Page:Birds of North and Middle America partV Ridgway.djvu/189

kk. Wing very nearly as long as tail (more than eight-ninths as long), the latter graduated for only half its length; tarsus longer than middle toe with claw; bill relatively shorter and deeper; feathers of chest without thickened or widened shafts.

Phacellodomus (extralimital).^[1]

ii. Bill much more slender, with culmen much less strongly curved (usually nearly straight), less compressed, less sharply ridged; rictus not deflected.

Asthenes (extralimital).^[2]

hh. Tarsus much less than one-third as long as wing; frontal feathers not extending so far forward, the nostrils and nasal operculum being uncovered for much the greater part.

i. Larger (wing more than 70 mm., exposed culmen more than 15 mm.); conspicuously streaked both above and below.

'Thripophaga (extralimital).^[3]

ii. Smaller (wing less than 70 mm., exposed culmen less than 15 mm.); without streaks (except sometimes, on pileum.)

Acrorchilus (p. 183).

ff. Rectrices 10.

g. Tail not more than one and a half times as long as wing (usually much less, sometimes shorter than wing); upper parts not streaked.

Synallaxis (p. 186).

gg. Tail nearly twice as long as wing; upper parts streaked.

Schœniophylax (extralimital).^[4]

ee. Basal phalanx of middle toe wholly united to outer toe; bill more wedge-shaped, with culmen nearly straight (if curved more so toward base than terminally), the mesorhinium flattened; wing relatively longer

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1. Phacellodomus Reichenbach, Handb. der Spec. Orn., 1853, 169. Type, Anahates rufifrons Maximilian. — Phacelodomus (emendation) Sclater, Cat. Birds. Brit. Mus., XV, 1890, 79. — Placellodomus (emendation) Sclater and Salvin, Proc. Zool. Soc. Lond., May, 1868, 141. — Phacellodromus (emendation) Bonaparte, Ann. Sci. Nat. (Zool.), 4 ser., i, 1854, 132.
2. Asthenes Reichenbach, Handb. der Spec. Orn., 1853, 168. Type, Synallaxis sordida Lesson. (Andes of Colombia to Chile, Argentina, etc.; at least eight species.)
   This group unquestionably requires subdivision, but I have not a sufficient representation of the species to justify an attempt to do so. Besides the type-species I have examined the following: A. humicola (Kittlitz), A. modesta (Eyton), A. anthoides (King), A. wyatti (Sclater and Salvin), A. sulphurifera (Burmeister), A. striaticeps (D'Orbigny and Lafresnaye), and A. maluroides (D'Orbigny and Lafresnaye). The three last are almost certainly distinct generically. Probably nearly related to Asthenes, if not actually belonging to it, are the following species, referred, like the others, to Siptornis by recent authorities: S. orbignii (Reichenbach), S. arequipæ (Sclater and Salvin), S. humilis (Cabanis), and S. pudibunda (Sclater). How nearly related may be S. albiceps (Lafresnaye and D'Orbigny) and S. albicapilla (Cabanis) — the former being the type of Cranioleuca Reichenbach (Handb. der Spec. Orn., 1853, 167) — I am unable to say, not having seen either.
3. Thripophaga Cabanis, Wiegmann's Archiv für Naturg., xiii, pt. i, 1847, 338. Type, Sphenura striolata Lichtenstein. (Southeastern Brazil; Colombia?; two species?.)
   I have not seen T. guttuligera Sclater, from Colombia, which may or may not be congeneric with T. striolata.
4. Schoeniophylax Ridgway, Proc. Biol. Soc. Wash., xxii, April 17, 1909, 71. Type, Sylvia phryganophila Vieillot. (Southern Brazil, Paraguay, Uruguay, and Argentina; monotypic?.)