576 Messrs. Robinson mid Kloss oji Birds [Ibis, 



webs of- all the feathers becoming shining rich golden olive 

 at their edges, this colour increasing in extent on the outer 

 feathers and towards the base of the tail ; below black, 

 edged externally with olivaceous. Wings black on the inner 

 webs, the outer webs rather brighter than the tail, especially 

 basally, the upper secondaries and the tertiaries dark grey 

 washed on the outer webs with olivaceous, and with black 

 shaft-stripes. Primary coverts intense black, lesser wing- 

 coverts olive-grey tinged with rufous, median and greater 

 coverts deep rufous, internally blackish, edge of wing 

 yellowish white. Under wing-coverts and axillaries grey 

 with fulvous tips ; inner edges of rectrices narrowly 

 fulvescent below. 



Types. S ? • Langbian Peaks, 5500-7500 ft., S. Annam. 

 22-24 April, 1918. 



Male. T. L. 278 ; W. 102 ; T. 133 ; tarsus 40 ; bill from 

 gape 29 mm. 



Female. T. L. 268 ; W. 97 ; T. 125 ; tarsus 37 ; bill from 

 gape 27'5 mm. 



" Iris crimson, brown, or hazel ; bill black ; feet dark 

 brown.*' 



2 (^, 2 ? . Dalat, 5000 ft., S. Annam. 1 May, 1918. 



6 c?, 1 (? juv., 13 $ . Langbian Peaks, 5500-7500 ft., 

 S. Annam. 15-26 April. 



Males. T. L. 278, 280, 274, 275, 280, 277, 260, 260; 

 W. 102, 105, 98, 97, 101, 105, 100, 104 mm. 



Females. T. L. 268, 265, 272, 265, 270, 272, — , 270, 270, 

 260, 275, 260, 265, 268, 266 ; W. 97, 96, 95, 97, 98, 100, 

 — , 100, 102, 100, 100, 98, 102, 100, 102 mm. 



The series is somewhat variable in the tint of the under 

 surface, and some specimens have the sides of the breast in 

 the vicinity of the black deeper in colour. 



[This distinct species is named in honour of Dr. A. Yersin, 

 Director of the Pasteur Institute, French Indo-China, whom 

 I met at Nhatrang. 



Dr. Yersin was the discoverer of the Langbian Plateau, 

 and it gives a naturalist pleasure to associate his name with 

 its fauna. — C. B. K.I 



