1846.] or Little Known Species of Birds. 311 



Eurylaimns, Horsfield. This group, the geographic limits of which, 

 according to Mr. Swainson, " seem to be restricted to the hottest parts 

 of India," is only admissible into the Fauna Indica from the occur- 

 rence of two Himalayan species, the range of both of which extends to 

 Assam, Sylhet, and Arracan. These birds are the Raya sericeogula 

 and R. rubropygia of Mr. Hodgson, J. A, S. VIII. 36; the former 

 standing as Psarisomus Dalhousice, (Jameson) Sw., and the latter 

 falling under Mr. Swainson's Serilophus, being very closely allied to S. 

 lunatus, (Gould), for which it was mistaken in Proc. Zool. Soc. 1839, 

 p. 156. The differences are as follow : — S. lunatus has the whole upper- 

 parts rufescent, including the crown and cheeks ; and it exhibits a re- 

 markable structure of the tips of its primaries, the third and fourth 

 especially, which terminate in acute points, as if artificially clipped, 

 while the secondaries and tertiaries are truncate, and strongly emar- 

 ginate at tip ; moreover the third and fourth primaries are termi- 

 nated by a large triangular white spot, and the secondaries and tertiaries 

 have no white bar near the end of their outer webs: — 5. rubropygius 

 has the upper- parts deep ash-colour, with a faint rufescent tinge on 

 the back ; the primaries rounded at their tips, and narrowly termi- 

 nated with white; the secondaries and tertiaries slightly truncate 

 and emarginate at tips, with a triangular white spot near the end of 

 the black outer web of each, beyond which the colour is bluish-grey. 

 The white lunate mark tipping certain feathers of the sides of the neck 

 is alike in both species, and does not seem to be a sexual distinction, 

 but, I suspect, is attained after two or three moultings by both sexes. 

 «S. lunatus occurs in the Tenasserim Provinces, where also are found 

 the Corydon sumatranus (which is the species described by Capt 

 Hay, in X, 575), — Eurylaimus javanicus (the range of which extends 

 northward to Arracan),— Eu. ochromalus (v. cucullatus, Tern), — and 

 Cymbirhynchus nasutus (v. lemniscatus, Raffles), all common 

 Malayan species, to judge from their frequency in collections from the 

 Straits. 



Cymbirhynchus was separated by Mr. Vigors on account of the for- 

 ward position of the nostrils and some other particulars; and Mr. 

 Swainson lays much stress upon the vertical depth of its bill, which cer- 

 tainly is a marked feature in the common Malayan and Tenasserim 

 species (C. nasutus); but there is a very closely allied species in 



