THE BIRDS OF SOUTH-WEST AND PENINSULAR SIAM. 76 



CiCONIIDAE. 



Storks. 



Anastomus oscitans. 



Leptoptilns dubia. 

 Leptoptilus javanica . 



, f Mandibles separated in middle 

 1 Mandibles normal 



„ f Top of head with a bony cap, unfeathered 

 1 Top of head without a bony cap, variably feathered 



(^Larger, with a gular pouch; wing 30 inches or over 

 3 -! Smaller, without a gular pouch ; wing 27 inches 

 i or under 



. fBill straight, crown feathered 

 iBill deeurved, crown naked 



_ (Feathers of the neck white, silky . . Dissoiira episcopus neglecta. 



( Feathers of the neck black, normal . . Xenorhynchns asiaticus. 



/Larger, secondaries rosy in adults, 

 „ ' wing-coverts black and white . . . . Pseudotantalus leucocephalns. 



j Smaller, secondaries with no rosy flush , 

 i wing-coverts white .. .. Pseudotantalus lacteus* 



95. Leptoptilus dubia (Grn. ). 



Ardea dubia, Gmelin, Syst. Nat. i, 1788, p. 624 (India and Africa). 



Leptoptilus argala, C. ii, p. 262 (Tenasserim). 



Leptoptilus dubia, G., p. 152 (Ratburi and Petchaburi) ; I., p. 141 

 (Ratburi). 



We have seen no specimens of the larger Adjutant Bird from 

 the Malayan area or from Peninsular Siam, and doubt if it occurs 

 south of Ratburi. In life it can be distinguished by the possession 

 of a gular pouch, by its much larger size, and by having a grey band 

 across the secondary coverts in breeding birds, not a coppery red one 

 as in L. javanica. The species is said to occur in Java, but the 

 identification appears to rest on skeletons and skulls. 

 96. Leptoptilus javanica (Horsf.). 



Ciconia javanica, Horsfield, Trans. Linn. Soc, xiii, 1821, p. 188 



(Java). 

 Leptoptilus javanicus, A., f. 469 (Pakchan) ; I., p. 141 (Koh Lak) ; 



L., p. 92 (Junk Seylon). 

 Leptoptilus dubius F., p. 16 (Trang). 



Common throughout the area, generally in rice fields, in man- 

 grove swamps and on the coastal flats. 



*lncluded in the key in the possible event of its occurrence in the area. 



!• Gyldenstolpe, Kungl. Sv. Vet. Akad. Handl. M. Baker, Journ. N. H. Soc. Siam. iii, 1919. 



56, No. 2, 1916. (first part). 



«l. Robinson, Journ. F. M. S. Mus. vii, 1917. Baker. Journ. N. H. Soc. Siam, iii, 1919. 



K- Kloss, Ibis, 1918. (second part). 



L. Kobinson and Kloss, Journ. N. H. Soc. Siam, M. I. Baker, Journ. N. H. Soc. Siam, iv, 1920. 



iii, 1919. (third part). 



VOL. V, NO. 1, 1921. 



