1096 MR, C. E. HELLMAYR ON THE 



In coloration, thei'e is no constant difference between the birds 

 from the foot-hills (Noanama, Novita, Tado, Sipi) and those 

 from the more elevated districts (Jimenez, 1600 to 2900 ft. ; Rio 

 Oscuro, 3000 ft,). The former are, however, on the average, smaller, 

 and have a shorter, slenderer bill, while the males from Jimenez, 

 etc., in dimensions, agree with skins from Bogota and Buca- 

 ramanga. 



The females also are rather variable. Most of them have the 

 top and sides of the head turquoise-blue, scarcely darker than in 

 the female of D. c. ultraifnarina from Panama, while in two or 

 three these parts are of the same dark ultramarine-blue colour as 

 in Bogotd skins of D. c. coerehicolor. 



From what I haVe said above, it is evident that the majority 

 of the West Colombian birds are not typical coerehicolor ; but in 

 view of their great individual variation, which completely connects 

 napaea, of Santa Marta, and ccerehicolor, of the Eastern Cordillera, 

 it seems inadvisable to separate them subspecifically since the new 

 " form " would mainly consist of " intermediates." One thing, 

 however, results fi-om the study of that series, viz., that both 

 napaea and coerehicolor are merely geographical races of D. cayana, 

 the passage being formed by D. c. ultramarina. Thus, we have 

 the following forms : — 



(a) D. c. cayana Linn. Eastern South America from Southern 



Brazil to Trinidad, Guiana and Venezuela. 



(b) D. c. glaucogidaris Berl. & Stolzm. * From the eastern 



slopes of the Colombian Andes south through Peru to 

 Eastern Bolivia and Western Brazil (Mattogrosso). 



(c) D. c. callaina Bangs f. Chiriqui and S.W. Costa Rica 



(Pozo Azul etc.). 



(d) D. c. ultramarina Lawr. % Isthmus of Panama, Eastern 



Costa Rica, E. Nicaragua. 



(e) D. c. napaea Bangs §. Santa Marta District, N. Colombia. 



(f) D. c. cosrehicolor Scl. Andes of Colombia (Western and 



Eastern Cordillera) and N.W. Ecuador. Typical in the 

 Eastern Cordillera. 



On some future occasion I hope to give more details about the 

 variation and geographical distribution of the various races. 



21. Chlorophanes spiza exsul Berl. & Tacz. (?) 



[^Motacilla spiza Linnpeus, Syst. ISTat. x. p. 188 (1758 — ex 

 Edwards : Surinam).] 



Chlorophanes spiza exsul Berlepsch & Taczanowski, P. Z. S. 

 1883, p. 543 (1884— Chimbo, S.W. Ecuador). 



* P. Z. S. 1896, p. 336 (Central Peru: La Gloria, La Merced). 

 + Proc. Biol. Soc. Wash, xviii. p. 154 (1905. — Divala, Chiriqui). 

 t Proc. Acad. N. Sci. Philad. 1864, p. 106 (Isthmus of Panama). 

 § Proc. Biol. Soc. Wash. xii. p. 143 (1898.— Santa Marta). 



