A COLLECTION OF BIRDS FROM TONKIN. 



221 



p. 277 (part.); Blanford, F. Br. Ind., Bds., IV, p. 240 (part.); Grant, P. Z. S. 

 1900, p. 495 (part.); Ai. cantiana Dresser, Pal. Bds., II, p. 737 (part.). 

 One young female (Dec. 19, 191 1) from Lao-kay. 



Aigialitis dubius (Scop.l, Swinhoe, P.Z.S., 1S71, p. 404; David et Oust., 

 Ois. Chine, p. 429; Anderson, W. Yunnan, II, p. 676 ; Ingram, Nov. Zool., 

 XIX, p. 273; Charadrius dubias dubius Scop., Hartert & Jackson, Ibis, 1915, 

 p. 526-534; Ai. dubia Sharpe, Cat. B. Br. Mus., XXIV, p. 263 (part.) ; 

 Blanford, F. B. Ind. Bds., IV, p. 241 (part.) ; Grant, P.Z.S., 1900, p. 495 

 (part.). 



One young male (Dec. 29, 191 1) from Lao-kay. 



The bill in this southern form is distinctly longer and stronger than in 

 Ai. dubia minor. Exposed culmen 15 mm., wing 113 mm. 



14. JEfiiulitis dubia minor ( Wolf & Meyer). 

 Little ringed Plover. 



Algialitis curonica (Gm.), Dresser, Pal. Bds., II, p. 740 ; Charadrius 

 dubius curonicus Gm., Hartert & Jackson, Ibis, 191 5, p. 526-534; Ai. dubia 

 Sharpe, Cat. B. Br. Mus., XXIV, p. 263 (part.); Blanford, F. B. Ind., Bds., 

 IV, p. 241 (part.). 



Three adult males (Nov. 13 ; Dec. 20, 22, 191 1) from Lao-kay. 



Measurements of their bill and wing as follows : 



13. JEgialilis dubia dubia (Scop.). 

 Southern Little ringed Plover. 



Exp. culm. 



Wing 



13 mm. 



in 



mm. 



13.9 mm. 



109 mm. 



14 mm. 



in 



mm. 



The bill is smaller and shorter than in the preceding form. 



