THE BIRDS OF NORTHERN THAILAND 119 



ers edged buffy or white (males) or ash brown, the feathers with buff 

 edges (females). 



The wings of my specimens measure 115, 114.7, and 108 mm. The 

 first is the molting bird already mentioned ; the measurement has been 

 made to the tip of the second primary. The last is unusually short 

 for this race, but it should be noted that the outermost primaries are 

 new and unworn and may not yet have attained their full length. 



CHARADRIUS DUBIUS JERDONI (Legge) 



Jerdon's Little Ringed Plover 



AE[gia1itis] jerdoni Legge, Proc. Zool. Soc. London, 1880, pp. 3S-39. New name 

 for AEgialitis minutus "Pallas" Jerdon, 1864 ("in the Deccan, generally 

 among hills; and also from the top of the Eastern Ghats inland from Nel- 

 lore"), not Charadrius minutus Pallas, 1811. 



AEginlites dubia, Gyedenstolpe, Journ. Nat. Hist. Soc. Siam, 1915, p. 235 (listed) ; 

 Kungl. Svenska Vet.-Akad. Handl., 1916, p. 144 (Khun Tan). 



AEgialitis dubia- jerdoni, Gyldenstolpe, Ibis, 1920, p. 757 (Khun Tan). 



Charadrius ditbius jerdoni [partim], Deignan, Journ. Siam. Soc. Nat. Hist. 

 Suppl., 1931, p. 171 (Chiang Mai [partvm]) ; 1936, p. 82 (Chiang Mai 

 [partim] ) . 



Charadrius dubius jerdoni, de Schauensee, Proc. Acad. Nat. Sci. Philadelphia, 

 1928, p. 577 (Chiang Mai) ; 1929, p. 585 (Chiang Mai, Chiang Saen Kao).— 

 Rilet, U. S. Nat. Mus. Bull. 172, 1938, p. 86 (Chiang Mai). 



This little plover is rare and local in our provinces from April to 

 August but extremely common during the rest of the year, when its 

 numbers are augmented by visitors from other parts of its range. 

 Eisenhofer sent to Stockholm 11 specimens without other data than 

 "Khun Tan." I have collected it at Chiang Mai, Sala Mae Tha, Ban 

 Mae Klang, Ban Sop Mae Chaem, and Ban Na Noi (Nan Province). 

 The bird occurs at areas of sand and shingle along the major streams 

 and, during the cold weather, in the fields wherever there is open 

 water. 



There is still no definite record for the nesting of this bird in north- 

 ern Thailand, but I feel certain that it breeds, at least in small num- 

 bers, on the great sand bars near Wat Phranon, above Chiang Mai. 

 A male taken there, January 12, had the gonads slightly enlarged. 

 The nuptial season of this species, like that of our other riverside 

 breeders, must necessarily fall in the early part of the year, so that 

 the young may be on the wing before the breaking of the rains and 

 the rising of the waters. 



The plumage becomes much abraded, perhaps from the action of 

 wind-blown sand ; this is most marked in a bird of May 27. My only 

 specimen with virtually unworn feathers is an adult female from 

 Chiang Mai, November 27, which has presumably just completed the 

 prenuptial molt. 



Thai examples of this race have been recorded as having the irides 

 brown; the eye ring yellow; the bill black, yellow at the base of the 



