208 SYNOPSIS OF THE HUMMING-BIRDS. 



Hab. Guiana. 



Adult. " This is a very little species, with a long thin bill ; its breast is green as 

 in the others. Centre of the abdomen white ; under tail coverts white, except in 

 the centre, when they are dark brown ; two centre tail feathers bronzy-green, except 

 at the extreme tip which is greenish-black, the next on each side bronze for half 

 their length, then black ; the three outer ones on each side bronzy-green at base, 

 then broadly zoned with black, next to which they are green, and lastly white. 

 Total length, 3| in. Bill, | in. Wing, 2 in. ^ Tail, li in."— (Gould, loo. cit.) 



18. *Agyrtria luciae. 



Thaumatias lua'cc, Lawr., Proc. Acad. Nat. So. Phil. (1867), p. 233. — Mui.s., Hist. Nat. Ois. Mouch., torn, i, 

 p. 241.- Elliot, Ibis (1878), p. 52. 



Hab. Honduras. 



"Upper plumage dull bronzy dark green, crown duller; upper tail coverts a 

 lighter bronzy-green, somewhat golden ; tail feathers dull bronzy-green, all except 

 the two central ones broadly marked near their ends with dark purplish-bronze, 

 the tips being ashy-gray; the throat and breast are glittering bluisli-green, middle 

 of the abdomen white; wings brownish-purple. Upper mandible black, the under 

 yellow with the end blackish ; feet black. Length, 3f in. Wing, 2g in. Tail, 1| 

 in. Bill, jl in." — (Lawr., loc. cit.) 



19. Agyrtria nigricauda. 



Tliaumafias nigricauda, Elliot, Ibis (1878), p. 47. 



Hab. Trinidad, Guiana, northeastern Brazil. 



Adult. Upper parts bronzy-green, darkest on the head, and shading into purple 

 on the upper tail coverts. Throat and breast shining metallic grass-green. Flanks 

 dark green with scarcely any lustre. Middle of abdomen, vent, and under tail 

 coverts pure white. Tail steel-black, the two outermost feathers greenish-gray at 

 their tips, the next merely edged with white on the tip. Maxilla brownish-black; 

 mandible flesh-color, tip black. Feet black. Total length, 3| in. Wing, 2| in. 

 Tail, 1^ in. Bill on culmen, f in. (From type in my collection.) 



20. Agyrtria nitidicauda. 



Thaumatias nitidicauda, Elliot, Ibis (1878), p. 48. 



Hab. Guiana. 



AduU. Upper part bright bronze-greent 'with a slight coppery tinge on the head. 

 Chin Avhite. Throat, breast, and sides of the neck bright metallic grass-green. 

 Flanks and abdomen dull green. Middle of abdomen, vent, and under tail coverts 

 pure white. Median rectrices bronze-green. Lateral ones purplish-black, the edges 

 of the outer webs and tips bronze-green. Wings purplish-brown. Bill flesh-color 

 (perhaps red in life), with a dark tip. Total length, Z\ in. Wing, 21 in. Tail, 

 \\ in. Bill along culmen, f in. (Type in my collection.) 



