1919-] OrientallVood^jeckers and Barbels. 2l7 



-j-CYANOPS DUVAUCELI. 

 There are at present the following races of this Barbet 

 described : — 



(1) Cijanops diwauceli duvauceli. 



Bucco duvauceli Less. Traite, 1831, p. 164i : 

 Sumatra. 



(2) Cyanops d. borneensis. 



Parrot, Munchen. Abh. Ak. Wiss., Matli.-Phys. 

 Kl. xxiv. 1907, pp. 149, 288 : Borneo. 



(3) Cyanops d. cyanolis. 



Bucco cyanotis Blyth, J. A. S. B. xvi. 1847, p. 485 : 

 Bengal. 



(4) Cyanops d. orienlalis. 



Hobinsou, Ibis, 1915, p. 738: Ok-Yani, Franco- 

 Siamese boundary. 



Cyanops duvauceli is easily divisible into two races — 

 duvauceli duvauceli, a small bird with black ear-coverts and 

 a large black patch on upper breast ; and a larger form with 

 blue ear-coverts and no black patch on upper breast, duvauceli 

 cyanotis. 



The difficulty is in dealing with the intermediate foi-ms, 

 which, in coloration, grade into one another very gradually 

 without having any area in which a stable form has been 

 evolved. 



In size we have, on the other hand, a somewhat more 

 definite dividing line than usual ; but the series available 

 for examination is not large, and it is possible that with a 

 larger one, the sudden dividing line may become less distinct. 



Sikkim Wing- 80-87 mm. Average 83'2. 5 birds. 



Assam „ 78-88 mm, „ 82-0. ]8 „ 



N.Burma „ 77-88 mm. „ 81-9. 9 „ 



Siam „ 82-87 mm. „ 83-5. 8 „ 



Peninsular Burma and 



Siam „ 72-79 mm. „ 76'4. 15 „ 



Malacca and Soutli 



Malay Pemnsula. ... „ 68-79 mm. ,, 752. 24 „ 



Sumatra „ 60-77 mm. „ 73-9. 12 „ 



Borneo „ 73-80 mm. „ 76'5. 11 „ 



r2 



