THE BIRDS OF SOUTH-WEST AND PENINSULAR SIAM. 



131 



BUCEROTID>E 

 HORNBILLS. 



/Central tail featliers niucb elongated 

 (Central tail featliers not elongated 



(Casque small, compressed, crest very full . . 

 1 Casque large, truncated in front, crest not full 



(Casque large and high 

 {Casque small and low 



(Casque broad, ending in a double point 



I Casque compressed, ending in a single point 



(Outer tail feathers entirely white 



(Outer tail leathers only tipped with white . . 



(Casque compressed, smaller 



(Casque broad, composed of transverse ridges, larger 



(Chin and throat naked 

 (Chin and throat feathered 



(Bases of mandibles plicated 

 (Bases of mandibles not plicated . . 



Herpuicontis comnlun. 

 Hhinoplax VKjil. 



DicJtnccrns biconiis. 



AntJiracoccros coronatns convexns 

 A. albirostria. 



Anorrhinna (jnlerihis 

 . Plilohrvnis t. tickelli. 



lihijtiduceroH undulntiis. 

 B. siibruficoUis. 



200. Dichoceros bicornis (Linn.). 



Buceros bicornis, Linn., Syst. Nat. i, 1766, p. 153 (Sunda Straits). 



Dichoceros cavattts, A., p, 98 (Pakchan ; Bankasoon ; Malewuon). 



Dicoceros bicornis, B., p. 50 (Junk Seylon) ; D., p. 70 (Patani) ; 

 E., p. 108 (Patani); F., p. 35 (Terutau Id.); G., p. 150 (Rat- 

 buri and Petchaburi) ; J., p. 150 (Telibun Id.); L., p. 96 

 (Ghirbi). 



d. Tung Fran, Takuatung, Peninsular Siam, 18 February 

 1919 (No. 3988). 



J, 9. Tapli, Pakchan, Peninsular Siam, 2 March 1919 (No. 

 4358, 4360). 



" Iris red ; bill ivory, stained with j'-ellow, more orange at 

 the tip, extremities of casque black, base of lower mandible black ; 

 female with no black on casque ; feet greenish black ". 



Total length 6, 1100, 1155; 9, 1030; wing 6, 425, 470; 9, 

 465; tail, d 420, 400; 9, 330; tarsus cT, 72, 60; 9, 58; bill from 

 gape 9, 247, 212; 9, 207 mm. 



Common everywhere along the coast, especially on certain of 

 the islands. 



I- Gyldenstolpe, Kungl. Sv. Vet. Akad. Hanill. M. Baker, Jouin. N. H. Soc. Siam, iii. 1919. 



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



J. Robinson. Journ. V. M. S. Mus. vii, 1917 Baker, Joum. N. H. Soc. Siam. iii, 1919. 



K. Kloss, U)is, 1918. (second part). 



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



iii, 1919. (third t>art). 



VOL. V, NO. 2, 1922. 



