30 Journal of the F.M.S. Museums. [Vol. VI» 



having a slight rufescent tinge. On the under-surface the 

 breast-band, light olive-brown in colour, is much broader, 

 extending over the chest to the abdomen and flanks, and the 

 white throat patch is less clear, being slightly washed with the 

 colour of the chest and sides of neck, while the lower abdomen 

 is pale ivory yellow. 



The bill, as compared with that of R. pectoralis, has the 

 upper mandible slightly less keeled and the lower is pale, not 

 blackish. 



Length of wing, 80 mm; tail, 61; tarsus 16.7; bill from 

 gape, 20.5. 



Dr. E. Hartert, who has examined the two individuals 

 from Tampin (an adult and a slightly immature female) has 

 kindly sent us the following remarks : " The new form 

 resembles much more the large-billed Rh. colonics, Hartert, from 

 Sula Mangoli and Rh. nicobaricia from the Nicobars (than 

 R. pectoralis). It differs, however, from Rh. colonits chiefly in 

 the tail, which is brown and not chestnut rufous, and from 

 Rh. nicobarica also in the less rufescent edges to the rectrices, 

 somewhat more olivaceous back and rump and a little darker 

 chest-band. It agrees with both the latter in the lower 

 mandible being light in the adult birds.'' In these two 

 individuals the abdomen lacks the yellow tinge of the male. 



Type: Adult male, Genting Bidai, Selangor-Pahang 

 Boundary, Malay Peninsula, 2,300 ft. 19th September 1914, 

 F. M. S. Mus. No. 157/14. 



