BIRDS OF NORTH AND MIDDLE AMERICA. 527 
Timolia Mutsant, Ann. Soc. Linn. Lyon, n. s., xxii, 1876, 219 (Cat. Ois.-Mouch., 
1876, 23). (Type, Thalurania lerchi Mulsant and Verreaux.) 
Gmelinius ¢ Boucarp, Genera of Humming Birds (in Humming Bird, iv, pt. 1), 
March, 1894, 108. (Type, Trochtlus bicolor Gmelin.) 
Medium-sized or rather large Trochilide (length about 100 mm.) 
with bill about as long as head, straight, rather broad and depressed 
basally, thicker (Gn 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 unfeathered; frontal feathering forming 
two narrow antiz (one on each side of mesorhinium), extending to 
beyond middle of nasal operculum. Tarsus feathered on upper 
anterior portion; middle and inner toes equal 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.)...............0..02-00-0 Cyanophaia bicolor (p. 529). 
# Named for Johann Friedrich Gmelin. 
6 Of these I have seen only one (C. bicolor) on which the above diagnosis and 
description are based exclusively. 
« 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. 
