FAMILY TROGONIDAE 381 



Back, breast and central tail feathers brown. 



Collared trogon, Trogon collaris, female, p. 404 



15. Crown and hindneck black, dark blue, or slate-gray 16 



Crown and hindneck metallic green or brown 17 



16. Smaller, wing less than 120 mm., culmen less than 19 mm. 



Gartered trogon, Trogon violaceus concinnus male and female, p. 415 

 Larger, wing more than 130 mm., culmen more than 21 mm. 



White-tailed trogon, Trogon viridis chionurus, male and female, p. 400 



17. Crown, hindneck and upper breast green, males 18 



Crown, hindneck and breast brown, females 19 



18. A distinct white band across breast; lower breast and abdomen orange; 



edge of eyelids (in life) black; white bands and tip on tail narrow. 



Orange-bellied trogon, Trogon a. aurantiiventris, male, p. 409 



White breast band not clearly evident ; lower breast and abdomen yellow ; 



edge of eyelids (in life) light blue; white bands and tip on tail broad. 



Graceful trogon, Trogon rufns tenellns, male, p. 412 



19. Outer webs of outer rectrices white, finely mottled with dusky, edge of 



eyelids (in life) black. 



Orange-bellied trogon, Trogon a. aurantiiventris, female, p. 409 



Outer webs of outer rectrices white, banded with black, edge of eyelids 



(in life) light blue. Graceful trogon, Trogon rufus tenellus, female, p. 412 



PHAROMACHRUS MOCINNO COSTARICENSIS Cabanis: 

 Quetzal 



Figure 45 



Pharomachrus costaricensis Cabanis, Journ. f. Orn., vol. 17, September 1869, 

 p. 313. (Costa Rica.) 



Large ; male with a narrow, compressed crest, and greatly elongated, 

 narrowed, upper tail coverts that may be twice the length of the tail. 

 Female with bushy crest, and upper tail coverts long, but extended 

 little, if at all, beyond the tail. 



Description. — Length (from anterior end of bill to end of tail), 

 exclusive of elongated upper tail coverts, 330-370 mm. ; cutting edge 

 of bill smooth except for a subterminal notch ; nostril elongated, 

 narrow ; middle wing coverts long and curved, completely concealing 

 the greater coverts. Adult male, with feathers of side of head long, 

 appressed, projecting forward to cover most of bill, and extending 

 vertically to meet those of the opposite side in a laterally compressed 

 crest. Upper surface, including all of head, lesser and middle wing 

 coverts, upper tail coverts, foreneck, and upper breast metallic green 

 to golden green, changing to bluish green in some with shift in angle 

 of light; three outer tail feathers white with black shafts; others 

 slate to blackish slate; wings, greater coverts and hidden bases of 

 middle and lesser coverts black ; posterior under surface intense red, 



