1917.] Chapman, Distribution of Bird-life in Colombia. 305 



The correct sexing of these specimens is indicated by their small size and 

 by the collector's comments on the condition of the sexual organs which 

 were in one case much enlarged. These specimens have somewhat more 

 brownish on the abdomen than adult males and are more bronzy above. 



The type of Heliangelus exortis soderstromi Oberh. (Proc. U. S. N. M., 

 1902, p. 334), from western Ecuador, can be closely matched by these 

 undoubted Colombian females, and although it is sexed " c?," and was 

 'collected' by Goodfellow and Hamilton, the skin resembles a native-made 

 skin and is in my opinion that of a female. If this be true, the characters 

 attributed to H. e. soderstromi are sexual, not racial. 



Cerro Munchique, 2; La Florida, 1; Andes w. of Popayan, 4; Alma- 

 guer, 8; Salento, 1; Laguneta, 27; Santa Isabel, 3 ; Sta. Elena, 4; El Eden, 

 1; Fusugasuga, 7; El Roble, 8; ElPinon,,!. 



Measurements of Males 



Cerro Munchique (2) 

 Laguneta (4) 



Sta. Elena (3) 



Fusugasugd (3) 



El Roble (3) 



Andes west of Popayan (2) 

 Laguneta (2) 



El Roble (5) 



(1342) Metallura williami {Delatt. & Bourc). 

 Trochilus williami Delatt. & Bourc, Rev. ZooL, 1846, p. 308 (Popayan). 



Foimd only in the Paramo Zone at the Central Andes. Bourcier's 

 type, now in the American Museum, has the wing about four millimeters 

 longer and the bill a millimeter shorter than in any bird of our series. The 

 tail varies from greenish to purplish blue. 



Valle de las Pappas, 1 ; Santa Isabel, 10. 



(1348) Metallura tyrianthina tyrianthina (Lodd.). 



Trochilus tyrianthinus Lodd., P. Z. S., 1832, p. 6 (Popayan). 

 Metallura tyrianthina Wyatt, Ibis, 1871, p. 377 (Bucaramanga to Pamplona, 

 9000 ft.); ScL. & Salv., P. Z. S., 1879, p. 529 (Sta. Elena). 



