130 MESSRS. ROBINSON AND KLOSS ON 



198. Halcyon chloris humii Sharpe. 

 Halcyon humii, Shavpe, Cat. Birds Brit. Mus. xvii, 1892, p. 281, 



pi. viii (Seliiiigor). 

 Sauropatis chloris, B., p. 46 (Junk Seylon). 

 Halcyon humii, D., p. 69 (Patani) ; E., p. 110 (Patani). 

 Halcyon armstrongi, F., p. 34 (Langkawi and Terutau) ; H., p. 145 



(Koh Samui and K. Pennan). 

 Halcyon chloris, J., p. 149 (Langkawi and Pulau Lontar) ; L., p. 96 



(Pulan Panjang). 



One of us has recently examined a large series of the Blue- 

 anJ-white Kingfisher from the present area and is now of opinion that 

 two races may fairly be recognised (Jom-n. F. M. S. Mus., x, 1921, 

 p. 214), for though individuals do not always bear out this con- 

 clusion, yet in series the differences are quite tangible. 



The northern form, H. c. armstrongi, has the ear-coverts of 

 the same blue as the crown, though sometimes darker, the black 

 nuchal band obsolete or absent, and only a slight bufFy wash on the 

 flanks. The southern race, H. c. humi'i, has ear-coverts more 

 blackish, or of a darker different blue from the crown, the nuchal 

 band pronounced, and the flanks more strongly washed with buff. 

 The place where the forms intergrade seems to be in the neighbour- 

 hood of the Isthmus of Kra, and we have referred specimens 

 accordingly. 



199. Halcyon concreta (Temm.). 



Dacelo concreta, Temm. PI. Col. pi. 346, 1825 (S. W. Sumatra); 



Schleg. Mus. Pays Bas, Alced., 1863, p. 26. 

 Halcyon varia, Eyton, P. Z. S. 1839, p. 101 (Malacca, 9). 

 Halcyon concreta, A., p, 76 (Bankasoon and Malewoon) ; C. ii, p. 

 84; F., p. 35 (T.ang). 



As far as Peninsular Siam is concerned, only recorded from 

 Trang. In southern Tenasserim confined to the vicinity of the 

 Pakchan Estuary where, however, we did not meet with it. 



Most Bornean specimens have the blue of the upper surface 

 darker, as also the blue malar stripe, which is blacker posteriorly ; 

 but the dift'ej."ences are not very definite and can be matched by one 

 or two Malayan specimens. In females and younger males, both of 

 Malayan and Bornean birds, Ifle malar stripe is much brighter blue. 



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



B. Miillcr, Die (Jinis der Inselalanga, 188'2. F. Kobinson and Kloss, Ibis, 1910-11. 



C. Uates, Birds Brit. Biinnah, Vols. i. & ii883. G. Gairdner, Journ. N.H. Soc. Siam, i, 1915. 



D. Bonhote, r.Z.S. 1901, Vol. i. H. llobinson, Joiirn. F. M. S. Museums, v, 1915. 



JOURN. NAT. HIST. SOC. SIAM. 



