158 THE BIRDS OF THE WESTERN HALF 



In separating T. minnta and albescens in summer plumage 

 the red throat and the brown mottled breast at once distinguish 

 the latter ; but in winter plumage it is to a great extent guess 

 work ; but it has appeared to us that in albescens the bills are 

 shorter, that the tertiaries also are shorter, and, lastly, that the 

 tarsi are somewhat shorter. But of these three points, judg- 

 ino- from our summer-plumaged individuals, the shortness of 

 tbe bill is the best criterion. 

 ¥: gg6_ — Limicoia platyrhyncha, Tern. 



[Singapore.] 



901. — Hydrophasianus cUrurgus, Scop. 

 Although we have procured no specimens. Lieutenant Kelham 

 obtained it in full breeding plumage in Perak. 



* 912 his B. — Rallina mandarina,* SwinJi. 



[Malacca.] 



The occurrence of this, hitherto, purely Chinese species to- 

 wards the south of the Malay Peninsula is noteworthy. 



* 922 bis. — Ardea sumatrana, Ro-ffl. 



[Kussoom, and seen at Klang.] 



* 924. — Ardea purpurea, Lin. 



[Tonka.j 



* 927 bis. — Herodias eulopJiotes, Swin/i. 



[Tonka.] 



^ 928 bis. — Bemiegretta sacra, Gm. 



[Near Eussoom, seen Coast, ^am»t.] 



■^ 942 bis. — Graptocephalus davisoni, Hume. 



[Tonka.] 



955. — Anas scutulata, S. Mull. 



Davison met with this species (which is in no wise a Casarca 

 as Blyth and Jerdon seem to have considered it) in the forests 

 of Kussoom, but failed to procure a specimen. The bird is 

 quite unmistakable, and there can be no doubt about this. 

 ^ 986 ter. — Sterna tibetana, Saund. 



[Tonka.] 



Two somewhat immature specimens, which I identify with this 

 species, though somewhat doubtfully, since although I have 

 large series of albigena and tibetana, I have no authentic adult 

 longipennis. It is very easy to separate the adults of these 



* Should have been entered as R. paykulli, Ljungh, which name has precedence; 

 see full note towards the end of this number. 



I 



