BIRDS OF NORTH AND MIDDLE AMERICA. 537 



THALURANIA RIDGWAYI Nelson. 



MEXICAN WOOD-NYMPH. 



Adult male. — Forehead and crown metallic violet-blue; occiput, 

 nape, and sides of hinder crown (superciliary region) dark metallic 

 bluish green, appearing nearly black when viewed from in front; 

 hindneck, back, scapulars, wing-coverts, and rump uniform metallic 

 bronze-green, the upper tail-coverts darker; tail uniform black, 

 faintly glossed with bluish; remiges dusky, faintly glossed with vio- 

 laceous; malar and rictal regions, chin, throat, and chest bright 

 metallic yellomsh emerald green; rest of under parts dull blackish, 

 the sides and flanks glossed Avith metallic bronze-green; bill black; 

 iris dark brown; feet blackish; length (skin), 96; wing, 56; tail, 

 35.5; culmen, 17.« 



Adult female unknown. 



Western Mexico, in State of Jalisco (San Sabastian). 



Thalurania ridgwayi Nelson, Auk, xv-ii, no. 3, July, 1900, 262 (San Sabastidn, 

 Jalisco, s. w. Mexico; coll. U. S. Nat. Mus.). 



Genus LEPIDOPYGA Reichenbach. 



Lepidopyga Reichenbach, Troch. Enum., 1855, 7. (Type, Trochilus goudoti 



Bourcier.) 

 Emilia Mulsant and Verreaux, Mem. Soc. Imp. Sci. Nat. Cherb., xii (ser. 2, 



ii), 1866, 165, in text (Classif. Troch., 1866, 41). (Type, Trochilus goudoti 



Bourcier.) 

 Arinia (not of Adams, 1858, nor Schin [?], 1862) Mulsant, "Ann. Soc. Linn. 



Lyon, 1877, Oct. 12." & (Type, A. boucardi Mulsant.) 

 Arena (not of Fauv[ier?], 1862) Mulsant, Descr. d'une esp. nouv. de Troch., 



Oct. 12, 1877, 5. (Type, A. boucardi Mulsant.) 



Rather small Trochilidse (length about 85-95 mm.) related to 

 Agyrtria, but differing in relatively much longer and distinctly 

 forked tail, much narrower lateral rectrices, and more naked tarsi. 



Bill longer than head, rather stout, terete, very faintly decurved; 

 culmen broadly rounded, but mesorhmal portion distinctly ridged; 

 tomia smooth; median lateral sulci of maxilla and mandible rather 

 indistinct. Nasal operculum moderately broad, feathered for up- 

 perposterior portion or inner half (more or less). Tarsus feathered 

 for upper half (more or less), rather slender; middle and inner 

 toes equal in length or the former sUghtly the longer, outer toe 

 slightly but distmctly shorter; hallux shorter than outer toe. Wing 

 nearly three times as long as exposed culmen, the outer primary 



a One specimen (the type). 



6 "Thus quoted in 'The Ibis' and ' Zool. Rec' (1878) from a specimen copy of 

 this paper, but not published in the work alluded to." (Salvin, Cat. Birds Brit. 

 Mus., xvi, 1892, 193, footnote.) 



