28 PENARD — A NEW HUMMINGBIRD [ P Voi!vnV' 



Loral and suborbital region dusky. Under parts hazel to cinnamon-brown 

 of Ridgway, darker on chest and throat, paler on abdomen and flanks. 

 Chin buffy to white. Under tail-coverts pale brown with paler, nearly 

 white, margins, the central portions olive grayish. Under wing-coverts 

 greenish and blackish. Bill heavy and slightly but distinctly decurved. 

 Mandible yellow, except the tip which is dusky. Culmen blackish, yellow- 

 ish in middle portion, with yellow lateral grooves in basal two thirds of 

 maxilla. Inter-ramal space yellow like the rami. Feet yellowish. 



Measurements (in millimeters). — Type, adult: wing, 63.0; tail, 40.0; 

 culmen, 29.6. 



In coloration this species bears a remarkable resemblance 

 to Glaucis hirsuta, but the head is metallic greenish bronze 

 like the back, and not entirely dusky as in Glaucis hirsuta. It 

 may, moreover, be readily distinguished from any member of 

 the genus Glaucis by its heavy, depressed, less strongly de- 

 curved bill, which is characteristic of the genera Heteroglaucis 

 and Threnetes. From Threnetes it differs in having yellow 

 grooves on each side of the culmen, and in the absence of inter- 

 ramal feathers. 



I have dedicated this new hummingbird to my mother. 



