BIRDS OF NORTH ANB MIDDLK AMERICA. 61 7 



Genus NANNORCHILUS Ridgway. 



J^opsila't (not Uropnilv.i Edwards, 1872) Scla'I'kh and Salvin, Nom. Av. Neotr., 



1873,155. (Type, IVoglodytes leucogasira GoxM.) 

 ITemiura (not Ifemhiras Rudolphi,& 1809, nor Gervais, '' 1855) Ridgway, Proc. 



U. S. Nat. Mus., X, Aug. 6, 1888, 511 (substitute for Uropsila Sclater and 



Salvin, preoccupied). 

 Xitmiorchilusil RiDinvAV, Proc. Biol. Soc. AVash., xvii, A])r. 9, 1904, 102. (Type, 



Troglodytes leucogastra Gould. ) 



Very small Troglodytidas (wing between 45 and 54 mm.) resembling- 

 Troglodytes^ but with bill distinctly notched, nostril small, roundish or 

 broadly oval, nonoperculate, opening in lower anterior portion of 

 nasal fossa, tail less than two-thirds as long as wing, and under parts 

 pale gray or grayish white, the upper grayish brown. 



Bill shorter than head, straight, compressed beyond nostrils, its 

 depth at latero-frontal antise equal to much less than half the distance 

 from nostril to tip of maxilla, decidedly greater than its width at same 

 point; exposed culmen much shorter than tarsus (sometimes a little 

 longer, sometimes a little shorter, than middle toe without claw), 

 straight, or nearly so, for basal half (more or less) then gradually 

 decurved terminally; gonys much shorter than distance from nostril 

 to tip of maxilla, straight; maxillary tomium straight for most of its 

 length but faintly decurved both terminallj^ and basally, distinctly 

 notched subterminallj' ; rictus distinctly but gradually deflexed. Nos- 

 tril small, longitudinally oval, nonoperculate, but with the naked 

 membrane of nasal fossa surrounding it except on lower side. Rictal 

 bristles obvious, two of them quite distinct. Wing short, much 

 rounded; seventh, sixth, and fifth primaries longest and about equal; 

 eighth shorter than fourth; ninth shorter than first, decidedly' less 

 than twice as long as tenth. Tail short, slightlj^ more than three-fifths 

 as long as wing, much rounded, the rectrices with broadly rounded tip. 

 Tarsus much longer than exposed culmen or middle toe and claw, 

 about two-fifths as long as wing, the acrotarsium distinctly scutellate, 

 the planta tarsi booted; outer toe (without claw) reaching to decidedly 

 beyond subterminal joint of middle toe, its claw falling ver}' slightly 

 short of middle claw; inner toe slightly shorter than outer but reach- 

 ing to a little beyond subterminal joint of middle toe; hallux (without 

 claw) equal to outer toe (without claw), but much thicker, its claw 

 much shorter than the digit; basal phalanx of middle toe adherent to 

 outer toe for nearlj'- or quite its entire length, to inner toe for more 

 than half its length. 



Coloration. — Plain grayish brown above, the remiges very faintly, 

 the rectrices more distinctly, barred with dusky; superciliary stripe 



a " Ovpoi, Cauda, et ipiXbi, tenuis." cExped. Castelnau, i, Mam., 1855, 101. 



^Entozoorum Hist. Nat., rt, 1809, i, 38. 'iNdi'voi, dwarf; ipxi^o^, a wren. 



