NO. 14 THE RACES OF PELLORNEUM RUFICEPS — DEIGNAN 1 3 



District, Tenasserim Division, Burma, on January 25, 1904, by Wil- 

 liam L. Abbott. 



Diagnosis. — Similar to P. r. suhochraceum, but trenchantly sepa- 

 rated by having the rufous of front, crown, and nape deeper in tone 

 (almost chestnut) ; the hue of the remaining upper parts darker and 

 much more ruf escent ; the ground color of the under parts a richer, 

 almost rufescent, buff. 



Range. — Burma (Mergui Archipelago). 



Specimens examined. — Burma: Mergui District: Ross Island (i 

 male), Domel Island (i female), Sullivan Island (i male), Saint 

 Matthew Island (i male, i female). 



Remarks. — Macronoiis {"Mixornis") gidaris is another babbling 

 thrush that has evolved a distinct race on these islands ; it must be 

 called M. g. archipelagicus (Oberholser), 1922. 



16. PELLORNEUM RUFICEPS ACRUM, new subspecies 



Type. — U.S.N.M. No. 330563, adult male, collected at Yala (lat. 

 6°3o' N., long., ioi°i5' E.), Yala Province, Siam, on January 30, 

 193 1 > by Hugh McC. Smith (original number 4512). 



Diagnosis. — Similar to P. r, suhochraceum, but distinguishable in 

 series by having the rufous of the forehead, crown, and nape slightly 

 deeper in tone; the brown of the remaining upper parts darker and 

 colder (even more olivaceous and less rufescent than in P. r. minus) ; 

 the under parts rather more lightly washed with a somewhat paler 

 buff. 



Range. — Southwestern Siam (from the headwaters of the Mae 

 Klong) southward down the Malay Peninsula (excepting the Bur- 

 mese portion) to Perak and Pahang. 



Specimens examined. — Malaya: Pahang: Gunong Tahan (i 

 male) ; Kelantan: Sungei Lebir (i female) ; Perak: Taiping (i male, 

 I female); Siam: lat. 6°-7° N. : Narathiwat (4 males), Yala (i 

 male), Bukit Pattani (i male) ; lat. 7°-8° N. : Phatthalung (i male), 

 "Trang Province" (i male, i female), Chong (i male). Ban Phra 

 Muang (i male). Ban Tha Chin (i male, 2 females). Ban Thap 

 Thiang (i female) ; lat. 8°-9° N. : Khao Phanom Bencha (2 males), 

 Ban Krasom (i male). Ban Khiri Wong (i male), Nakhon Si Tham- 

 marat (2 females); lat. 9°-io° N.: Surat Thani (i male); lat. 

 ii°-i2° N. : Khao Nok Wua (i female), Khao Luang (4 males, 3 

 females), Prachuap Khiri Khan (4 males, 3 females) ; lat. i2°-i3° 

 N. : Khao Sam Roi Yot (3 males), Pran Buri (i male). Ban Kaeng 

 Sok (i male, i female). Ban Thung Luang (6 males, 2 females) ; 



