A an VISION OF THE GENUS GENNyEUS. ,675 



Distribution. — Williams' Silver Pheasant has a very vs^ell-defined 

 range, being confined to the moderately high hills l.ying between the 

 Manipur, Yaw, Oyu and Irrawaddy Rivers, and occurring, as a 

 straggler only, as far South as latitude 21° in the Minbu District 

 and as far North as Homalin and Tammu. It appears to be most 

 abundant between latitudes 22° and 24° and longitudes 94° and 

 96°, though it also occurs in some numbers about the lower hills 

 round Port White. Normally it is not a bird of very high eleva- 

 tions, and it is exceptional to find it above 4,000, its principal 

 haunts being from 2,000 to 3,000 feet. 



The following so-called species have been so named on incorrect 

 or insufficient ground, and must be considered synonyms of 

 ivilliamsi. 



Genncsus m,acdonaldi=2villiamsi. 



Type No. 123, Gates' Coll. B. M., 10.24.17.1910, described by Gates, B.N. 

 H. Journal, vol. xvii, p. 10 ; shot by P. Wickham on Mount Victoria at 

 6,000 feet. 



Although found at an untisual altitude for this sub-species, this particular 

 specimen agrees with birds which Gates himself calls ^oilliamsi from 

 Pakokku and the Lower Chindwin obtained at 2,000 feet and under. Gates' 

 type is an exceptionally fine old bird, with enormous spurs, and the inner 

 webs of the primaries white without mottling. This however is only a sign 

 of full maturity, and is found similarly in specimens of williamsi, cuvieri 

 and horsfieldi of equal age. 



Gates' type is exactly matched by a bird which Gates himself calls 

 ommaneyi from Kyouk Myoung, B. M. Coll., No. 1913.5.9.1. 



Gennceus om')naneyi= tvillia nisi . 



Type B. M. Coll., 1910.10.24.16, Loungshe, Pakokku. 



This bird was obtained in the extreme Sovith of the range occupied by 

 tvilliamsi, and somewhat approaches oatesi in having the markings on the 

 upper back very fine and narrow. It might possibly be considered by some 

 a hybrid between these two sub-species, but taking into consideration the 

 great variation in the width of the marking on the upper plumage of tvilliamsi, 

 I prefer to keep it as a synonym of this bird. It is well matched by other 

 specimens from Monywa and Kalewa in the centre of the area inhabited 

 by this Pheasant. 



S B. M. Coll., No. 1913-5-9-1. 



Genn^us lineatus. 



The Burmese Silver Pheasant. 

 S Plate i, fig. 2 ; $ Plate iii, fig. 2. 



Phasianus lineatus, Vigors, Phil. Mag. (1831), p. 147. 



Gennceus lineatus, Oates, Str. Peath., v, p. 164 ( 1877 ) ; 

 Ogilvie-Grant, Oat. Birds, B. M., xxii, p. 304 (1893) ; id. Hand-List, 

 Game B., i, p. 272 (1895); Blanford, Fauna Brit. Ind., iv, p. 92 

 (1898) ; Oates, Man. Game B., i, p. 351 (1898); Oates, Ibis (1903), 

 p. 100; id. Oat. Eggs, B. M., i, p. 55, pi. vi, fig. 5 (1901); Ghigi 

 Mem. Acad. Bologna (6) v, p. 140 (1908). 



