BIRDS OF NORTH AND MIDDLE AMERICA. 527 



Timolia Mulsant, Ann. Soc. Linn. Lyon, n. t^., xxii, 187(), 219 (Cat. Ois.-Moiich., 

 1876, 23). (Type, Thalurania lerchi Mulsant, and Verreaux.) 



Gmelinius « Boucard, Genera of Humming Birds (in Humming Bird, iv, pt. 1), 

 March, 1894, 108. (Type, Trochilus bicolor Gmelin.) 



Medium-sized or rather large Trochilidjie (length about 100 mm.) 

 with bill about as long as head, straight, rather broad and depressed 

 basally, thicker (in vertical section) subterminally than in middle 

 portion, nasal operculum mostly unfeathered, tail nearly two-thirds 

 as long as wing, emarginate, with rather broad rectrices, the adult 

 male metallic-green above and below, passing into dark blue on 

 head and upper tail-coverts and dark steel-blue on tail; the female 

 light brownish gray below, middle rectrices bronze-green, lateral 

 rectrices gray or bronze-greenish basally, steel-blue (broadly) sub- 

 terminally, and tipped with light gray. 



Bill about as long as head, straight, narrowly cuneate in vertical 

 profile, contracted vertically in middle portion, or thickened, ver- 

 tically, toward tip ; culmen broadly rounded but basally contracted 

 into a rather distinct ridge; tomia smooth; mandible with a rather 

 distinct longitudinal groove or sulcus nearer to tomium than to 

 gonys, the maxilla with a similar but less distinct sulcus along each 

 side of culmen. Nasal operculum broad, strongly convex and 

 decumbent basally, mostly unfeatliered ; frontal feathering forming 

 two narrow antiae (one on each side of mesorhinium), extending to 

 beyond middle of nasal operculum. Tarsus feathered on upper 

 anterior portion; middle and inner toes ec{ual in length, the outer 

 (apparently) slightly shorter; hallux shorter than outer toe. Wing 

 a little more than three times as long as exposed culmen, the outer- 

 most primary longest. Tail nearly two-thirds as long as wing, 

 emarginate, the rectrices rather broad. 



Coloration. — Adult male rather dark metallic-green above and 

 below, passing into deep blue on head and upper tail-coverts, the tail 

 uniform dark steel-blue; adult female light brownish gray beneath, 

 bronze-green above (including middle rectrices), the outer rectrices 

 gray or bronze-greenish basally, steel-blue (broadly) subterminally, 

 and tipped with pale gray or grayish white. 



Range. — Colombia to Brazil; Lesser Antillean islands of Dominica 

 and Martinique. (Seven species.*) 



KEY TO THE SPECIES OF CYANOPHAIA .'' 



a. Upper tail-coverts bluish black, like rectrices. (Islands of Dominica and Mar- 

 tinique, Lesser Antilles.) Cyanophaia bicolor (p. 529). 



a Named for Johann Friedrich Gmelin. 



b Of these I have seen only one (C. hicolar) on which the above diagnosis and 

 description are based exclusively. 



c Adapted from Hellmayr, Novit. Zool., v, no. 1, June, 1908, 7, 8. Of the seven 

 species recognized by Hellmayr I have seen only C. bicolor. 



