopias.
2. Formicivora (not Formicivorus Temminck, 1807) Swainson, Zool. Journ., ii, 1825, 145. Type, Myiothera squamata Lichtenstein. — Drymophila Such (ex Swainson), Zool. Journ., i, Jan., 1825, 559. Type, D. variegata Such = Myiothera ferruginea Lichtenstein. — Ellipura Cabanis, in Wiegmann's Archiv für Naturg., xiii, pt. i, 1847, 228. Type, Myiothera ferruginea Lichtenstein. — Stipituropsis Bertoni, Aves Nuevas del Paraguay, 1901, 141. Type, S. arechavaletæ Bertoni = Formicivora genei De Filippi.
3. Thamnomanes Cabanis, in Wiegmann's Archiv für Naturg., xiii, pt. i, 1847, 230. Type, Lanius caesius Lichtenstein. (Colombia and Guiana to southeastern Brazil and upper Amazon Valley; two species.)
4. Pyriglena Cabanis, in Wiegmann's Archiv für Naturg., xiii, pt. i, 1847, 211. Type, Lanius domicella Lichtenstein = Turdus leucopterus Vieillot. (Ecuador and Peru to southeastern Brazil; five species recognized, of which the present writer has examined only P. leucoptera (Vieillot) and P. atra (Swainson).)
5. Myrmoborus Cabanis and Heine, Mus. Hein., ii, July, 1859, 9. Type, Pithys leucophrys Tschudi. Besides the type species, I would refer the following to this genus: M. myiotherinus (Spix) and M. lugubris Cabanis; probably also Hypocnemis schistacca Sclater and H. melanura Sclater and Salvin, and possibly H. melanopogon Sclater, but these three species I have not seen.