308 Bulletin American Museum of Natural History. [Vol. XXXVI, 



This constancy of marking, and the fact that in at least one range of the 

 Andes, the green-throated and purple-throated forms occupy the same zone, 

 lead me to believe that we have here two distinct species both of which pre- 

 sent somewhat similar subspecific variations. 



Cyanolesbia berlepschi from northeastern Venezuela I have not seen. 

 Its description Hartert (Bull. B. 0. C, VIII, 1898, p. XVI) shows that the 

 male closely resembles the male of kingi, but the female differs from that 

 of any known species in having the abdomen wholly white. It is, therefore, 

 nearer to the female of ccelestis in which the breast is white, than to that of 

 the remaining species of the group. 



All of these are well represented in our collections, and a study of their 

 variations in connection with the information we have gathered concern- 

 ing the faunal affinities of the regions they inhabit, leads me to group them 

 as below: 



Key to Males. 



Throat green 



Tail green C. emmce 



(Western and Central Andes, Col.). 

 Tall blue C. caudata 



(Western Andes, Ven.) 

 Throat purple or bluish 

 Tail green 



Throat purple C. mocoa mocoa 



(Andes at head of Magdalena Valley southward in Eastern Andes to Ecuador). 

 Throat bluish C. mocoa smaragdina 



(Bolivia; Peru). 

 Tail blue 



Underparts green 



Upperparts darker green C kingi kingi 



(Eastern Andes ^ Bogotd Region, Col.) 

 Upperparts lighter green C. kingi margarethce 



(Caracas region, Ven.). 

 Underparts coppery C. ccelestis 



(Western Andes of Colombia and Ecuador). 



I observe no evidence of the intergradation of kingi with mocoa as is 

 stated more fully under that species ; but margarethce of the mountains about 

 ■Caracas is an obvious racial representative of the Bogota form from which it 

 differs but slightly. 



Whether the ranges of margarethce and kingi are actually separated by a 

 region (Merida) in which the green-throated caudata alone occurs is not 

 known. 



El Roble (8000 ft.) above Fusugasuga, 4; Choachi, 1. 



