326 BULLETIN 17 2, UNITED STATES NATIONAL MUSEUM 



POMATORHINUS OCHRACEICEPS OCHRACEICEPS Waldcn 



Pomatorhinus ochraceiceps Walden, Ann. Mag. Nat. Hist., ser. 4, vol. 12, p. 487, 

 1873 (Kareen Hills, Burma). 



One male and one female, Khun Tan, 3,000 feet, February 15, 

 1932; one male, Khun Tan Mountains, 3,000 feet, May 13, 1933. 



Williamson ^^ adds the locality Muang Wang. Several collectors ^^ 

 have taken it on Doi Sutep, 3,500-4,600 feet. Chasen and Kloss ^'^ 

 report it from the Raheng District. 



The range of the form extends from the Karen Hills and Karenni 

 Mountains of Tenasserim to northern Siam. 



POMATORHINUS HYPOLEUCUS LAOTIANUS Delacour and Jabouille 



Pomatorhinus tickelli laotianus Delacour and Jabouille, Bull. Brit. Orn. Club, 

 vol. 47, p. 16, 1926 (Xieng-Khouang, Laos). 



Three males and five females, Pak Chong, eastern Siam, April 24, 

 May 5, and August 21, 1926, November 18-24, 1929, June 22, 1934; 

 one male, Hin Lap, December 11, 1931; one immature male, Lamton 

 Lang, May 28, 1934; two females, Kao Sabap, 2,000 feet, November 

 14, 1933; one male, Khun Tan, 3,000 feet, February 22, 1932; one im- 

 mature male, Khun Tan Mountains, 3,000 feet. May 11, 1933. 



The culmen in five males measures 39.5-45.5 (42) mm and in four 

 females 39-44.5 (41.2) mm. If the specimens are correctly sexed, 

 these measurements indicate considerable individual variation. 



I have been unable to compare these with any of the races, except 

 hypoleucus and brevirostris, to neither of which thej'' belong. They 

 seem nearer to the description of laotianus, to which they are nearest 

 geographically also. 



In brevirostris the ear coverts are russet, while in laotianvs they are 

 wood brown; the former has a much shorter bill. P. h. tickelli has a 

 shorter bill than P. h. laotianus. 



The male from Hin Lap (U. S. N. M. no. 331995) has the supra- 

 auricular wliite streaks extending forward to the nostril, forming a 

 complete superciliary stripe; the nape and russet postauricular patch 

 have some white streaks. It is the only specimen m the series so 

 marked. 



The specimen from Khun Tan, northern Siam, agrees with the 

 series from eastern Siam, so I presume Gjddenstolpe's record ^* of 

 P. h. tickelli from there really^ belongs to laotianus, the latter not 

 being described at the time he wrote ; de Schauensee ®^ has also 



»5 Journ. Nat. Hist. Soc. Siam, vol. 3, p. 16, 1918. 



«» De ?chauensee, Fr )c. Acad. Nat. Sci. Philadelpliia, vol. 81, p. 532, 1930; ibid., vol. 86, p. 187, 1934; Deig- 

 nan, Journ. Siam Soc. Nat. Hist. Suppl., vol. 8, p. 136, 1931; Chasen and Kloss, Journ. Siam Soc. Nat. Hist. 

 Suppl., vol. 8, p. 244, 1932. 



" Journ. Siam Soc. Nat. Hist. Suppl., vol. 7, p. 176, 1928. 



•8 Kungl. Svenska Vet.-Akad. Handl., vol. 56, no. 2, p. 52, 1916. 



•» Proc. Acad. Nat. Sci. Philadelphia, vol. 86, p. 188, 1934. 



