Genera of Humming Birds. 371 



margined at tips with pale buff. Lateral and outermost ones 

 pale buff. Chin and ear-coverts black. Throat buff; just 

 under it, in the centre, is a large spot of dark green feathers 

 appearing quite black. Breast shining bronzy-green. 



Abdomen and flanks pale buff. Undertail-coverts shining 

 green, edged with buff. Wings purple. Maxilla black. 

 Mandible flesh-colour for a little more than half its length, 

 the rest black. 



Total length, 4^in Wing, 2\. Tail, i^. Culmen, if. 



Female. — Upperside like the male. Chin brownish-black. 

 A band of pale buff on the upper part of breast. Sides of 

 breast and flanks shining green with rufous edges. Rest of 

 underside grayish-brown, white in the centre of abdomen. 

 Lateral rectrices purplish with buffy-white tips. Outermost 

 ones pale buff with a broad purplish tip. 



Slightly smaller than the male. 



I have also two specimens, one from Pebas, collected by 

 Hauxwell, and one from Napo, collected by Buckley. They 

 differ in having a white band on each side of the black of the 

 chin, the band of the throat is buff but narrower, the black 

 band under it is also narrower, the abdomen is grayish with a 

 rufous tinge, and the two outermost rectrices are largely 

 margined on outer webs and with blackish-purple tips. 



If it should prove a distinct species, I propose the name of 

 T. haiixwelli for it, as he collected it before Buckley. On 

 the label it has the date of 26/6/67. 



503. Threnetes ruckeri, Bourcier, P.Z.S., 1847, p. 46. 

 Polytmus ruckeri, Gray, Gen. Birds, vol. i., p. 108. 

 Glaucis ruckeri^ Gould, Mon. Troch., vol. i,, p. 11. 

 Rucker's Hermit, Gould, Mon. Troch., vol. i., p. 11. 



Le Glaucis de Rucker, Muls., His. des Ois Mou., 1873, t. i., 

 p. 48. 



Habitat. — Veragua, Ecuador. 



Maie. — Upperside shining green, darker on the head. 

 Median rectrices shining green, darker near the tips which 

 are white. Lateral and outermost ones white at base, then 

 bluish-black with white tips. Auriculars, chin, and upper 

 part of breast black, lower part of breast rufous, a buffy stripe 

 behind the eye. Abdomen and flanks brownish-gray washed 



