64 BULLETIN 17 2, UNITED STATES NATIONiUL MUSEUM 



quite different. In diversa the chest is russet, wiiile in cambodiana it 

 is more of a hazel; the breast feathers of the latter are described as 

 tipped witn chestnut, wnile in the former they are tipped witJti hair 

 brown. The back is more heavily barred with black in cambodiana. 

 Briefly, while these two forms are similar in color pattern, they differ 

 widely in detail, but as they evidently represent each other in separate 

 mountain areas, it is probably best to treat them as races. A. diversa 

 came from an isolated mountain range v,here little or no collecting 

 iiad been done prior to Dr. Smitli's visits. 



Briefly, the two subspecies may be summarized as follows: 



Lower throat black; chest russet; back with narrow black bars diversa 



Lower throat hazel with only narrow black edges to the feathers; 



chest hazel; back with broad black bars cambodiana 



The form was founded upon a single male. Dr. Smitli paid a second 

 visit to the mountain about three years later and secured four speci- 

 mens. The second male resembles the type, except that the throat 

 is not so extensively black and the pileum and nape are rather heavily 

 spotted with black. The females do not differ materially from the 

 males, except that tlie black is more restricted on the lower throat, 

 the pileum more heavily spotted with black, the forehead more of a 

 cinnamon-bro%vn, and tlie chest is a little deeper russet. 



No two of the females are alike. In one, the black on the pileum 

 predominates over the basic color and the black bars on the upperparts 

 are more pronounced than in the males. The black barring on the 

 upperparts in the other two females is more like that of the males. 

 In anotiier (no. 333610) the russet of the chest is deep and pronounced, 

 almost hazel; the tawny of the chin extends down and includes the 

 throat, the black restricted to the lower throat or jugulum. 



The two males measure: Wing, 141-143; tail, 59-61 ; culmen, 20-20 

 mm. The three females: Wing, 130-132 (131.3); tail, 54-56 (54.7); 

 culmen, 18.5-19 (18.8) mm. 



The range of the present form is the isolated mountain range in 

 soutlieastern Siam, extending into Cambodia. 



The related form, Arborophila cambodiana cambodiana Delacour 

 and Jabouille, is known only from the region around Bokor, southern 

 Cambodia. 



TKOPICOPEUUIX CHARLTONI CHARLTONI (Eyton) 



Perdix charltoni Eyton, Ann. Mag. Nat. Hist., ser. 1, vol. 16, p. 230 , 1846 

 (Malacca). 



One male, Sichol, Bandon, Sei)tember 5, 1929; two males, Kao Sol 

 Dao, Trang, January 19 and 26, 1934. 



Dr. W. L. Abbott collected six males and two females in Trang (Lay 

 Song Hong, December 3, 1896; near Kao Nok Ram, January 2-4, 

 1899; Trang, February 22-25, 1899). He describes the soft parts as: 



