62 MESSRS ROBINSON AND KLOSS ON 



2d. Koh Lak, S. W. Siam. 3, 4 April, 1919. (Nos. 5007, 

 5044). 



" Iris (lark hazel ; eye lappet chrome or pale chrome ; bill 

 black, base of lower mandible yellow; feet dirty flesli, joints greyish, 

 toes black." 



Total length 170, 172; wing 108, 148; tail 64, 68; tarsus 

 23.5, 25; bill from gape 13, 16 mm. 



These specimens are in full breeding plumage, and on that 

 consideration, and from the date on which they were obtained, should 

 probably be referred to the tropical resident race, Ar. d. jerdoni, 

 Leggc, Proc. Zool. Soc. 1880, p. 39 (Ceylon and Central India), if that 

 race is to be kept distinct, as it probably should be. The northern 

 race should also occur in winter on migration, but is difficult to 

 distinguish in the series before us. 



69. Aegialitis alexandrinus dealbatiis SAvinh. 



Aeyialitis dealbatus, Swinh., P. Z. S. 1870, p. 138 (South Coast, 



China). 

 Aeyialitis ulexandr'ma, I., p. 145 (Koh Lak). 

 Charadrius alexandrhms dealbatus, Havtert and Jackson, Ihis, 



1915, p. 528 ; K., p. 85 (Koh Lak). 

 Aecjialitis cantianus, A., p. 456 (Mergui). 



All specimens of this Plover that we have seen from Siam 

 and from the Malay • Peninsula in winter have large bills, from 

 15 — 19 mm. measured on the bare part of the culmen, and therefore 

 must be considered to belong to the Chinese and Hainan race in 

 winter quarters. We have no evidence that the typical Ae. a. 

 alfixandriaufi (i. e., the bird with a small bill) comes as far south as 

 the Malay Peninsula, though our series is not large. On the other 

 hand, we think it probable that many specimens which are really 

 females or young examples of the following race have been confused 

 with the present form or with Ac. a. (dcxandrinus. 



Kloss notes the soft parts as, " Iris dark ; bill black ; legs 

 stone-grey or yellowish grey ; feet grey-black." 



A. ITumc & Uavison, Stray Feathers, vi, 1878. E. O. Orant, Fasciculi Malayenses, iii (Birds), 1905 



B. Miiller, Die Oi-nis der Insel Salaiiffa, 188-2. F. KoViinson and Kloss, Iliis, 1910-11. 



C. OatoH, liirds Brit. Biirmali, Vols, i k ii, 1883. G. Ciairdnor, Joiun. N. H. Soc. Siam, i, 191.'>. 



D. lioiihole. V. 'A. S. 1901, Vol. i. H. Kobinson, Jouin. F. M. B. Museums, v, 191.5, 



JOURN. NAT. HIST. SOC. SIAM. 



