l8 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 10/ 



23. PELLORNEUM RUFICEPS UBONENSE, new subspecies 



Type. — A.N.S.P. No. 126892, adult male, collected at Ban Chanu- 

 man (lat. 16° 15' N., long. 105 °oo' E.), Ubon Province, eastern 

 Siam, on February 3, 1936, by collectors for R. Meyer de Schauensee 

 (original number 491 ) . 



Diagnosis. — From P. r. vividum easily separable in series by having 

 the rufous of the front, crown, and nape lighter and brighter ; the 

 brown of the remaining upper parts lighter and more olivaceous (less 

 rufescent than in any one of the three precedent races) ; the dark 

 centers to the feathers of the uppermost back usually absent or, if 

 present, almost invisible ; the under parts as boldly streaked, but on a 

 ground color nearer white, less strongly washed with buff. 



From P. r. chthonium distinguishable in series by having the brown 

 of the upper parts slightly darker and a little more olivaceous; the 

 central streaks of the feathers of the breast and sides of the abdomen 

 broader and more blackish brown, on a whiter, less buffy, ground 

 color. 



Range. — Easternmost Siam (Ubon Province). 



Specimens examined. — Siam : Ubon Province : Ban Chanuman (2 

 males, 4 females). Ban Khemmarat (2 males, 2 females). 



Remarks. — The one specimen seen from Ban Bua Yai on the 

 plateau of eastern Siam (mentioned in Remarks under P. r. chthon- 

 ium) does not agree well with this series and probably belongs with 

 another race. 



24. PELLORNEUM RUFICEPS subsp. 



Four specimens from Pakse and Ban Kok in the Boloven region 

 of Bas-Laos (a fifth is quite obviously mislabeled and belongs with 

 some other population) stand very near to P. r. ubonense, but seem to 

 have the brown of the upper parts a little paler. With so short a 

 series, I am not prepared to name these birds on so slight a character, 

 but it would be surprising if better material did not show that here 

 also we have a distinct race. 



25. PELLORNEUM RUFICEPS subsp. 



A specimen taken by Boden Kloss at Daban in southern Annam is 

 much like P. r. acrum above, and has the ground color of the under 

 parts much as in P. r. chthonium, but differs from all others before 

 me in the breadth of the dark streaks, which seem to form an almost 

 unbroken band across the breast. Since its provenience is known to 



